Earth's Busy Neighborhood
ACC's Small Object Report for 16 to 22 April 2007
A semi-automated report compiled on 22 April 2007 at 2359 UTC
Seventeen small asteroids were reported in the last 168 hours, during which eight were newly discovered.
Currently 1,302 NEAs are listed with H>22.0 by JPL and/or the MPC (1,120 are listed as such by both).
[ news | objects by size | object index alpha/cross-ref | 48 Hours | viewing | weekly ]
Editor's note: As asteroids go, "small" is defined as having an
absolute magnitude (brightness) calculated at greater than H=22.0, which
converts very roughly to a diameter under 135 meters.
No matter how close they come to the Earth, the astronomical community
does not classify such objects as "potentially hazardous." However, as
demonstrated by the mile wide (1.6 km.) Barringer Crater in Arizona, blasted
out by a "small" asteroid some 50,000 years ago, there are asteroids too small
to be labeled "potentially hazardous" that actually could cause severe local
damage. These are sometimes called "Tunguska-class objects" (TCOs), after the
1908 event probably caused by a comet fragment or asteroid too small to be
classified today as hazardous but packing enough wallop to flatten a Siberian
forest area the size of a large city.
NEODyS in December 2005 changed its main Risk page to classify "Objects too
small to result in heavy damage on the ground" as having "absolute
magnitude > 25," which corresponds to perhaps 35 meters wide.
And JPL two months earlier started flagging (with a blue background) risk-listed
objects of "Estimated diameter 50 meters or less" as "not likely to
cause significant damage in the event of an impact, although impact damage
does depend heavily upon the specific (and usually unknown) physical
properties of the object in question."
Small asteroids that come close enough to Earth to be seen have significant
potential for scientific study today, and for exploration and
exploitation in the future. They present a sampling of distant asteroid
populations and a few may be remnants of the event that created the
Earth-Moon system.
Some of these objects are discovered while close to Earth moving across the sky
quite quickly, when they are called "FMOs" or "VFMOs" (very fast moving objects).
The discovery and follow-up tracking of asteroids with H>22.0 represents
some of the most difficult and very best observing work being done today by
amateur and professional astronomers around the world, and the page you are
reading is dedicated to recognizing their ongoing successes.
Small Object News (newest items first) [ object listings |
index |
48 Hours |
viewing |
weekly |
top ]
- April 22: Sunday's Daily Orbit Update (DOU) MPEC reports observations of four small asteroids. Great Shefford Observatory in England brought in the first follow-up (in multiple sets overnight) for 2007 HV4, which passes Earth today at 1.4 lunar distances, and first follow-up for 2007 HW4 came from Antares and Eschenberg observatories in Illinois and Germany, while KLENOT in the Czech Republic provided additional observations of both objects from within their discovery arcs. Guidestar Observatory in Germany as well as Eschenberg and Great Shefford tracked risk-listed 2007 HP. And Pla D'Arguines Observatory in Spain doubled 2007 GU4's observing arc to about eight days.
- April 21 #2: On Saturday, discovery of a second small asteroid has been announced. 2007 HW4 was found from Arizona by the Mt. Lemmon Survey yesterday morning UT and was confirmed overnight by Heidelberg-Konigstuhl and Guidestar observatories in Germany and by Farra d'Isonzo, Great Shefford, and Farpoint observatories in Italy, England, and Kansas.
Today's DOU MPEC 2007-H36 reports observations of three small asteroids. Antares Observatory in Illinois extended 2007 FJ1's observing arc from about 21 to 34 days. Risk-listed 2007 HP was tracked by Sandlot and Eschenberg observatories in Kansas and Germany, and Sandlot also observed 2007 HC.
- April 21 #1: Discovery of small asteroid 2007 HV4 has been announced. It was spotted by the Mt. Lemmon Survey yesterday morning and was confirmed last evening by Great Shefford Observatory in England. JPL reports that this object will pass Earth at 1.4 lunar distances tomorrow, and the MPC is showing that it will go out of view around two days later.
- April 20: On Thursday the discovery of small asteroid 2007 HL4 has been announced, found from Arizona yesterday morning by the Mt. Lemmon Survey (MLS) and confirmed last night by Farra d'Isonzo and Great Shefford observatories in Italy and England and this morning by Sandlot and Sabino Canyon observatories in Kansas and Arizona and by the MLS itself.
Today's DOU MPEC 2007-H23 reports observations of three small asteroids. Great Shefford doubled the observing arc of 2007 GY5 to about four days and, with Powell Observatory in Kansas, provided the first follow-up for 2007 HP. And the Siding Spring Survey in Australia tracked its own discovery, 2007 HC.
- April 19: Discovery of one small asteroid, 2007 HY3, has been announced. It was discovered yesterday morning from Arizona by the Mt. Lemmon Survey, which alone confirmed it this morning. And today's DOU MPEC 2007-H18 reports observation of one other small asteroid, 2004 HZ, which was tracked by Spacewatch in Arizona with its 0.9-meter telescope.
- April 18 #2: See news about 6R10DB9, which is the discovery designation for what may be man-made hardware or a meter-size asteroid temporarily circling Earth before escaping back into a heliocentric orbit.
