2010-01-07 Tracking News

Contents on 7 January '10

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- six listings: 1 new, 5 updated
- New MPECs -- nine MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- four objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
News image catalog
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

Radar Astrometry on 7 January '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 0302 UTC when the database was dated 6 Jan.

2004 XP14 from Goldstone DSS-14 70m antenna transmit with Goldstone DSS-13 34m antenna receive (2006 July 3.37 velocity, 4.35 velocity & 6.24 velocity)

NEOCP Activity on 7 January '10

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of thirteen listings on the NEOCP at some point today.

New MPECs on 7 January '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-A24 time-stamped "07:11 UT" - Daily Orbit Update - see below
MPEC 2010-A25 time-stamped "16:01 UT" - 2009 BE77 - see below
MPEC 2010-A26 time-stamped "17:16 UT" - 2010 AH - see below
MPEC 2010-A27 time-stamped "17:20 UT" - 2010 AJ - see below
MPEC 2010-A28 time-stamped "17:29 UT" - 2010 AK - see below
MPEC 2010-A29 time-stamped "17:33 UT" - 2010 AL - see below
MPEC 2010-A30 time-stamped "20:58 UT" - 2010 AR1 - see below
MPEC 2010-A31 time-stamped "22:52 UT" - Comet C/2010 A1 (Hill) - see below
MPEC 2010-A32 time-stamped "23:29 UT" - Comet P/2010 A2 (LINEAR)

MPEC 2010-A32 - "23:29 UT" - Comet P/2010 A2 (LINEAR)

PK10A020 P/2010 A2 (LINEAR) (q=1.358 AU, Q=6.078 AU, TP=2010 May 7.565 TT) from LINEAR (Jan. 6.27-31p3), Great Shefford Obs. (Jan. 6.98-00p3 & 7.84-87p3), Magdalena Ridge Obs. (MRO) (Jan. 7.20-29p6), RAS Obs. Mayhill (Jan. 7.20-22p2), the Mt. Lemmon Survey (MLS) (Jan. 7.32-34p4), and Ageo Obs. (Jan. 7.66-67p2)

MPEC 2010-A31 - "22:52 UT" - Comet C/2010 A1 (Hill)

CK10A010 C/2010 A1 (Hill) (i=11.8°, q=1.020 AU, TP=2010 June 24.055 TT) from the Catalina Sky Survey (CSS) (Jan. 6.46-50p7 & 7.24-25p4), MLS (Jan. 6.53p4), Moriyama Obs. (Jan. 6.61-62p2), Great Shefford Obs. (Jan. 7.07-09p2), RAS Mayhill (Jan. 7.18-19p3), and MRO (Jan. 7.28-32p4)

MPEC 2010-A30 - "20:58 UT" - 2010 AR1

K10A01R 2010 AR1 (risk-listed, Earth MOID=0.8 LD, H=25.9 ~22m) was discovered at 0639 UT on 7 Jan. by CSS, which observed it at Jan. 7.28-29p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Jan. 7.37-38p3), MRO (Jan. 7.37-41p4), and Kevin Hills via RAS Obs. Moorook (Jan. 7.63-65p3). This object was within ten lunar distances (LD) of Earth, reaching 9.8 LD on 4 Jan.

MPEC 2010-A29 - "17:33 UT" - 2010 AL

K10A00L 2010 AL (small asteroid, H=22.2 ~123m) was discovered at 1100 UT on 6 Jan. by the Spacewatch 0.9m telescope, which observed it at Jan. 6.46-49p3. The discovery was confirmed by MRO (Jan. 6.53-56p4, 7.32-34p4 & 7.54-55p4), Spacewatch 1.8m (Jan. 6.54-55p2 & 7.35p3), and Great Shefford Obs. (Jan. 7.14-16p3).

MPEC 2010-A28 - "17:29 UT" - 2010 AK

K10A00K 2010 AK (risk-listed, Earth MOID=9.9 LD, H=19.2 ~490m) was discovered at 0728 UT on 6 Jan. by Spacewatch 1.8m, which observed it at Jan. 6.31-36p3, 6.44-45p3, 6.52p2, and 7.19-20p3. The discovery was confirmed by Astronomical Research Obs. Westfield (ARO Westfield) (Jan. 6.46-47p3), Great Shefford Obs. (Jan. 7.10-11p3), and MRO (Jan. 7.25-27p4).

