2010-01-15 Tracking News

Contents on 15 January '10

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- nine MPECs
Observers -- 29 observing facilities
Impact Risk Monitoring -- two 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.

NEOCP Activity on 15 January '10

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

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

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 15 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-A77 time-stamped "02:55 UT" - Comet P/2010 A1 (Hill) - see below
MPEC 2010-A78 time-stamped "03:01 UT" - Comet P/2010 A2 (LINEAR) - see below
MPEC 2010-A79 time-stamped "07:11 UT" - Daily Orbit Update - see below
MPEC 2010-A80 time-stamped "13:22 UT" - 2009 BT5 - see below
MPEC 2010-A81 time-stamped "18:50 UT" - 2010 AL60 - see below
MPEC 2010-A82 time-stamped "18:54 UT" - 2010 AM60 - see below
MPEC 2010-A83 time-stamped "19:04 UT" - 2010 AN60 - see below
MPEC 2010-A84 time-stamped "22:24 UT" - 2010 AO60 - see below
MPEC 2010-A85 time-stamped "23:21 UT" - Comet P/2010 A3 (Hill)

MPEC 2010-A85 - "23:21 UT" - Comet P/2010 A3 (Hill)

PK10A030 P/2010 A3 (Hill) (q=1.622 AU, Q=10.486 AU, TP=2010 Apr. 3.68038 TT) from La Sagra Obs. (2009 Oct. 14.88-90p3), Geisei Obs. (Jan. 9.48-49p3, 9.54p1 & 13.46-47p3), Osaki Obs. (Jan. 10.43-44p2), Sendai Obs. (Jan. 10.45p3), Chante-Perdrix Obs. (Jan. 10.79-82p3 & 15.77-78p3), Skylive Obs. (Jan. 10.81-82p3), and RAS Obs. Mayhill (Jan. 11.09-10p3)

MPEC 2010-A84 - "22:24 UT" - 2010 AO60

K10A60O 2010 AO60 (H=21.4 ~178m) was discovered at 0900 UT on 15 Jan. by the Catalina Sky Survey (CSS), which observed it at Jan. 15.38-39p3 and 15.56p5. The discovery was confirmed by Farra d'Isonzo Obs. (Jan. 15.89-90p3).

MPEC 2010-A83 - "19:04 UT" - 2010 AN60

K10A60N 2010 AN60 (small asteroid, Earth MOID=3.2 LD, H=26.8 ~15m) was discovered at 0610 UT on 15 Jan. by CSS, which observed it at Jan. 15.26-27p3, 15.33p2, and 15.46p4. The discovery was confirmed by Sabino Canyon Obs. (Jan. 15.41-42p3), Sandlot Obs. (Jan. 15.42p5), the Mt. Lemmon Survey (MLS) (Jan. 15.45p4), and Tenagra II Obs. (Jan. 15.49p3). This object is now within ten lunar distances (LD) of Earth, reaching 4.9 LD on 14 Jan.

MPEC 2010-A82 - "18:54 UT" - 2010 AM60

K10A60M 2010 AM60 (small asteroid, Q=4.108 AU, H=24.1 ~51m) was discovered at 0524 UT on 15 Jan. by CSS, which observed it at Jan. 15.23-25p5 and 15.29p3. The discovery was confirmed by Sabino Canyon Obs. (Jan. 15.30-31p3), Sandlot Obs. (Jan. 15.32p3), and Tenagra II Obs. (Jan. 15.46-47p3).

MPEC 2010-A81 - "18:50 UT" - 2010 AL60

K10A60L 2010 AL60 (small asteroid, H=22.3 ~117m) was discovered at 0425 UT on 14 Jan. by MLS, which observed it at Jan. 14.18-22p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Jan. 15.10-11p2) and Sabino Canyon Obs. (Jan. 15.25-26p2).

