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Earth's Busy Neighborhood

    ACC's Small Object Report for 2 to 8 April 2007    

A semi-automated report compiled on 9 April 2007 at 1424 UTC

Six small asteroids were reported in the last 192 hours, during which none were newly discovered.
Currently 1,291 NEAs are listed with H>22.0 by JPL and/or the MPC (1,109 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 ]

Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2007 EE26 (K07E26E) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 21 meters per JPL H=26.06, MPC H=26.1 This object has been listed as an impact risk since 4 April 2007. JPL classifies 2007 EE26 as an Apollo and calculates an Earth MOID of 0.005878 AU (2.29 LD), and reports this object passed Earth at 8.1 lunar distances (LD) on 18 Feb. 2007 at about 1908 UT. Lowell Observatory reports 2007 EE26 has an MOID of 0.00542 AU (2.11 LD) with Mars. Observations are reported from the following observatories in MPEC 2007-G11: Southern African Large Telescope (SALT) [B31] 2007-03-13 2041-2248, 12 pos. in MPEC 2007-G11, follow-up See also information from the week ending 18 March 2007. 2007 FY20 (K07F20Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 37 meters per JPL H=24.80, MPC H=24.8 This object has been listed as an impact risk since 27 March 2007. JPL classifies 2007 FY20 as an Apollo and calculates an Earth MOID of 0.001774 AU (0.69 LD), and reports this object passed Earth at 5.3 LD on 2 April 2007 at 2251 UT. Lowell Observatory reports 2007 FY20 has an MOID of 0.01341 AU (5.22 LD) with Mars. Observations are reported from the following observatories in MPECs 2007-G02 and 2007-G03: BlackBird Obs. [H08] 2007-04-01 0310-0326, 3 pos. in MPEC 2007-G02, follow-up Great Shefford Obs. [J95] 2007-04-01 1955-2053, 6 pos. in MPEC 2007-G03, follow-up See also information from the week ending 1 April 2007. 2007 FJ1 (K07F01J) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 55 meters per JPL H=23.93, MPC H=23.9 JPL classifies 2007 FJ1 as an Amor and calculates an Earth MOID of 0.092092 AU (35.83 LD), and reports this object passed Earth at 36.3 LD on 23 March 2007. Observations are reported from the following observatories in MPEC 2007-G12: Great Shefford Obs. [J95] 2007-04-05 0123-0136, 2 pos. in MPEC 2007-G12, follow-up See also information from the week ending 1 April 2007. 2007 EO (K07E00O) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 94 meters per JPL H=22.78, MPC H=22.8 JPL classifies 2007 EO as an Amor and calculates an Earth MOID of 0.039430 AU (15.34 LD), and reports this object passed Earth at 20.7 LD on 17 March 2007. Observations are reported from the following observatories in MPEC 2007-G03: NEAT's Mt. Palomar telescope [644] 2007-04-01 1156-1227, 3 pos. in MPEC 2007-G03, follow-up See also information from the week ending 1 April 2007. 2007 EN26 (K07E26N) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 109 meters per JPL H=22.46, MPC H=22.5 JPL classifies 2007 EN26 as an Apollo and calculates an Earth MOID of 0.014989 AU (5.83 LD), and reports this object passed Earth at 14.4 LD on 30 March 2007. Observations are reported from the following observatories in MPEC 2007-G13: Catalina Station [693] 2007-03-29 1027-1028, 3 pos. in MPEC 2007-G13, follow-up See also information from the week ending 1 April 2007. 2007 CQ5 (K07C05Q) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 128 meters per JPL H=22.12, 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 0.115328 AU (44.87 LD). Lowell Observatory reports 2007 CQ5 has an MOID of 0.03179 AU (12.37 LD) with Mars. Observations are reported from the following observatories in MPECs 2007-G02 and 2007-G13: Desert Moon Obs. [448] 2007-04-01 0652-0713, 3 pos. in MPEC 2007-G02, follow-up Naef Obs. [A13] 2007-04-05 2256-2336, 3 pos. in MPEC 2007-G13, follow-up See also information from the week ending 1 April 2007.