MPEC 2010-A27 - "17:20 UT" - 2010 AJ

K10A00J 2010 AJ (risk-listed, Q=5.090 AU, H=20.0 ~339m) was discovered at 0655 UT on 6 Jan. by Spacewatch 0.9m, which observed it at Jan. 6.29-32p3. The discovery was confirmed by ARO Westfield (Jan. 6.44-45p2), MRO (Jan. 6.45-49p4 & 7.27-30p4), Spacewatch 1.8m (Jan. 6.47-48p3 & 7.22p2), Great Shefford Obs. (Jan. 7.11-13p3), and McCarthy Obs. (Jan. 7.17p1).

MPEC 2010-A26 - "17:16 UT" - 2010 AH

K10A00H 2010 AH (Q=4.260 AU, H=19.6 ~407m) was discovered at 0613 UT on 6 Jan. by LINEAR, which observed it at Jan. 6.26-31p5. The discovery was confirmed by Great Shefford Obs. (Jan. 6.96-97p3), McCarthy Obs. (Jan. 7.05-06p2), and MRO (Jan. 7.17-19p4).

MPEC 2010-A25 - "16:01 UT" - 2009 BE77

K09B77E 2009 BE77 (Q=4.615 AU, H=18.1 ~812m) from David Tholen's team on Mauna Kea (Nov. 11.37-38p3 at R=22.1-4 & Dec. 9.26-27p3 at R=22.6-23.1)