- April 18 #1: On Wednesday, the discovery of one small asteroid is reported. 2007 HP was found and followed this morning from Arizona, and was announced with a 3.664-hour discovery arc from when the Catalina Sky Survey first spotted it to confirmation by Sabino Canyon Observatory. JPL reports from the preliminary data that this object passed Earth at about 4.8 lunar distances on April 13th. Update: 2007 HP has been listed as an impact risk.
Today's DOU MPEC 2007-H14 reports observations of three small asteroids. 2007 HC has been delisted as an impact risk after receiving its first follow-up, which came from the discoverer, the Siding Spring Survey in New South Wales, as well as Great Shefford Observatory in England and Spacewatch with its 1.8-meter telescope in Arizona. 2007 GU1, which is now out of view, was reported from Moletai Observatory in Lithuania on April 14th. And 2007 GU4 had its observing arc doubled to about four days by Naef Observatory in Switzerland.
- April 17: Tuesday's DOU MPEC 2007-H11 reports observations of eight small asteroids. 2007 GX5 and 2007 GY5 had their discovery arcs filled in or slightly extended by Antares Observatory in Illinois and extended by about half a day by KLENOT in the Czech Republic. 2004 HZ was reported from LINEAR in New Mexico, 2007 CQ5 from Petit Jean Mountain South Observatory in Arkansas, 2007 DX from the Mt. Lemmon Survey in Arizona, and 2007 GU4 from Powell and Eschenberg observatories in Kansas and Germany. 2007 GU1, which went out of view today, was observed by Szamotuly-Galowo Observatory in Poland on the 13th. And 2007 GY1 was tracked by the Catalina Sky Survey in Arizona, Petit Jean, KLENOT, and Wildberg Observatory in Germany.
- April 16 #2: The discovery of small asteroid 2007 HC has been announced, found today by the Siding Spring Survey in Australia and confirmed this evening by KLENOT in the Czech Republic. The MPC's ephemeris has it passing Earth at about 4.3 lunar distances (LD) on April 26th and going out of view for all ground-based optical telescopes within two days of that.
Updates: JPL has listed 2007 HC as an impact risk and gives its own first estimate of this object's Earth passage as occurring at 2.8 to 5.5 LD or more on April 27th, with an uncertainty of just over two hours.
Another discovery today, a not-so-small asteroid, will also be making a fairly close passage even sooner, like tomorrow, April 17th at 0952 UTC at 5.8 to 6.5 LD or more. Its diameter is estimated to be on the order of 235 meters. 2007 HA was reported in MPEC 2007-H09 as having been discovered this morning from New Mexico by LINEAR and confirmed this evening by Farra d'Isonzo Observatory in Italy.
- April 16 #1: On Monday the discoveries of two small asteroids have been announced, both found from Arizona yesterday morning. 2007 GX5 was discovered by the Catalina Sky Survey and confirmed by nine observatories in Europe and the U.S. JPL reports that this object passed Earth at around 8.3 lunar distances on April 9th. 2007 GY5 was discovered by the Mt. Lemmon Survey and was confirmed by KLENOT and by Powell Observatory in Kansas, both of which were also in on the 2007 GX5 confirmation.
Today's DOU MPEC 2007-H01 reports observations of six small asteroids. 2007 GU4 was delisted as an impact risk after receiving its first follow-up, from Guidestar (on the 14th and 15th), New Millennium, and Great Shefford observatories in Germany, Italy, and England. Farpoint Observatory in Kansas added about 32 days to 2007 DX's 25-day observing arc. And recent discoveries 2007 GU1 and 2007 GY1 received follow-up from respectively seven and six observing facilities.
David Tholen's team on Mauna Kea in Hawaii reported March 9th observations of multi-oppositional 2000 SJ344 and 2001 CP36 on its second opposition, catching them at apparent magnitudes in the range of R=23.1 to 23.5. 2000 SJ344 was discovered on 30 Sept. 2000 (at R=21.7 to 21.9) by Tholen and Robert Whiteley (MPEC 2000-U21). It was followed into 2001 for an arc of 200 days and was recovered in May 2005 and observed for another 35 days. Last year it was also observed in April and December (see news). All of this observing work, with one exception, was from Tholen's team and went as faint as R=24.8. 2001 CP36 was discovered from New Mexico by LINEAR on 15 February 2001 (MPEC 2001-D02) and was tracked for only 7.441 days during a passage that brought it to about 4.8 lunar distances from Earth, but that included 145 optical observations and radar from Arecibo in Puerto Rico.
- See news from the week of 9-15 April and from previous weeks. You also can look up reports on individual small asteroids.
Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2007 HV4 (K07H04V) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 6 meters per JPL H=28.70, MPC H=28.7
JPL classifies 2007 HV4 as an Apollo and calculates an Earth MOID of 0.003615 AU (1.41 LD),
and reports this object passes Earth at 1.4 lunar distances (LD) on 22 April 2007 at 1618 UT.
