Earth's temporary and apparently natural satellite, tiny asteroid 6R10DB9, was caught again by Peter Birtwhistle late on June 15th. Two positions are seen here from an animation, each from a stack of 20 four-second exposures. The object is moving 47"/min. downward. Scale is 2.14"/pixel and north is up. The astrometry from that observing session and a session last night are reported in DASOs 106 and 107. Imagery copyright Great Shefford Observatory, where you will find more details and the animation. See also news on June 3rd.
JPL indicates that Goldstone in southern California succeeded in observing 6R10DB9 with radar. See the 6R10DB9 Planning page for more about that effort.
Contents on 19 June '07
- Minor-Object News -- two items
- Minor-Object Science -- one paper
- IAU Minor Planet Center
- Impact Risk Monitoring -- two objects reported
WELCOME to A/CC's prototype daily news publication designed to be the viewing end of a planned autonomous 24-hour news service. The new tools and this publication format are working well enough now to share with readers. It is expected that this approach will require less time to maintain than our previous news and small asteroid pages, which were retired on May 14th. There's still more development ahead and there probably will be some glitches along the way, but this is what's needed to keep up with the increasing pace of minor-object news. The CRT page will be maintained separately for a little while longer, until all of this is working smoothly. And the CRT and small-asteroid ephemerides will be kept going.
Minor-Object News on 19 June '07
- "NASA Asteroid Report: Picking Over the Bones of Contention," LiveScience.com 19 June - Quote: "Turns out ... the NASA NEO study group had received secret input that can't be discussed, making the nuclear option doable ... for deflecting even the smallest NEOs."
- "Dawn ELV status report," NASA KSC 18 June - Quote: "Over the weekend, Dutch Space personnel completed the solar array repair on Dawn as planned and spacecraft processing continues on schedule. Dawn will be mated to its associated upper-stage booster on Thursday and transported to Pad 17-B at Cape Canaveral Air Force Station for mating to the Delta II on June 27."
Minor-Object Science on 19 June '07
- "Dust crystallinity in protoplanetary disks: the effect of diffusion/viscosity ratio" by Pavlyuchenkov, Ya. with C.P. Dullemond, abstract & PDF at arXiv.org 19 June - Quote: "The process of turbulent radial mixing in protoplanetary disks has strong relevance to the analysis of the spatial distribution of crystalline dust species in disks around young stars and to studies of the composition of meteorites and comets in our own solar system."
NEOCP Activity on 19 June '07
The MPC's NEO Confirmation Page has 3 listings: 3 new
When last checked at 1703 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new listings. All of these were "one nighters."
New MPECs on 19 June '07
Minor Planet Electronic Circulars
As of last check at 1703 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K07L19Q 2007 LQ19 (Q=4.049 AU, arc=4 days, H=17.9 ~891m) from Grasslands Obs. (June 15.44p4)
- K07L15B 2007 LB15 (arc=6 days, H=19.0 ~537m) from Astronomical Research Obs. (ARO) (June 18.33-35p10), the Spacewatch 1.8m telescope (June 18.37-38p3), and Wildberg Obs. (June 18.97p4)
- Observations of small asteroids (H>22.0)
- K07M00Q 2007 MQ (Q=4.264 AU, arc=1 day, H=23.7 ~62m) from Jim Young via Table Mtn. Obs. (June 19.17-19p4)
- K07M00F 2007 MF (arc=2 days, H=26.2 ~19m) from Grasslands Obs. (June 18.18p2)
- K07L19T 2007 LT19 (arc=4 days, H=25.4 ~28m) from Andrushivka Obs. (June 15.84-85p6) and Great Shefford Obs. (June 18.97p3)