<< DOU on 7 Jan. '10 >> MPEC 2010-A24 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K09X00O 2009 XO (arc=28 days, H=20.3 ~295m) from ARO Westfield (Jan. 6.47-49p6)
Observations of recently (no longer) risk-listed objects
K09X06T 2009 XT6 (arc=24 days, H=20.2 ~309m) from ARO Westfield (Jan. 6.28-29p4)
Observations of small asteroids (H>22.0)
K10A00F 2010 AF (arc=1 day, H=24.9 ~35m) from LINEAR (Jan. 6.32-37p5)
K09X06Z 2009 XZ6 (arc=22 days, H=26.2 ~19m) from ARO Westfield (Jan. 6.29-33p3 at V=22.0-22.2)
K09T10F 2009 TF10 (arc=83 days, H=22.1 ~129m) from ARO Westfield (Jan. 6.15-18p3)
Observations of other objects
K10A00E 2010 AE (arc=2 days, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 7.24p3)
K09X02R 2009 XR2 (arc=24 days, H=19.0 ~537m) from ARO Westfield (Jan. 6.19-22p7)
K09X02B 2009 XB2 (arc=26 days, H=20.4 ~282m) from LINEAR (Jan. 6.32-37p5) and CSS (Jan. 6.37-39p4)
K09X00V 2009 XV (Q=4.337 AU, arc=28 days, H=21.0 ~214m) from ARO Westfield (Jan. 6.30-31p3)
K09X00D 2009 XD (Q=4.099 AU, arc=30 days, H=18.7 ~616m) from ARO Westfield (Jan. 6.10-11p4)
K09WP3E 2009 WE253 (Q=4.016 AU, arc=2 opp, H=17.7 ~977m) from CSS (Jan. 6.43-45p4)
K09WA4Z 2009 WZ104 (arc=42 days, H=20.5 ~269m) from ARO Westfield (Jan. 6.12-14p4)
K09W06R 2009 WR6 (arc=49 days, H=18.3 ~741m) from ARO Westfield (Jan. 6.38-39p4)
K09W06O 2009 WO6 (Q=4.882 AU, arc=80 days, H=17.4 ~1.12 km) from Desert Moon Obs. (Jan. 6.12-14p3)
K09T10M 2009 TM10 (arc=110 days, H=19.5 ~426m) from Desert Moon Obs. (Jan. 6.17-22p3)
K09T08B 2009 TB8 (arc=84 days, H=18.1 ~812m) from ARO Westfield (Jan. 5.99-01p3)
K09O09P 2009 OP9 (arc=161 days, H=19.3 ~467m) from ARO Westfield (Jan. 6.22-24p3)
K06M10F 2006 MF10 (arc=3 opp, H=19.4 ~446m) from Eric Elst via La Silla (1996 April 18.24-27p3 & 1996 April 20.20-23p3)
K06K37Z 2006 KZ37 (arc=3 opp, H=19.1 ~513m) from LINEAR (Jan. 6.20-25p5)
K06BE8A 2006 BA148 (arc=3 opp, H=18.4 ~708m) from ARO Westfield (Jan. 6.42-43p3)
K05X77W 2005 XW77 (arc=3 opp, H=20.7 ~245m) from MLS (Jan. 6.17-19p4)
K05X01D 2005 XD1 (arc=3 opp, H=19.4 ~446m) from LINEAR (Jan. 6.07-13p4)
K05T51Y 2005 TY51 (Q=4.048 AU, arc=2 opp, H=17.7 ~977m) from LINEAR (Jan. 6.13-18p5)
K04X50D 2004 XD50 (arc=2 opp, H=18.5 ~676m) from LINEAR (Jan. 6.32-38p5)
K04S09T 2004 ST9 (arc=3 opp, H=18.0 ~851m) from Spacewatch 1.8m (Jan. 6.27-29p3)
K03C01R 2003 CR1 (arc=3 opp, H=19.9 ~355m) from Spacewatch 1.8m (Jan. 6.49-50p3)
K02Y02N 2002 YN2 (i=50.3°, arc=5 opp, H=18.4 ~708m) from CSS (Jan. 6.30-34p8)
K02X40A 2002 XA40 (arc=5 opp, H=17.0 ~1.35 km) from Spacewatch 0.9m (Jan. 6.40-43p3)
K02N01P 2002 NP1 (arc=3 opp, H=17.6 ~1.02 km) from LINEAR (Jan. 6.06-12p3)
K02N00X 2002 NX (arc=2 opp, H=19.3 ~467m) from Spacewatch 0.9m (Jan. 6.17-21p3)
K02A15T 2002 AT15 (i=36.4°, arc=3 opp, H=18.3 ~741m) from ARO Westfield (Jan. 6.40-41p3)
K00O08G 2000 OG8 (Q=4.115 AU, arc=3 opp, H=17.7 ~977m) from Spacewatch 0.9m (Jan. 6.22-25p3)
J97Y03M 1997 YM3 (Q=5.450 AU, arc=3 opp, H=17.2 ~1.23 km) from Spacewatch 0.9m (Jan. 6.46-49p2)
J95S00A 1995 SA (Q=4.027 AU, arc=6 opp, H=17.4 ~1.12 km) from ARO Westfield (Jan. 6.25-27p3)
M8587 228587 2002 AP7 from Spacewatch 0.9m (Jan. 6.08-11p3) and LINEAR (Jan. 6.22-25p4)
M6554 226554 2003 WR21 from LINEAR (Jan. 6.46-50p4)
G2998 162998 2001 SK162 from CSS (Jan. 6.11-13p4)
F4330 154330 2002 VX94 from MLS (Jan. 6.11-13p4)
F4300 154300 2002 UO from CSS (Jan. 6.25-27p4) and MLS (Jan. 6.37-39p4)
F3201 153201 2000 WO107 from CSS (Jan. 6.38-39p4)
F2931 152931 2000 EA107 from LINEAR (Jan. 6.47-51p4)
A3067 103067 1999 XA143 from Desert Moon Obs. (Jan. 6.53-55p3)
99248 99248 2001 KY66 from CSS (Jan. 6.35-37p4)
86326 86326 1999 WK13 from LINEAR (Jan. 6.13-19p5)
25143 25143 Itokawa (1998 SF36) from LightBuckets Obs. Mayhill (Jan. 5.21-24p2)
22753 22753 1998 WT from LINEAR (Jan. 6.21-25p4)
17274 17274 2000 LC16 from MLS (Jan. 6.18-20p4)
10165 10165 1995 BL2 from LINEAR (Jan. 6.32-38p5)
09950 9950 ESA (1990 VB) from Desert Moon Obs. (Jan. 6.09-10p5)
05131 5131 1990 BG from LINEAR (Jan. 6.33-38p5) and CSS (Jan. 6.48-50p3)
04055 4055 Magellan (1985 DO2) from MLS (Jan. 6.50-52p4)
03553 3553 Mera (1985 JA) from CSS (Jan. 6.11-13p4)