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of six small objects were reported during the last 168 hours: 2007 CQ5, 2007 EE26, 2007 EN26, 2007 EO, 2007 FJ1 & 2007 FY20 in MPECs: 2007-G02 time-stamped 2007 Apr. 2, 06:08 UT - Daily Orbit Update 2007-G03 time-stamped 2007 Apr. 3, 06:06 UT - Daily Orbit Update 2007-G11 time-stamped 2007 Apr. 4, 06:06 UT - Daily Orbit Update 2007-G12 time-stamped 2007 Apr. 5, 06:05 UT - Daily Orbit Update 2007-G13 time-stamped 2007 Apr. 6, 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 8, 1440 UTC JPL NEO Orbital Elements, downloaded at 2007 April 8, 1446 UTC Lowell Observatory Orbit intersections, time-stamped 2007 Apr 07 2039:11 UTC MPC NEA.DAT from MPC mirror, downloaded at 2007 April 8, 1439 UTC Risk monitoring sites, as of A/CC's check at 2007 April 8, 2359 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 22 small objects as being currently in view, including 18 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 DX60 2007-04-11 0.204320 119 22.28 33 - past obs. (27 March) 2007 FG1 2007-04-12 0.022139 43 24.47 7 - past obs. (24 March) 2007 EN26 2007-04-13 0.014989 109 22.46 17 - (6 April) 2007 FO3 2007-04-16 0.040957 42 24.52 1 - past obs. (22 March) 2007 FQ3 2007-04-16 0.060338 25 25.65 2 - was risk listed, past obs. (22 March) 2005 GR33 2007-04-17 0.011936 132 22.04 12 - faint recov. poss. (10 Feb.) 2006 YD12 2007-04-19 0.044509 101 22.63 60 - past obs. (22 Feb.) 2002 EW8 2007-04-19 0.042484 69 23.46 2op - past obs. (21 March) 2006 BA9 2007-04-20 0.072674 91 22.86 32 - faint recov. poss., past obs. (10 Feb.) 2004 RE84 2007-04-26 0.019895 132 22.05 28 - bright recov. poss. (10 Feb.) 2004 HZ 2007-04-28 0.000110 121 22.24 18 - risk listed, faint recov. poss. (10 Feb.) 2007 DX 2007-04-30 0.213746 87 22.95 25 - past obs. (15 March) 2006 KK89 2007-05-03 0.101248 109 22.46 2 - faint recov. poss., past obs. (10 Feb.) 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 EC 2007-05-13 0.024188 122 22.21 14 - past obs. (24 March) 2000 UY33 2007-05-16 0.118567 133 22.03 144 - faint recov. poss. (10 Feb.) 2007 FJ1 2007-05-19 0.092092 55 23.93 19 - (5 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 - (3 April) 2007 CQ5 2007-06-23 0.115328 128 22.12 57 - was risk listed (6 April) Coming into view soon: 2006 SY5 2007-09-15 0.104669 129 22.10 62 - >12 April, past obs. (2 April) Viewing by designation order - see also Viewing by date order Object View until MOID AU Dia H Arc Notes (calc date) ---------- ---------- -------- --- ----- --- - ----------------------- 2007 FQ3 2007-04-16 0.060338 25 25.65 2 - was risk listed, past obs. (22 March) 2007 FO3 2007-04-16 0.040957 42 24.52 1 - past obs. (22 March) 2007 FJ1 2007-05-19 0.092092 55 23.93 19 - (5 April) 2007 FG1 2007-04-12 0.022139 43 24.47 7 - past obs. (24 March) 2007 EN26 2007-04-13 0.014989 109 22.46 17 - (6 April) 2007 EO 2007-06-09 0.039430 94 22.78 23 - (3 April) 2007 EC 2007-05-13 0.024188 122 22.21 14 - past obs. (24 March) 2007 DX60 2007-04-11 0.204320 119 22.28 33 - past obs. (27 March) 2007 DX 2007-04-30 0.213746 87 22.95 25 - past obs. (15 March) 2007 CQ5 2007-06-23 0.115328 128 22.12 57 - was risk listed (6 April) 2007 BC8 2007-05-26 0.039473 119 22.28 49 - past obs. (14 March) 2006 YD12 2007-04-19 0.044509 101 22.63 60 - past obs. (22 Feb.) 2006 SY5 2007-09-15 0.104669 129 22.10 62 - >12 April, past obs. (2 April) 2006 KK89 2007-05-03 0.101248 109 22.46 2 - faint recov. poss., past obs. (10 Feb.) 2006 BA9 2007-04-20 0.072674 91 22.86 32 - faint recov. poss., past obs. (10 Feb.) 2005 GR33 2007-04-17 0.011936 132 22.04 12 - faint recov. poss. (10 Feb.) 2004 RE84 2007-04-26 0.019895 132 22.05 28 - bright recov. poss. (10 Feb.) 2004 HZ 2007-04-28 0.000110 121 22.24 18 - risk listed, faint recov. poss. (10 Feb.) 2003 WW26 2007-05-05 0.011964 122 22.21 23 - was risk listed, faint recov. poss. (10 Feb.) 2002 EW8 2007-04-19 0.042484 69 23.46 2op - past obs. (21 March) 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 ]
ObjectObserved by MPC code
2007 CQ5448, A13
2007 EE26B31
2007 EN26693
2007 EO644
2007 FJ1J95
2007 FY20H08, J95
CodeObservatoryObjects Observed
448Desert Moon Obs. 2007 CQ5
644NEAT's Mt. Palomar telescope 2007 EO
693Catalina Station 2007 EN26
A13Naef Obs. 2007 CQ5
B31Southern African Large Telescope 2007 EE26
H08BlackBird Obs. 2007 FY20
J95Great Shefford Obs. 2007 FJ1, 2007 FY20
[ object listings | index | 48 Hours | viewing | top ]

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