Observations are reported from the following observatories in MPECs 2007-H34 and 2007-H40:
Mt. Lemmon Survey (MLS) [G96]
2007-04-20 0501-0525, 4 pos. in MPEC 2007-H34, discovery (*)
2007-04-20 0634-0637, 4 pos. in MPEC 2007-H34, confirmation
2007-04-20 0916-0919, 4 pos. in MPEC 2007-H34, confirmation
KLENOT [246]
2007-04-20 1959-1959, 1 pos. in MPEC 2007-H40, follow-up (t)
Great Shefford Obs. [J95]
2007-04-20 2137-2254, 6 pos. in MPEC 2007-H34, confirmation
2007-04-21 2024-2055, 5 pos. in MPEC 2007-H40, follow-up
2007-04-21 2238-2239, 2 pos. in MPEC 2007-H40, follow-up
2007-04-22 0029-0042, 3 pos. in MPEC 2007-H40, follow-up
2007-04-22 0150-0203, 3 pos. in MPEC 2007-H40, follow-up
2007 HY3 (K07H03Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 26 meters per JPL H=25.56, MPC H=25.6
JPL classifies 2007 HY3 as an Amor and calculates an Earth MOID of 0.042339 AU (16.47 LD),
and reports this object passed Earth at 19.6 LD on 20 April 2007.
Observations are reported from the following observatories in MPEC 2007-H21:
Mt. Lemmon Survey (MLS) [G96]
2007-04-18 1053-1145, 9 pos. in MPEC 2007-H21, discovery (*)
2007-04-19 0811-0814, 4 pos. in MPEC 2007-H21, confirmation
2007-04-19 0949-0953, 4 pos. in MPEC 2007-H21, confirmation
2007 HC (K07H00C) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 29 meters per JPL H=25.30, MPC H=25.3
This object was listed from 17 until 18 April 2007 as an impact risk.
JPL classifies 2007 HC as an Apollo and calculates an Earth MOID of 0.003255 AU (1.27 LD),
and reports this object will pass Earth at 4.8 LD on 26 April 2007 at 0427 UT.
Observations are reported from the following observatories in MPECs 2007-H10, 2007-H14,
2007-H23, and 2007-H36:
Siding Spring Survey (SSS) [E12]
2007-04-16 1240-1317, 4 pos. in MPEC 2007-H10, discovery (*)
2007-04-17 1123-1216, 2 pos. in MPEC 2007-H14, follow-up
2007-04-17 1618-1624, 2 pos. in MPEC 2007-H14, follow-up
2007-04-19 1246-1249, 2 pos. in MPEC 2007-H23, follow-up
KLENOT [246]
2007-04-16 2149-2158, 10 pos. in MPEC 2007-H10, confirmation
Great Shefford Obs. [J95]
2007-04-17 2100-2113, 3 pos. in MPEC 2007-H14, follow-up
Spacewatch 1.8m telescope [291]
2007-04-18 0428-0503, 3 pos. in MPEC 2007-H14, follow-up (t)
Sandlot Obs. [H36]
2007-04-20 0404-0422, 4 pos. in MPEC 2007-H36, follow-up
2007 GU1 (K07G01U) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 35 meters per JPL H=24.94, MPC H=24.9
This object was listed from 11 until 12 April 2007 as an impact risk.
JPL classifies 2007 GU1 as an Apollo and calculates an Earth MOID of 0.000060 AU (0.02 LD),
and reports this object passed Earth at 2.1 LD on 16 April 2007 at 0037 UT.
Lowell Observatory reports 2007 GU1 has an MOID of 0.04553 AU (17.72 LD) with Mars.
Observations are reported from the following observatories in MPECs 2007-H01, 2007-H11,
and 2007-H14:
Szamotuly-Galowo Obs. [B30]
2007-04-13 2259-2353, 38 pos. in MPEC 2007-H11, follow-up
Catalina Sky Survey (CSS) [703]
2007-04-14 0649-0719, 4 pos. in MPEC 2007-H01, follow-up
Mt. Lemmon Survey (MLS) [G96]
2007-04-14 0903-0904, 3 pos. in MPEC 2007-H01, follow-up
Parma Obs. [A56]
2007-04-14 2212-2304, 6 pos. in MPEC 2007-H01, follow-up
Moletai Obs. [152]
2007-04-14 2250-2252, 4 pos. in MPEC 2007-H14, follow-up
Great Shefford Obs. [J95]
2007-04-14 2327-2330, 3 pos. in MPEC 2007-H01, follow-up
Verona Obs. [A48]
2007-04-14 2345-2348, 5 pos. in MPEC 2007-H01, follow-up
KLENOT [246]
2007-04-15 0022-0024, 3 pos. in MPEC 2007-H01, follow-up (t)
Farpoint Obs. [734]
2007-04-15 0528-0532, 5 pos. in MPEC 2007-H01, follow-up
See also information from the week ending 15 April 2007.
2007 GX5 (K07G05X) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 47 meters per JPL H=24.30, MPC H=24.3
JPL classifies 2007 GX5 as an Apollo and calculates an Earth MOID of 0.013314 AU (5.18 LD),
and reports this object passed Earth at 8.3 LD on 9 April 2007 at about 0857 UT.