- Observations of other objects
- K07M00H 2007 MH (arc=1 day, H=20.9 ~224m) from Grasslands Obs. (June 18.35-36p4)
- K07M00G 2007 MG (arc=1 day, H=20.9 ~224m) from ARO (June 18.15p4) and Grasslands Obs. (June 18.23-24p3)
- K07L00L 2007 LL (arc=10 days, H=20.4 ~282m) from the Catalina Sky Survey (CSS) (June 16.20-22p4) and ARO (June 18.12-14p6)
- K07H59A 2007 HA59 (i=54.9°, Q=4.331 AU, arc=2 opp, H=15.0 ~3.39 km, q=0.685 AU) from ARO (June 18.13-14p3)
- K07F42V 2007 FV42 (arc=88 days, H=17.8 ~933m) from Nazaret Obs. (June 13.93-94p5)
- K07F01K 2007 FK1 (arc=93 days, H=20.2 ~309m) from CSS (June 18.37-39p3)
- K07B50B 2007 BB50 (Q=4.885 AU, arc=85 days, H=18.5 ~676m) from New Millennium Obs. (Feb. 20.01-02p2 & 20.86-95p6)
- K06X00A 2006 XA (arc=199 days, H=17.4 ~1.12 km) from ARO (June 18.32-33p6)
- K06WC7O 2006 WO127 (arc=2 opp, H=16.1 ~2.04 km, q=0.993 AU) from the Spacewatch 0.9m telescope (June 18.24-28p3)
- K06V13Y 2006 VY13 (Q=4.764 AU, arc=219 days, H=17.3 ~1.17 km) from ARO (June 18.16-17p6)
- K06SD4J 2006 SJ134 (arc=2 opp, H=18.0 ~851m) from New Millennium Obs. (Feb. 20.00-03p2 & 20.85-93p5)
- K06G00B 2006 GB (arc=2 opp, H=20.3 ~295m) from ARO (June 18.20-22p5)
- K05N44W 2005 NW44 (arc=2 opp, H=20.4 ~282m) from Baldwin Lake Obs. (June 18.27p1 & 18.34-41p7)
- K05J22A 2005 JA22 (arc=2 opp, H=18.4 ~708m) from ARO (June 18.30-31p2)
- K02T60D 2002 TD60 (arc=2 opp, H=19.3 ~467m) from New Millennium Obs. (Feb. 18.94p1 & 20.88-92p3)
- K02A31V 2002 AV31 (arc=3 opp, H=20.5 ~269m) from ARO (June 18.35-37p3)
- K02A03Q 2002 AQ3 (i=40.0°, arc=4 opp, H=17.1 ~1.29 km) from CSS (June 18.37-39p4)
- K02A02C 2002 AC2 (i=58.9°, arc=4 opp, H=16.5 ~1.70 km) from CSS (June 18.40-42p4)
- K01SH0E 2001 SE170 (arc=3 opp, H=18.2 ~776m) from CSS (June 18.27-29p4)
- K00P09P 2000 PP9 (arc=2 opp, H=19.3 ~467m) from ARO (June 18.15-17p3)
- K00K43W 2000 KW43 (arc=2 opp, H=20.0 ~339m) from ARO (June 18.18-19p4)
- J99V06O 1999 VO6 (i=40.1°, q=0.297 AU, arc=8 opp, H=17.0 ~1.35 km) from the SZTE Asteroid Program (SZTE) (June 19.03-04p3)
- J99J03U 1999 JU3 (arc=4 opp, H=19.4 ~446m) from Spacewatch 1.8m (June 18.39-42p3)
- J98Q52Q 1998 QQ52 (arc=3 opp, H=20.7 ~245m) from David Tholen's team on Mauna Kea (June 15.29p2 at R=22.5-6)
- F5341 155341 2006 SA218 from New Millennium Obs. (Feb. 20.01-03p2 & 20.85-90p4)
- F2895 152895 2000 CQ101 from New Millennium Obs. (Feb. 19.99-01p2 & 20.87-93p5)
- E3381 143381 2003 BC21 from New Millennium Obs. (Feb. 20.00-03p2 & 20.86-87p2)
- 53435 53435 1999 VM40 from New Millennium Obs. (Feb. 20.02-04p2 & 20.86-92p5)
- 23183 23183 2000 OY21 from ARO (June 18.33-34p2)
- 09162 9162 1987 OA from ARO (June 18.27-28p3)
- 07977 7977 1977 QQ5 from CSS (June 18.43-44p4)
- 05693 5693 1993 EA from New Millennium Obs. (Feb. 20.01-03p2 & 20.86-91p4)
- 05646 5646 1990 TR from New Millennium Obs. (Feb. 19.93-95p2)
- 05626 5626 1991 FE from New Millennium Obs. (Feb. 19.00-03p2 & 20.87-90p3)
- 04544 4544 Xanthus (1989 FB) from New Millennium Obs. (Feb. 20.02-03p2 & 20.93-94p2)
- 03551 3551 Verenia (1983 RD) from Spacewatch 0.9m (June 18.24-28p3)
- 03103 3103 Eger (1982 BB) from New Millennium Obs. (Feb. 20.01-02p2 & 20.86-91p4)
- 02212 2212 Hephaistos (1978 SB) from New Millennium Obs. (Feb. 19.91-93p2 & 20.80-88p6)
- 01943 1943 Anteros (1973 EC) from New Millennium Obs. (Feb. 19.91-92p2 & 20.81-85p4)
- 01866 1866 Sisyphus (1972 XA) from New Millennium Obs. (Feb. 19.95-96p2 & 20.80-88p6)
- 01627 1627 Ivar (1929 SH) from New Millennium Obs. (Feb. 19.95-97p2 & 20.80-89p5)
Observers on 19 June '07
Fourteen observing facilities appear in today's MPECs.