MPEC 2010-A80 - "13:22 UT" - 2009 BT5

K09B05T 2009 BT5 (H=20.7 ~245m) from David Tholen's team on Mauna Kea (2009 Sept. 8.23p3 at R=22.4-6 & Dec. 9.22p1 at R=24.3)

<< DOU on 15 Jan. '10 >> MPEC 2010-A79 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K10A40F 2010 AF40 (small asteroid, arc=3 days, H=25.0 ~34m) from Astronomical Research Obs. Westfield (ARO Westfield) (Jan. 14.28-29p3) and Spacewatch 1.8m (Jan. 15.21-22p3)
K09X00O 2009 XO (arc=36 days, H=20.5 ~269m) from Tenagra II Obs. (Jan. 14.47p3)
Observations of recently (no longer) risk-listed objects
K10A30E 2010 AE30 (small asteroid, arc=4 days, H=23.5 ~68m) from ARO Westfield (Jan. 14.12-13p4)
K10A01R 2010 AR1 (small asteroid, arc=7 days, H=25.8 ~23m) from Spacewatch 1.8m (Jan. 14.44-45p3)
K10A00K 2010 AK (arc=8 days, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 14.20p3)
K10A00J 2010 AJ (Q=4.579 AU, arc=9 days, H=20.1 ~323m) from Spacewatch 1.8m (Jan. 15.23-24p3)
Observations of small asteroids (H>22.0)
K10A30J 2010 AJ30 (arc=4 days, H=22.5 ~107m) from Sandlot Obs. (Jan. 14.23-24p2)
K10A03E 2010 AE3 (arc=6 days, H=23.7 ~62m) from ARO Westfield (Jan. 14.30-31p3)
K10A03B 2010 AB3 (Q=4.305 AU, arc=6 days, H=23.3 ~74m) from the Spacewatch 0.9m telescope (Jan. 14.13-15p2)
K10A02L 2010 AL2 (arc=6 days, H=26.6 ~16m) from ARO Westfield (Jan. 13.41-42p3)
K10A00L 2010 AL (arc=8 days, H=22.5 ~107m) from ARO Westfield (Jan. 13.47-49p3) and Spacewatch 1.8m (Jan. 14.42-43p3)
K09X08H 2009 XH8 (arc=30 days, H=23.2 ~78m) from Tenagra II Obs. (Jan. 14.17p3)
Observations of other objects
K10A30L 2010 AL30 from Desert Moon Obs. (Jan. 13.28-29p11)
K10A30H 2010 AH30 (i=42.5°, arc=5 days, H=18.5 ~676m) from ARO Westfield (Jan. 13.30-31p3), Tenagra II Obs. (Jan. 14.27-28p3), Spacewatch 1.8m (Jan. 15.18p2), and Sandlot Obs. (Jan. 15.23-25p3)
K10A02K 2010 AK2 (i=46.0°, arc=8 days, H=18.8 ~589m) from Tenagra II Obs. (Jan. 14.29-30p3)
K10A00E 2010 AE (arc=9 days, H=19.5 ~426m) from Spacewatch 1.8m (Jan. 14.45-46p3)
K09X02R 2009 XR2 (arc=32 days, H=19.0 ~537m) from Smolyan Obs. (Dec. 21.91-92p4) and ARO Westfield (Jan. 14.19p4)
K09X00V 2009 XV (Q=4.334 AU, arc=37 days, H=21.0 ~214m) from Spacewatch 1.8m (Jan. 15.16-17p3)
K09X00D 2009 XD from Smolyan Obs. (Dec. 23.85-86p3)
K09WP3E 2009 WE253 (Q=4.016 AU, arc=2 opp, H=17.7 ~977m) from Mirasteilas Obs. (Jan. 14.90-93p3)
K09WD9M 2009 WM139 (arc=184 days, H=18.6 ~645m) from ARO Westfield (Jan. 14.10-11p3)
K09WA4Z 2009 WZ104 (arc=50 days, H=20.5 ~269m) from Smolyan Obs. (Dec. 23.83p3) and ARO Westfield (Jan. 14.05-06p3)
K09W06K 2009 WK6 (arc=58 days, H=19.2 ~490m) from Spacewatch 0.9m (Jan. 14.09-11p3)
K09U00K 2009 UK (arc=90 days, H=20.1 ~323m) from ARO Westfield (Jan. 14.03-05p4)
K09N00A 2009 NA (Q=4.129 AU, arc=195 days, H=17.6 ~1.02 km) from Smolyan Obs. (Dec. 23.93p2)
K08B02S 2008 BS2 (arc=3 opp, H=18.2 ~776m) from Spacewatch 0.9m (Jan. 14.18-21p3)
K07M13K 2007 MK13 (arc=3 opp, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Jan. 14.54-61p9)
K07D56B 2007 DB56 (arc=3 opp, H=19.1 ~513m) from Spacewatch 0.9m (Jan. 11.50-54p2 & 12.51-53p2)
K06K37Z 2006 KZ37 (arc=3 opp, H=19.1 ~513m) from Smolyan Obs. (Dec. 23.96-97p4)
K05F04N 2005 FN4 (Q=4.698 AU, arc=3 opp, H=18.6 ~645m) from Tenagra II Obs. (Dec. 4.07-08p2)
K03B21A 2003 BA21 (q=0.184 AU, arc=4 opp, H=19.2 ~490m) from Spacewatch 0.9m (Jan. 11.44-48p2)
K03B00H 2003 BH (arc=4 opp, H=20.5 ~269m) from Spacewatch 1.8m (Jan. 15.09-10p3)
K01B10E 2001 BE10 (arc=3 opp, H=19.1 ~513m) from Rio Cuarto Obs. (Jan. 14.31-32p3)
K00O08G 2000 OG8 (Q=4.115 AU, arc=3 opp, H=17.7 ~977m) from Spacewatch 0.9m (Jan. 12.16-20p3)
J85W00A 1985 WA (Q=4.556 AU, arc=3 opp, H=18.1 ~812m) from George Obs. (Jan. 11.29-33p3)
G4216 164216 2004 OT11 from Spacewatch 0.9m (Jan. 12.22-25p3)
G1989 161989 Cacus (1978 CA) from Rio Cuarto Obs. (Jan. 14.15-17p3)
F2742 152742 1998 XE12 from Rio Cuarto Obs. (Jan. 14.20-22p3)
F2679 152679 1998 KU2 from Spacewatch 0.9m (Jan. 12.23-27p3)
D7084 137084 1998 XS16 from Rio Cuarto Obs. (Jan. 14.27-29p3)
86067 86067 1999 RM28 from Rio Cuarto Obs. (Jan. 14.23-25p3)
85818 85818 1998 XM4 from Rio Cuarto Obs. (Jan. 14.10-12p3)
39572 39572 1993 DQ1 from Spacewatch 0.9m (Jan. 14.19-23p3)
23606 23606 1996 AS1 from Spacewatch 0.9m (Jan. 12.36-38p2)
01685 1685 Toro (1948 OA) from LINEAR (Jan. 14.46-51p5)