Lowell Observatory reports 2007 GX5 has significant MOIDs with planets Venus (0.00821 AU =
3.19 LD) and Mars (0.00363 AU = 1.41 LD).
Observations are reported from the following observatories in MPECs 2007-H04 and 2007-H11:
Catalina Sky Survey (CSS) [703]
2007-04-15 0627-0819, 8 pos. in MPEC 2007-H04, discovery (*)
KLENOT [246]
2007-04-15 2205-2210, 7 pos. in MPEC 2007-H04, confirmation
2007-04-16 2024-2032, 5 pos. in MPEC 2007-H11, follow-up
Remanzacco Obs. [473]
2007-04-15 2223-2259, 2 pos. in MPEC 2007-H04, confirmation
Drebach Obs. [113]
2007-04-15 2235-2238, 4 pos. in MPEC 2007-H04, confirmation
Heidelberg-Konigstuhl Obs. [024]
2007-04-15 2243-2250, 3 pos. in MPEC 2007-H04, confirmation
Great Shefford Obs. [J95]
2007-04-16 0041-0055, 3 pos. in MPEC 2007-H04, confirmation
Powell Obs. [649]
2007-04-16 0418-0427, 3 pos. in MPEC 2007-H04, confirmation
Antares Obs. [H55]
2007-04-16 0546-0554, 3 pos. in MPEC 2007-H11, follow-up
Sabino Canyon Obs. [854]
2007-04-16 0625-0634, 3 pos. in MPEC 2007-H04, confirmation
Mt. Lemmon Survey (MLS) [G96]
2007-04-16 0744-0747, 3 pos. in MPEC 2007-H04, confirmation
Sandlot Obs. [H36]
2007-04-16 0804-0816, 3 pos. in MPEC 2007-H04, confirmation
2007 HL4 (K07H04L) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 49 meters per JPL H=24.20, MPC H=24.2
JPL classifies 2007 HL4 as an Amor and calculates an Earth MOID of 0.032584 AU (12.68 LD),
and reports this object passed Earth at 16.5 LD on 17 April 2007.
Observations are reported from the following observatories in MPEC 2007-H24:
Mt. Lemmon Survey (MLS) [G96]
2007-04-19 0920-1134, 12 pos. in MPEC 2007-H24, discovery (*)
2007-04-20 1055-1057, 4 pos. in MPEC 2007-H24, confirmation
Farra d'Isonzo Obs. [595]
2007-04-19 2320-2340, 2 pos. in MPEC 2007-H24, confirmation
Great Shefford Obs. [J95]
2007-04-20 0243-0254, 2 pos. in MPEC 2007-H24, confirmation
Sandlot Obs. [H36]
2007-04-20 0701-0719, 3 pos. in MPEC 2007-H24, confirmation
Sabino Canyon Obs. [854]
2007-04-20 0735-0749, 3 pos. in MPEC 2007-H24, confirmation
2007 GY5 (K07G05Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 55 meters per JPL H=23.95, MPC H=24.0
JPL classifies 2007 GY5 as an Apollo and calculates an Earth MOID of 0.075484 AU (29.37 LD),
and reports this object will pass Earth at 35.3 LD on 24 April 2007.
Lowell Observatory reports 2007 GY5 has an MOID of 0.03964 AU (15.42 LD) with Mars.
Observations are reported from the following observatories in MPECs 2007-H05, 2007-H11,
and 2007-H23:
Mt. Lemmon Survey (MLS) [G96]
2007-04-15 0742-0916, 7 pos. in MPEC 2007-H05, discovery (*)
2007-04-16 0639-0641, 4 pos. in MPEC 2007-H05, confirmation
KLENOT [246]
2007-04-15 2140-2141, 2 pos. in MPEC 2007-H05, confirmation (t)
2007-04-16 2050-2051, 2 pos. in MPEC 2007-H11, follow-up (t)
Powell Obs. [649]
2007-04-16 0306-0320, 4 pos. in MPEC 2007-H05, confirmation
Antares Obs. [H55]
2007-04-16 0518-0527, 3 pos. in MPEC 2007-H11, follow-up
Great Shefford Obs. [J95]
2007-04-18 2218-2306, 3 pos. in MPEC 2007-H23, follow-up
2007 FJ1 (K07F01J) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 57 meters per JPL H=23.88, MPC H=23.9
JPL classifies 2007 FJ1 as an Amor and calculates an Earth MOID of 0.092173 AU (35.86 LD),
and reports this object passed Earth at 36.4 LD on 23 March 2007.
Observations are reported from the following observatories in MPEC 2007-H36:
Antares Obs. [H55]
2007-04-20 0648-0728, 3 pos. in MPEC 2007-H36, follow-up
See also information from the week ending 15 April 2007.
2007 HW4 (K07H04W) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 61 meters per JPL H=23.72, MPC H=23.7
JPL classifies 2007 HW4 as an Apollo and calculates an Earth MOID of 0.014683 AU (5.71 LD),
and reports this object will pass Earth at 23.8 LD on 28 April 2007.
Observations are reported from the following observatories in MPECs 2007-H35 and 2007-H40:
Mt. Lemmon Survey (MLS) [G96]
2007-04-20 0654-0718, 4 pos. in MPEC 2007-H35, discovery (*)
2007-04-20 0925-0927, 4 pos. in MPEC 2007-H35, confirmation
KLENOT [246]
2007-04-20 1947-1948, 2 pos. in MPEC 2007-H40, follow-up (t)
Heidelberg-Konigstuhl Obs. [024]
2007-04-20 2142-2223, 5 pos. in MPEC 2007-H35, confirmation
Farra d'Isonzo Obs. [595]
2007-04-20 2149-2233, 3 pos. in MPEC 2007-H35, confirmation (I)
Guidestar Obs. [A17]
2007-04-20 2217-2253, 3 pos. in MPEC 2007-H35, confirmation
Great Shefford Obs. [J95]
2007-04-21 0023-0035, 2 pos. in MPEC 2007-H35, confirmation
Farpoint Obs. [734]
2007-04-21 0433-0451, 4 pos. in MPEC 2007-H35, confirmation
Antares Obs. [H55]
2007-04-21 0457-0514, 3 pos. in MPEC 2007-H40, follow-up
Eschenberg Obs. [151]
2007-04-21 2136-2147, 3 pos. in MPEC 2007-H40, follow-up
2001 CP36 (K01C36P) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 62 meters per JPL H=23.70, MPC H=23.7
JPL classifies 2001 CP36 as an Aten and calculates an Earth MOID of 0.011252 AU (4.38 LD).