Observers on 7 January '10

Nineteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2010-A32 -- P/2010 A2
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 16 in MPECs 2010-A24, 2010-A27 & 2010-A28 -- 2010 AK, 2010 AJ, 2009 XZ6, 2009 XV, 2009 XT6, 2009 XR2, 2009 XO, 2009 XD, 2009 WZ104, 2009 WR6, 2009 TF10, 2009 TB8, 2009 OP9, 2006 BA148, 2002 AT15, 1995 SA
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2010-A24, 2010-A30 & 2010-A31 -- 2010 AR1, C/2010 A1, 2009 XB2, 2009 WE253, 2002 YN2, 99248, 162998, 154300, 153201, 5131, 3553
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2010-A24 -- 2009 WO6, 2009 TM10, 103067, 9950
`252`	Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2004 XP14
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2004 XP14
`J95`	Great Shefford Obs. in England, 6 in MPECs 2010-A26, 2010-A27, 2010-A28, 2010-A29, 2010-A31 & 2010-A32 -- 2010 AL, 2010 AK, 2010 AJ, 2010 AH, P/2010 A2, C/2010 A1
`704`	LINEAR in New Mexico, 16 in MPECs 2010-A24, 2010-A26 & 2010-A32 -- 2010 AH, 2010 AF, P/2010 A2, 2009 XB2, 2006 KZ37, 2005 XD1, 2005 TY51, 2004 XD50, 2002 NP1, 86326, 228587, 22753, 226554, 152931, 10165, 5131
`8094`	Eric Elst via La Silla in Chile, 1 in MPEC 2010-A24 -- 2006 MF10
`H12`	LightBuckets Obs. Mayhill in New Mexico, 1 in MPEC 2010-A24 -- 25143
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2010-A26, 2010-A27, 2010-A28, 2010-A29, 2010-A30, 2010-A31 & 2010-A32 -- 2010 AR1, 2010 AL, 2010 AK, 2010 AJ, 2010 AH, P/2010 A2, C/2010 A1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A25 -- 2009 BE77
`932`	McCarthy Obs. in Connecticut, 2 in MPECs 2010-A26 & 2010-A27 -- 2010 AJ, 2010 AH
`900`	Moriyama Obs. in Japan, 1 in MPEC 2010-A31 -- C/2010 A1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2010-A24, 2010-A31 & 2010-A32 -- P/2010 A2, C/2010 A1, 2005 XW77, 17274, 154330, 154300, 4055
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-A31 & 2010-A32 -- P/2010 A2, C/2010 A1
D90`	Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-A30 -- 2010 AR1
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2010-A24, 2010-A27 & 2010-A29 -- 2010 AL, 2010 AJ, 2002 XA40, 2002 NX, 2000 OG8, 1997 YM3, 228587
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2010-A24, 2010-A27, 2010-A28, 2010-A29 & 2010-A30 -- 2010 AR1, 2010 AL, 2010 AK, 2010 AJ, 2010 AE, 2004 ST9, 2003 CR1

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 7 January '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2010 AR1	JPL Sentry	2358	2011-2108	199	2.2e-05	-5.11	-5.86	0	JPL: "Analysis based on 14 observations spanning .37542 days (2010-Jan-07.27712 to 2010-Jan-07.65254)." Diameter approximately 0.023 km. from mean, weighted H=25.9.

2010 AK	JPL Sentry	1941	2014-2106	130	1.7e-07	-3.73	-4.30	0	JPL: "Analysis based on 21 observations spanning .96291 days (2010-Jan-06.31146 to 2010-Jan-07.27437)." Diameter approximately 0.457 km. from mean, weighted H=19.4.

2010 AJ	JPL Sentry	1941	2041-2109	5	4.3e-08	-5.14	-5.45	0	JPL: "Analysis based on 22 observations spanning 1.0160 days (2010-Jan-06.28873 to 2010-Jan-07.30472)." Diameter approximately 0.341 km. from mean, weighted H=20.0.

2009 XO	JPL Sentry	1526	2038	1	1.1e-07	-4.46	-4.46	0	JPL: "Analysis based on 154 observations spanning 28.338 days (2009-Dec-09.152 to 2010-Jan-06.490002)." Diameter approximately 0.290 km. from mean, weighted H=20.3.
2009 XO	NEODyS	1526	2038-2088	3	1.86e-07	-4.35	-4.46	0	NEODyS: "Based on 154 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/06.491."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant 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" to learn more.

Chronology on 7 January '10

Times are UTC for when items were noted or added by The Tracking News.

2358	Noted that JPL Sentry has posted 2010 AR1 as an impact risk - see above Grabbed MPEC 2010-A32 - Comet P/2010 A2 (LINEAR) - see above
2305	Grabbed MPEC 2010-A31 - Comet C/2010 A1 (Hill) - see above
2201	Grabbed MPEC 2010-A30 - 2010 AR1 - see above
1941	Noted that JPL Sentry has posted 2010 AJ as an impact risk - see above Noted that JPL Sentry has posted 2010 AK as an impact risk - see above Grabbed MPEC 2010-A25 - 2009 BE77 - see above Grabbed MPEC 2010-A26 - 2010 AH - see above Grabbed MPEC 2010-A27 - 2010 AJ - see above Grabbed MPEC 2010-A28 - 2010 AK - see above Grabbed MPEC 2010-A29 - 2010 AL - see above
1526	Noted that JPL Sentry has updated its 2009 XO risk assessment - see above Noted that NEODyS has updated its 2009 XO risk assessment - see above Grabbed MPEC 2010-A24 - Daily Orbit Update - see above
0302	Noted Radar Astrometry database update - see above

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