MPEC 2010-A78 - "03:01 UT" - Comet P/2010 A2 (LINEAR)

PK10A020 P/2010 A2 (LINEAR) (q=1.976 AU, TP=2009 Nov. 17.248 TT) from Geisei Obs. (Jan. 7.58-59p2, 9.58-59p2 & 13.49-51p3), Spacewatch 1.8m (Jan. 8.22-23p3 & 12.43-45p6), Cielo Profundo Obs. (Jan. 9.95p1), Chante-Perdrix Obs. (Jan. 10.83p2, 10.96-97p2 & 11.88p1), Magdalena Ridge Obs. (MRO) (Jan. 12.17p1, 12.29p1, 12.36p1 & 12.43p1), RAS Mayhill (Jan. 12.17p1, 12.22p1 & 12.40-41p3), Maidbronn Obs. (Jan. 13.10-12p3), and La Silla (Jan. 14.20-26p10)

MPEC 2010-A77 - "02:55 UT" - Comet P/2010 A1 (Hill)

PK10A010 P/2010 A1 (Hill) (q=1.949 AU, Q=6.716 AU, TP=2009 Aug. 8.047 TT) from Sendai Obs. (Jan. 10.61-62p2), Chante-Perdrix Obs. (Jan. 10.87-89p3), Tzec Maun Obs. Mayhill (Jan. 11.43-44p3 & 11.49-51p3), and Maidbronn Obs. (Jan. 13.12-13p3)