Lowell Observatory reports 2001 CP36 has an MOID of 0.00201 AU (0.78 LD) with Mercury.
Observations are reported from the following observatories in MPEC 2007-H01:
Mauna Kea [568{2}] coded to David Tholen et al.
2007-03-09 0708-0729, 3 pos. in MPEC 2007-H01, follow-up
2007 HP (K07H00P) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 86 meters per JPL H=22.97, MPC H=22.9
This object has been listed as an impact risk since 18 April 2007.
JPL classifies 2007 HP as an Apollo and calculates an Earth MOID of 0.008684 AU (3.38 LD),
and reports this object passed Earth at 5.4 LD on 13 April 2007 at 1836 UT.
Observations are reported from the following observatories in MPECs 2007-H15, 2007-H23,
2007-H36, and 2007-H40:
Catalina Sky Survey (CSS) [703]
2007-04-18 0656-0842, 8 pos. in MPEC 2007-H15, discovery (*)
Sabino Canyon Obs. [854]
2007-04-18 1033-1036, 4 pos. in MPEC 2007-H15, confirmation
Great Shefford Obs. [J95]
2007-04-18 2142-2158, 3 pos. in MPEC 2007-H23, follow-up
2007-04-22 0125-0132, 2 pos. in MPEC 2007-H40, follow-up
Powell Obs. [649]
2007-04-19 0440-0447, 4 pos. in MPEC 2007-H23, follow-up
Sandlot Obs. [H36]
2007-04-20 0542-0553, 4 pos. in MPEC 2007-H36, follow-up
Eschenberg Obs. [151]
2007-04-20 2120-2138, 3 pos. in MPEC 2007-H36, follow-up
2007-04-21 2100-2119, 5 pos. in MPEC 2007-H40, follow-up
Guidestar Obs. [A17]
2007-04-21 0009-0013, 3 pos. in MPEC 2007-H40, follow-up
2007 DX (K07D00X) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 93 meters per JPL H=22.80, MPC H=22.7
JPL classifies 2007 DX as an Amor and calculates an Earth MOID of 0.213615 AU (83.12 LD).
Lowell Observatory reports 2007 DX has an MOID of 0.95110 AU (370.1 LD) with Jupiter.
Observations are reported from the following observatories in MPECs 2007-H01 and 2007-H11:
Farpoint Obs. [734]
2007-04-15 0448-0513, 3 pos. in MPEC 2007-H01, follow-up
Mt. Lemmon Survey (MLS) [G96]
2007-04-16 0702-0728, 4 pos. in MPEC 2007-H11, follow-up
See also information from the week ending 18 March 2007.
2007 GY1 (K07G01Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 102 meters per JPL H=22.60, MPC H=22.6
JPL classifies 2007 GY1 as an Apollo and calculates an Earth MOID of 0.009241 AU (3.60 LD),
and reports this object passed Earth at 11.9 LD on 3 April 2007.
Lowell Observatory reports 2007 GY1 has an MOID of 0.00187 AU (0.73 LD) with Mars.
Observations are reported from the following observatories in MPECs 2007-H01 and 2007-H11:
Mt. John Obs. [474]
2007-04-14 0923-0931, 3 pos. in MPEC 2007-H01, follow-up
Parma Obs. [A56]
2007-04-14 2121-2148, 3 pos. in MPEC 2007-H01, follow-up
Modra Obs. [118]
2007-04-14 2151-2208, 5 pos. in MPEC 2007-H01, follow-up
Guidestar Obs. [A17]
2007-04-14 2224-2243, 3 pos. in MPEC 2007-H01, follow-up
Farpoint Obs. [734]
2007-04-15 0544-0548, 5 pos. in MPEC 2007-H01, follow-up
KLENOT [246]
2007-04-15 2116-2125, 7 pos. in MPEC 2007-H01, follow-up
2007-04-16 2011-2021, 7 pos. in MPEC 2007-H11, follow-up
Catalina Sky Survey (CSS) [703]
2007-04-16 0530-0553, 4 pos. in MPEC 2007-H11, follow-up
Petit Jean Mountain South Obs. [H45]
2007-04-16 0730-0748, 7 pos. in MPEC 2007-H11, follow-up
Wildberg Obs. [198]
2007-04-16 2049-2059, 5 pos. in MPEC 2007-H11, follow-up
See also information from the week ending 15 April 2007.
2000 SJ344 (K00SY4J) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 103 meters per JPL H=22.59, MPC H=22.6
JPL classifies 2000 SJ344 as an Apollo and calculates an Earth MOID of 0.046056 AU (17.92 LD).
Observations are reported from the following observatories in MPEC 2007-H01:
Mauna Kea [568{2}] coded to David Tholen et al.
2007-03-09 0742-0753, 2 pos. in MPEC 2007-H01, follow-up
See also information from the week ending 31 Dec. 2006.
2007 GU4 (K07G04U) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 106 meters per JPL H=22.53, MPC H=22.5
This object was listed from 15 until 16 April 2007 as an impact risk.
