2010-01-10 Tracking News

Contents on 10 January '10

IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 6 new, 6 updated
- New MPECs -- three MPECs
Observers -- fifteen 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.

NEOCP Activity on 10 January '10

The MPC's NEO Confirmation Page has 12 listings: 6 new, 6 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and six updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of eighteen 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 10 January '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-A49 time-stamped "07:11 UT" - Daily Orbit Update - see below
MPEC 2010-A50 time-stamped "16:25 UT" - Comet P/2010 A1 (Hill) - see below
MPEC 2010-A51 time-stamped "16:33 UT" - Comet P/2010 A2 (LINEAR)

MPEC 2010-A51 - "16:33 UT" - Comet P/2010 A2 (LINEAR)

PK10A020 P/2010 A2 (LINEAR) (q=1.869 AU, TP=2009 Oct. 7.360 TT) from Nazaret Obs. (Jan. 9.07-08p3), RAS Obs. Mayhill (Jan. 9.43-47p5 & 10.41p1), Montcabre Obs. (Jan. 9.97-00p3), Malaga Obs. (Jan. 9.99-00p3), and Magdalena Ridge Obs. (MRO) (Jan. 10.11-19p5)

MPEC 2010-A50 - "16:25 UT" - Comet P/2010 A1 (Hill)

PK10A010 P/2010 A1 (Hill) (q=1.942 AU, Q=6.716 AU, TP=2009 Aug. 9.353 TT) from Geisei Obs. (Jan. 7.60-61p2), Ageo Obs. (Jan. 8.78-79p2), Cielo Profundo Obs. (Jan. 9.05-06p2), and RAS Mayhill (Jan. 10.32-33p2)

<< DOU on 10 Jan. '10 >> MPEC 2010-A49 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K10A03D 2010 AD3 (small asteroid, Q=4.835 AU, arc=2 days, H=23.9 ~56m) from the Spacewatch 1.8m telescope (Jan. 10.21-22p3)
K10A01R 2010 AR1 (small asteroid, arc=3 days, H=25.8 ~23m) from MRO (Jan. 9.38-39p3) and Spacewatch 1.8m (Jan. 10.26p3)
K10A00K 2010 AK (arc=4 days, H=19.3 ~467m) from MRO (Jan. 9.38-39p3) and Spacewatch 1.8m (Jan. 10.23-24p3)
K10A00J 2010 AJ (Q=4.540 AU, arc=4 days, H=20.0 ~339m) from MRO (Jan. 9.38-39p3) and Spacewatch 1.8m (Jan. 10.24-25p3)
Observations of recently (no longer) risk-listed objects
K09Y06S 2009 YS6 (i=148.0°, q=1.650 AU, Q=50.365 AU, arc=21 days, H=14.1 ~5.13 km) from the Mt. Lemmon Survey (MLS) (Jan. 7.39-41p3)
Observations of other objects
K09X02R 2009 XR2 (arc=28 days, H=19.0 ~537m) from Hamamatsu-Yuto Obs. (Jan. 9.58-60p5) and Doc Greiner Research Obs. (DGRO) (Jan. 10.12-13p9)
K09W06R 2009 WR6 (arc=52 days, H=18.3 ~741m) from Rio Cuarto Obs. (Jan. 9.22-24p3)
K09W00F 2009 WF (arc=53 days, H=19.9 ~355m) from the Catalina Sky Survey (CSS) (Jan. 8.20-25p8)
K09N00A 2009 NA (Q=4.129 AU, arc=190 days, H=17.6 ~1.02 km) from MLS (Jan. 7.22-24p4)
K09M06X 2009 MX6 (arc=197 days, H=19.2 ~490m) from MLS (Jan. 7.22-24p4)
K08Y32Z 2008 YZ32 (arc=2 opp, H=20.2 ~309m) from Kurihara Obs. (Jan. 9.45p2) and Hamamatsu-Yuto Obs. (Jan. 9.48-51p5)
K07M13K 2007 MK13 (arc=3 opp, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Jan. 8.69-72p10 & 9.67-69p4) and DGRO (Jan. 10.10-11p8)
K06U00R 2006 UR (arc=2 opp, H=19.4 ~446m) from Rio Cuarto Obs. (Jan. 9.32-33p3)
K05M00C 2005 MC (Q=4.167 AU, arc=3 opp, H=16.6 ~1.62 km) from Rio Cuarto Obs. (Jan. 9.28-30p3) and Hamamatsu-Yuto Obs. (Jan. 9.69p2)
K04X50D 2004 XD50 (arc=2 opp, H=18.5 ~676m) from Hamamatsu-Yuto Obs. (Jan. 9.76-77p5)
K04X35M 2004 XM35 (arc=2 opp, H=19.8 ~371m) from CSS (Jan. 8.17-18p4)
J4268 194268 2001 UY4 from MLS (Jan. 9.34-35p5)
D8937 138937 2001 BK16 from CSS (Jan. 8.17-18p3)
16064 16064 1999 RH27 from CSS (Jan. 8.52-53p4)
05626 5626 1991 FE from Hamamatsu-Yuto Obs. (Jan. 8.38-39p4 & 9.39-41p4)