|A50||Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-M15 -- 2007 LT19|
|H55||Astronomical Research Obs. in Illinois, 13 in MPEC 2007-M15 -- 2007 LB15, 2007 MG, 2007 LL, 2007 HA59, 2006 XA, 2006 VY13, 2006 GB, 2005 JA22, 2002 AV31, 2000 PP9, 2000 KW43, 23183, 9162|
|G77||Baldwin Lake Obs. in southern California, 1 in MPEC 2007-M15 -- 2005 NW44|
|703||Catalina Sky Survey in Arizona, 6 in MPEC 2007-M15 -- 2007 LL, 2007 FK1, 2002 AQ3, 2002 AC2, 2001 SE170, 7977|
|651||Grasslands Obs. in Arizona, 4 in MPEC 2007-M15 -- 2007 LQ19, 2007 MF, 2007 MH, 2007 MG|
|J95||Great Shefford Obs. in England, 1 in MPEC 2007-M15 -- 2007 LT19|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2007-M15 -- 1998 QQ52|
|J47||Nazaret Obs. in Spain, 1 in MPEC 2007-M15 -- 2007 FV42|
|A24||New Millennium Obs. in Italy, 16 in MPEC 2007-M15 -- 2007 BB50, 2006 SJ134, 2002 TD60, 155341, 152895, 143381, 53435, 5693, 5646, 5626, 4544, 3103, 2212, 1943, 1866, 1627|
|461||SZTE Asteroid Program in Hungary, 1 in MPEC 2007-M15 -- 1999 VO6|
|691||Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2007-M15 -- 2006 WO127, 3551|
|291||Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-M15 -- 2007 LB15, 1999 JU3|
|6735||Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-M15 -- 2007 MQ|
|198||Wildberg Obs. in Germany, 1 in MPEC 2007-M15 -- 2007 LB15|
Impact Risk Monitoring on 19 June '07
Notes for Today's Latest Risk Assessments
|2007 LQ19||NEODyS||1254||2011-2079||17||2.26e-06||-1.97||-2.58||0||NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2007/06/13.788 to 2007/06/17.392."|
|JPL||1253||2011-2105||39||2.8e-06||-1.93||-2.53||0||JPL: "Analysis based on 14 observations spanning 3.6040 days (2007-Jun-13.78733 to 2007-Jun-17.39138)." Diameter approximately 0.861 km. from mean, weighted H=18.0.|
|2007 LB15||NEODyS||1254||2024-2078||10||6.82e-08||-3.53||-3.60||0||NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/06/13.347 to 2007/06/18.975."|
|JPL||1253||2024-2094||9||1.2e-07||-3.35||-3.44||0||JPL: "Analysis based on 41 observations spanning 5.6271 days (2007-Jun-13.3467 to 2007-Jun-18.97376)." Diameter approximately 0.614 km. from mean, weighted H=18.7.|
For a list of all risk-rated objects recently in view, see our ephemerides page.
An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from an orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" for more about all this.
Chronology on 19 June '07
Times are UTC for when the items were noted by Major News.
|1500||Added link to news story, "NASA Asteroid Report: Picking Over the Bones of Contention"|
|1300||Added MOS paper, "Dust crystallinity in protoplanetary disks: the effect of diffusion/viscosity ratio" - see above|
Added link to news story, "Dawn ELV status report"
|1254||Noted that NEODyS has updated its 2007 LB15 risk assessment - see above|
Noted that NEODyS has updated its 2007 LQ19 risk assessment - see above
|1253||Noted that JPL has updated its 2007 LB15 risk assessment - see above|
Noted that JPL has updated its 2007 LQ19 risk assessment - see above
Grabbed MPEC 2007-M15 - Daily Orbit Update - see above