JPL classifies 2007 GU4 as an Apollo and calculates an Earth MOID of 0.017361 AU (6.76 LD),
and reports this object passed Earth at 11.0 LD on 2 April 2007.
Lowell Observatory reports 2007 GU4 has an MOID of 0.01751 AU (6.81 LD) with Venus.
Observations are reported from the following observatories in MPECs 2007-H01, 2007-H11,
2007-H14, and 2007-H40:
Guidestar Obs. [A17]
2007-04-14 1937-2006, 3 pos. in MPEC 2007-H01, follow-up
2007-04-15 1939-2017, 3 pos. in MPEC 2007-H01, follow-up
New Millennium Obs. [A24]
2007-04-14 2029-2045, 5 pos. in MPEC 2007-H01, follow-up
Great Shefford Obs. [J95]
2007-04-15 0253-0310, 3 pos. in MPEC 2007-H01, follow-up
KLENOT [246]
2007-04-15 2104-2112, 7 pos. in MPEC 2007-H01, follow-up
Naef Obs. [A13]
2007-04-15 2216-2318, 3 pos. in MPEC 2007-H01, follow-up
2007-04-17 2018-2103, 3 pos. in MPEC 2007-H14, follow-up
Powell Obs. [649]
2007-04-16 0529-0537, 4 pos. in MPEC 2007-H11, follow-up
Eschenberg Obs. [151]
2007-04-16 1932-2005, 5 pos. in MPEC 2007-H11, follow-up
Pla D'Arguines Obs. [941]
2007-04-21 2244-2256, 5 pos. in MPEC 2007-H40, follow-up
See also information from the week ending 15 April 2007.
2004 HZ (K04H00Z) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 121 meters per JPL H=22.24, MPC H=22.6
This object was listed from 20 April 2004 until 12 April 2007 as an impact risk.
JPL classifies 2004 HZ as an Apollo and calculates an Earth MOID of 0.000003 AU (0.00 LD),
and reports this object will pass Earth at 11.8 LD on 25 April 2007.
Observations are reported from the following observatories in MPECs 2007-H11 and 2007-H18:
Spacewatch 0.9m telescope [691]
2007-04-14 0839-0930, 2 pos. in MPEC 2007-H18, follow-up (tH)
2007-04-18 0915-1006, 3 pos. in MPEC 2007-H18, follow-up (t)
LINEAR [704]
2007-04-16 0840-0933, 5 pos. in MPEC 2007-H11, follow-up
See also information from the week ending 15 April 2007.
2007 CQ5 (K07C05Q) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 130 meters per JPL H=22.08, MPC H=22.1
This object was listed from 8 until 11 Feb. 2007 as an impact risk.
JPL classifies 2007 CQ5 as an Amor and calculates an Earth MOID of 0.115339 AU (44.88 LD).
Lowell Observatory reports 2007 CQ5 has an MOID of 0.03180 AU (12.37 LD) with Mars.
Observations are reported from the following observatories in MPEC 2007-H11:
Petit Jean Mountain South Obs. [H45]
2007-04-16 0929-0941, 7 pos. in MPEC 2007-H11, follow-up
See also information from the week ending 15 April 2007.
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of 17 small objects were reported during the last 48 hours:
2000 SJ344, 2001 CP36, 2004 HZ, 2007 CQ5, 2007 DX, 2007 FJ1, 2007 GU1, 2007 GU4,
2007 GX5, 2007 GY1, 2007 GY5, 2007 HC, 2007 HL4, 2007 HP, 2007 HV4, 2007 HW4
& 2007 HY3
in MPECs:
2007-H01 time-stamped 2007 Apr. 16, 06:06 UT - Daily Orbit Update
2007-H04 time-stamped 2007 Apr. 16, 09:43 UT - 2007 GX5
2007-H05 time-stamped 2007 Apr. 16, 09:46 UT - 2007 GY5
2007-H10 time-stamped 2007 Apr. 16, 23:18 UT - 2007 HC
2007-H11 time-stamped 2007 Apr. 17, 06:08 UT - Daily Orbit Update
2007-H14 time-stamped 2007 Apr. 18, 06:07 UT - Daily Orbit Update
2007-H15 time-stamped 2007 Apr. 18, 10:59 UT - 2007 HP
2007-H18 time-stamped 2007 Apr. 19, 06:08 UT - Daily Orbit Update
2007-H21 time-stamped 2007 Apr. 19, 11:15 UT - 2007 HY3
2007-H23 time-stamped 2007 Apr. 20, 06:08 UT - Daily Orbit Update
2007-H24 time-stamped 2007 Apr. 20, 15:28 UT - 2007 HL4
2007-H34 time-stamped 2007 Apr. 21, 03:32 UT - 2007 HV4
2007-H35 time-stamped 2007 Apr. 21, 05:24 UT - 2007 HW4
2007-H36 time-stamped 2007 Apr. 21, 06:07 UT - Daily Orbit Update
2007-H40 time-stamped 2007 Apr. 22, 06:07 UT - Daily Orbit Update
Date & times for other sources that were parsed to compile this page:
JPL Close Approaches, downloaded at 2007 April 22, 2359 UTC
JPL NEO Orbital Elements, downloaded at 2007 April 22, 1456 UTC
Lowell Observatory Orbit intersections, time-stamped 2007 Apr 19 1828:15 UTC
MPC NEA.DAT from MPC mirror, downloaded at 2007 April 22, 1442 UTC
Risk monitoring sites, as of A/CC's check at 2007 April 22, 1910 UTC (see CRT page)
Some observation sets have MPEC codes in parentheses, such as (*) denoting discovery.