Observers on 10 January '10

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2010-A50 -- P/2010 A1
`703`	Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2010-A49 -- 2009 WF, 2004 XM35, 16064, 138937
`J01`	Cielo Profundo Obs. in Spain, 1 in MPEC 2010-A50 -- P/2010 A1
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2010-A49 -- 2009 XR2, 2007 MK13
`372`	Geisei Obs. in Japan, 1 in MPEC 2010-A50 -- P/2010 A1
`379`	Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2010-A49 -- 2009 XR2, 2008 YZ32, 2007 MK13, 2005 MC, 2004 XD50, 5626
`D95`	Kurihara Obs. in Japan, 1 in MPEC 2010-A49 -- 2008 YZ32
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-A49 & 2010-A51 -- 2010 AR1, 2010 AK, 2010 AJ, P/2010 A2
`J40`	Malaga Obs. in Spain, 1 in MPEC 2010-A51 -- P/2010 A2
`213`	Montcabre Obs. in Spain, 1 in MPEC 2010-A51 -- P/2010 A2
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2010-A49 -- 2009 YS6, 2009 NA, 2009 MX6, 194268
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2010-A51 -- P/2010 A2
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-A50 & 2010-A51 -- P/2010 A2, P/2010 A1
`I20`	Rio Cuarto Obs. in Argentina, 3 in MPEC 2010-A49 -- 2009 WR6, 2006 UR, 2005 MC
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2010-A49 -- 2010 AR1, 2010 AK, 2010 AJ, 2010 AD3

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

Impact Risk Monitoring on 10 January '10

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 AD3	JPL Sentry	1624	R E M O V E D						JPL: Risk listing removed at 0949 UTC.

2010 AR1	NEODyS	1625	R E M O V E D						-
2010 AR1	JPL Sentry	1624	R E M O V E D						JPL: Risk listing removed at 0954 UTC.

2010 AK	NEODyS	1625	R E M O V E D						-

2010 AJ	NEODyS	1625	R E M O V E D						-
2010 AJ	JPL Sentry	1624	R E M O V E D						JPL: Risk listing removed at 0948 UTC.

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 10 January '10

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

1802	Grabbed MPEC 2010-A50 - Comet P/2010 A1 (Hill) - see above Grabbed MPEC 2010-A51 - Comet P/2010 A2 (LINEAR) - see above
1625	Noted that NEODyS has removed 2010 AJ as an impact risk - see above Noted that NEODyS has removed 2010 AK as an impact risk - see above Noted that NEODyS has removed 2010 AR1 as an impact risk - see above Grabbed MPEC 2010-A49 - Daily Orbit Update - see above
1624	Noted that JPL Sentry has removed 2010 AD3 as an impact risk - see above Noted that JPL Sentry has removed 2010 AJ as an impact risk - see above Noted that JPL Sentry has removed 2010 AR1 as an impact risk - see above

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