Observers on 15 January '10

A total of 29 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 10 in MPEC 2010-A79 -- 2010 AL2, 2010 AL, 2010 AH30, 2010 AF40, 2010 AE30, 2010 AE3, 2009 XR2, 2009 WZ104, 2009 WM139, 2009 UK
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2010-A82, 2010-A83 & 2010-A84 -- 2010 AO60, 2010 AN60, 2010 AM60
`A77`	Chante-Perdrix Obs. in France, 3 in MPECs 2010-A77, 2010-A78 & 2010-A85 -- P/2010 A3, P/2010 A2, P/2010 A1
`J01`	Cielo Profundo Obs. in Spain, 1 in MPEC 2010-A78 -- P/2010 A2
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2010-A79 -- 2010 AL30
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-A84 -- 2010 AO60
`372`	Geisei Obs. in Japan, 2 in MPECs 2010-A78 & 2010-A85 -- P/2010 A3, P/2010 A2
`735`	George Obs. in Texas, 1 in MPEC 2010-A79 -- 1985 WA
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-A79 -- 2007 MK13
`704`	LINEAR in New Mexico, 1 in MPEC 2010-A79 -- 1685
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2010-A85 -- P/2010 A3
`809`	La Silla in Chile, 1 in MPEC 2010-A78 -- P/2010 A2
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2010-A78 -- P/2010 A2
`B82`	Maidbronn Obs. in Germany, 2 in MPECs 2010-A77 & 2010-A78 -- P/2010 A2, P/2010 A1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A80 -- 2009 BT5
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2010-A79 -- 2009 WE253
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2010-A81 & 2010-A83 -- 2010 AN60, 2010 AL60
`D92`	Osaki Obs. in Japan, 1 in MPEC 2010-A85 -- P/2010 A3
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-A78 & 2010-A85 -- P/2010 A3, P/2010 A2
`I20`	Rio Cuarto Obs. in Argentina, 6 in MPEC 2010-A79 -- 2001 BE10, 86067, 85818, 161989, 152742, 137084
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2010-A81, 2010-A82 & 2010-A83 -- 2010 AN60, 2010 AM60, 2010 AL60
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2010-A79, 2010-A82 & 2010-A83 -- 2010 AN60, 2010 AM60, 2010 AJ30, 2010 AH30
`D93`	Sendai Obs. in Japan, 2 in MPECs 2010-A77 & 2010-A85 -- P/2010 A3, P/2010 A1
`B40`	Skylive Obs. in Italy, 1 in MPEC 2010-A85 -- P/2010 A3
`071`	Smolyan Obs. in Bulgaria, 5 in MPEC 2010-A79 -- 2009 XR2, 2009 XD, 2009 WZ104, 2009 NA, 2006 KZ37
`691`	Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2010-A79 -- 2010 AB3, 2009 WK6, 2008 BS2, 2007 DB56, 2003 BA21, 2000 OG8, 39572, 23606, 164216, 152679
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2010-A78, 2010-A79 & 2010-A81 -- 2010 AR1, 2010 AL60, 2010 AL, 2010 AK, 2010 AJ, 2010 AH30, 2010 AF40, 2010 AE, P/2010 A2, 2009 XV, 2003 BH
`926`	Tenagra II Obs. in Arizona, 7 in MPECs 2010-A79, 2010-A82 & 2010-A83 -- 2010 AN60, 2010 AM60, 2010 AK2, 2010 AH30, 2009 XO, 2009 XH8, 2005 FN4
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-A77 -- P/2010 A1

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

Impact Risk Monitoring on 15 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 AF40	NEODyS	1502	R E M O V E D						-
2010 AF40	JPL Sentry	1502	R E M O V E D						JPL: Risk listing removed at 1056 UTC.

2009 XO	JPL Sentry	1502	2038-2081	2	3.1e-07	-4.18	-4.25	0	JPL: "Analysis based on 217 observations spanning 36.320 days (2009-Dec-09.152 to 2010-Jan-14.47163)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
2009 XO	NEODyS	1502	2038	1	2.17e-07	-4.25	-4.25	0	NEODyS: "Based on 217 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/14.472."

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 15 January '10

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

2358	Grabbed MPEC 2010-A85 - Comet P/2010 A3 (Hill) - see above
2305	Grabbed MPEC 2010-A84 - 2010 AO60 - see above
2023	Grabbed MPEC 2010-A83 - 2010 AN60 - see above
1902	Grabbed MPEC 2010-A81 - 2010 AL60 - see above Grabbed MPEC 2010-A82 - 2010 AM60 - see above
1502	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 Noted that JPL Sentry has removed 2010 AF40 as an impact risk - see above Noted that NEODyS has removed 2010 AF40 as an impact risk - see above Grabbed MPEC 2010-A79 - Daily Orbit Update - see above Grabbed MPEC 2010-A80 - 2009 BT5 - see above
0342	Grabbed MPEC 2010-A77 - Comet P/2010 A1 (Hill) - see above Grabbed MPEC 2010-A78 - Comet P/2010 A2 (LINEAR) - see above

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