Viewing Opportunities for Small Objects [ news | size order | alpha order | top ]
This compilation shows 25 small objects as being currently in view,
including 11 not reported in the last seven days.
Viewing by date order - see this list also by designation order
Object View until MOID AU Dia H Arc Notes (calc date)
---------- ---------- -------- --- ----- --- - -----------------------
2007 HV4 2007-04-24 0.003615 6 28.70 2 - (22 April)
2004 RE84 2007-04-26 0.019895 132 22.05 28 - bright recov. poss. (10 Feb.)
2007 HC 2007-04-28 0.003255 29 25.30 4 - was risk listed (21 April)
2007 GX5 2007-04-30 0.013314 47 24.30 2 - (17 April)
2004 HZ 2007-05-01 0.000003 121 22.24 2op - was risk listed (19 April)
2007 HW4 2007-05-01 0.014683 61 23.72 2 - (22 April)
2002 FT6 2007-05-02 0.041002 120 22.26 3op - very faint (2 April)
2006 KK89 2007-05-03 0.101248 109 22.46 2 - faint recov. poss., past obs. (10 Feb.)
2007 GY5 2007-05-03 0.075484 55 23.95 4 - (20 April)
2007 DX 2007-05-04 0.213615 93 22.80 58 - (17 April)
1995 SB 2007-05-05 0.279024 123 22.20 12 - faint recov. poss. (3 Jan.)
2003 WW26 2007-05-05 0.011964 122 22.21 23 - was risk listed, faint recov. poss. (10 Feb.)
2007 HY3 2007-05-05 0.042339 26 25.56 1 - (19 April)
2007 HP 2007-05-06 0.008684 86 22.97 4 - risk listed (22 April)
2007 GY1 2007-05-11 0.009241 102 22.60 6 - (17 April)
2007 GU4 2007-05-12 0.017361 106 22.53 8 - was risk listed (22 April)
2007 EC 2007-05-13 0.024230 122 22.22 41 - past obs. (13 April)
2000 UY33 2007-05-16 0.118567 133 22.03 144 - faint recov. poss. (10 Feb.)
2007 FJ1 2007-05-19 0.092173 57 23.88 34 - (21 April)
2000 HO40 2007-05-20 0.039459 124 22.19 10 - faint recov. poss. (10 Feb.)
2007 BC8 2007-05-26 0.039473 119 22.28 49 - past obs. (14 March)
2007 EO 2007-06-09 0.039430 94 22.78 23 - past obs. (3 April)
2007 HL4 2007-06-20 0.032584 49 24.20 1 - (20 April)
2007 CQ5 2007-06-23 0.115339 130 22.08 68 - was risk listed (17 April)
2006 SY5 2007-09-15 0.104669 129 22.10 62 - past obs. (2 April)
Coming into view soon:
2004 KH17 2007-06-28 0.00379 129 22.1 16 - >28 April, faint recov. poss. (2 April)
Viewing by designation order - see also Viewing by date order
Object View until MOID AU Dia H Arc Notes (calc date)
---------- ---------- -------- --- ----- --- - -----------------------
2007 HW4 2007-05-01 0.014683 61 23.72 2 - (22 April)
2007 HV4 2007-04-24 0.003615 6 28.70 2 - (22 April)
2007 HL4 2007-06-20 0.032584 49 24.20 1 - (20 April)
2007 HY3 2007-05-05 0.042339 26 25.56 1 - (19 April)
2007 HP 2007-05-06 0.008684 86 22.97 4 - risk listed (22 April)
2007 HC 2007-04-28 0.003255 29 25.30 4 - was risk listed (21 April)
2007 GY5 2007-05-03 0.075484 55 23.95 4 - (20 April)
2007 GX5 2007-04-30 0.013314 47 24.30 2 - (17 April)
2007 GU4 2007-05-12 0.017361 106 22.53 8 - was risk listed (22 April)
2007 GY1 2007-05-11 0.009241 102 22.60 6 - (17 April)
2007 FJ1 2007-05-19 0.092173 57 23.88 34 - (21 April)
2007 EO 2007-06-09 0.039430 94 22.78 23 - past obs. (3 April)
2007 EC 2007-05-13 0.024230 122 22.22 41 - past obs. (13 April)
2007 DX 2007-05-04 0.213615 93 22.80 58 - (17 April)
2007 CQ5 2007-06-23 0.115339 130 22.08 68 - was risk listed (17 April)
2007 BC8 2007-05-26 0.039473 119 22.28 49 - past obs. (14 March)
2006 SY5 2007-09-15 0.104669 129 22.10 62 - past obs. (2 April)
2006 KK89 2007-05-03 0.101248 109 22.46 2 - faint recov. poss., past obs. (10 Feb.)
2004 RE84 2007-04-26 0.019895 132 22.05 28 - bright recov. poss. (10 Feb.)
2004 KH17 2007-06-28 0.00379 129 22.1 16 - >28 April, faint recov. poss. (2 April)
2004 HZ 2007-05-01 0.000003 121 22.24 2op - was risk listed (19 April)
2003 WW26 2007-05-05 0.011964 122 22.21 23 - was risk listed, faint recov. poss. (10 Feb.)
2002 FT6 2007-05-02 0.041002 120 22.26 3op - very faint (2 April)
2000 UY33 2007-05-16 0.118567 133 22.03 144 - faint recov. poss. (10 Feb.)
2000 HO40 2007-05-20 0.039459 124 22.19 10 - faint recov. poss. (10 Feb.)
1995 SB 2007-05-05 0.279024 123 22.20 12 - faint recov. poss. (3 Jan.)
Out-of-view date based on MPES solar elongation <40° and/or magnitude V>22.0 at 1200 UT
geocentric. (Not factored in is any lunar interference with viewing.)
Objects are linked in the left-most column only if observed in the last seven days,
while objects with earlier small-object reporting are linked under "Notes."
Diameter ("Dia") is in meters, a very rough estimate from brightness (H).
Observing "Arc" is from MPES in days or number of oppositions.
"In view" does not necessarily mean locatable for objects with short arcs in prior years
and for which a large search or accidental rediscovery are the best hopes.
Small object observation cross index [ size order | 48 Hours | viewing | top ]
| Object | Observed by MPC code |
|---|
| 2000 SJ344 | 568 |
| 2001 CP36 | 568 |
| 2004 HZ | 691, 704 |
| 2007 CQ5 | H45 |
| 2007 DX | 734, G96 |
| 2007 FJ1 | H55 |
| 2007 GU1 | 152, 246, 703, 734, A48, A56, B30, G96, J95 |
| 2007 GU4 | 151, 246, 649, 941, A13, A17, A24, J95 |
| 2007 GX5 | 024, 113, 246, 473, 649, 703, 854, G96, H36, H55, J95 |
| 2007 GY1 | 118, 198, 246, 474, 703, 734, A17, A56, H45 |
| 2007 GY5 | 246, 649, G96, H55, J95 |
| 2007 HC | 246, 291, E12, H36, J95 |
| 2007 HL4 | 595, 854, G96, H36, J95 |
| 2007 HP | 151, 649, 703, 854, A17, H36, J95 |
| 2007 HV4 | 246, G96, J95 |
| 2007 HW4 | 024, 151, 246, 595, 734, A17, G96, H55, J95 |
| 2007 HY3 | G96 |
|
| Code | Observatory | Objects Observed |
|---|
| 024 | Heidelberg-Konigstuhl Obs. | 2007 GX5, 2007 HW4 |
| 113 | Drebach Obs. | 2007 GX5 |
| 118 | Modra Obs. | 2007 GY1 |
| 151 | Eschenberg Obs. | 2007 GU4, 2007 HP, 2007 HW4 |
| 152 | Moletai Obs. | 2007 GU1 |
| 198 | Wildberg Obs. | 2007 GY1 |
| 246 | KLENOT | 2007 GU1, 2007 GU4, 2007 GX5, 2007 GY1, 2007 GY5, 2007 HC, 2007 HV4, 2007 HW4 |
| 291 | Spacewatch 1.8m telescope | 2007 HC |
| 473 | Remanzacco Obs. | 2007 GX5 |
| 474 | Mt. John Obs. | 2007 GY1 |
| 5682 | Mauna Kea - David Tholen et al. | 2000 SJ344, 2001 CP36 |
| 595 | Farra d'Isonzo Obs. | 2007 HL4, 2007 HW4 |
| 649 | Powell Obs. | 2007 GU4, 2007 GX5, 2007 GY5, 2007 HP |
| 691 | Spacewatch 0.9m telescope | 2004 HZ |
| 703 | Catalina Sky Survey | 2007 GU1, 2007 GX5, 2007 GY1, 2007 HP |
| 704 | LINEAR | 2004 HZ |
| 734 | Farpoint Obs. | 2007 DX, 2007 GU1, 2007 GY1, 2007 HW4 |
| 854 | Sabino Canyon Obs. | 2007 GX5, 2007 HL4, 2007 HP |
| 941 | Pla D'Arguines Obs. | 2007 GU4 |
| A13 | Naef Obs. | 2007 GU4 |
| A17 | Guidestar Obs. | 2007 GU4, 2007 GY1, 2007 HP, 2007 HW4 |
| A24 | New Millennium Obs. | 2007 GU4 |
| A48 | Verona Obs. | 2007 GU1 |
| A56 | Parma Obs. | 2007 GU1, 2007 GY1 |
| B30 | Szamotuly-Galowo Obs. | 2007 GU1 |
| E12 | Siding Spring Survey | 2007 HC |
| G96 | Mt. Lemmon Survey | 2007 DX, 2007 GU1, 2007 GX5, 2007 GY5, 2007 HL4, 2007 HV4, 2007 HW4, 2007 HY3 |
| H36 | Sandlot Obs. | 2007 GX5, 2007 HC, 2007 HL4, 2007 HP |
| H45 | Petit Jean Mtn. South Obs. | 2007 CQ5, 2007 GY1 |
| H55 | Antares Obs. | 2007 FJ1, 2007 GX5, 2007 GY5, 2007 HW4 |
| J95 | Great Shefford Obs. | 2007 GU1, 2007 GU4, 2007 GX5, 2007 GY5, 2007 HC, 2007 HL4, 2007 HP, 2007 HV4, 2007 HW4 |
|
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