2009-01-07 Tracking News

Contents on 7 January '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 5 updated
- New MPECs -- four MPECs
Observers -- fifteen 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
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 7 January '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, four were "one nighters."

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

New MPECs on 7 January '09

Minor Planet Electronic Circulars

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

MPEC 2009-A40 time-stamped "07:12 UT" - Daily Orbit Update - see below
MPEC 2009-A41 time-stamped "13:47 UT" - 2000 YJ29 = 2009 AO - see below
MPEC 2009-A42 time-stamped "20:24 UT" - 2007 OR10 - see below
MPEC 2009-A43 time-stamped "21:57 UT" - Comet P/2008 Y3 (McNaught)

MPEC 2009-A43 - "21:57 UT" - Comet P/2008 Y3 (McNaught)

PK08Y030 P/2008 Y3 (McNaught) (i=38.9°, q=4.445 AU, Q=11.680 AU, TP=2009 Jan. 15.107 TT) from North Ryde Obs. (Jan. 4.59p1, 4.63p1 & 5.56-58p2), Great Shefford Obs. (Jan. 6.05-06p3), Farm Cove Obs. (Jan. 7.38-39p3), Table Mtn. Obs. (Jan. 7.39-41p4), and Moriyama Obs. (Jan. 7.74-75p2)

MPEC 2009-A42 - "20:24 UT" - 2007 OR10

K07O10R 2007 OR10 (q=32.744 AU, Q=110.386 AU, H=2.5 ~1071 km) was discovered at 0927 UT on 17 July 2007 from Mt. Palomar, where it was observed at 2007 July 17.39p1, 2007 July 17.44p1, 2007 July 18.33-37p2, 2007 July 21.38p1, 2007 Aug. 8.28p1, 2007 Aug. 8.37p1, 2007 Aug. 8.47p1, 2007 Sept. 5.28p1, 2007 Sept. 5.38p1, 2007 Oct. 15.10p1, 2007 Oct. 16.10p1, 2007 Oct. 16.23p1, 2008 June 12.47p1, 2008 June 16.43p1, 2008 June 17.44p1, 2008 July 3.37p1, 2008 July 3.48p1, 2008 July 4.37p1, 2008 July 4.47p1, 2008 Aug. 6.36p1, 2008 Aug. 6.41p1, 2008 Aug. 8.27p1, and 2008 Aug. 8.32p1. The discovery was confirmed by Cerro Tololo Inter-American Obs. (CTIO) (2008 Aug. 23.04p1 & 2008 Aug. 23.11p1).

MPEC 2009-A41 - "13:47 UT" - 2000 YJ29 = 2009 AO

<< DOU on 7 Jan. '09 >> MPEC 2009-A40 - "07:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K08Y32V 2008 YV32 (small asteroid, arc=7 days, H=26.3 ~19m) from Great Shefford Obs. (Jan. 6.96-97p3)
K08Y29F 2008 YF29 (small asteroid, arc=8 days, H=24.1 ~51m) from the Spacewatch 1.8m telescope (Jan. 7.23-24p3)
Observations of other objects
K09A00T 2009 AT (Q=7.059 AU, arc=2 days, H=21.0 ~214m) from Koschny Obs. (Jan. 3.07-09p2)
K08W94Z 2008 WZ94 (q=0.345 AU, arc=38 days, H=20.1 ~323m) from Spacewatch 1.8m (Jan. 7.07-08p3)
K08W60L 2008 WL60 (arc=44 days, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (Jan. 6.64-69p11)
K08S82H 2008 SH82 (arc=102 days, H=21.4 ~178m) from Hamamatsu-Yuto Obs. (Jan. 6.59-63p6)
K08E05V 2008 EV5 (arc=2 opp, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Jan. 6.43p10 & 6.50-51p10)
K06BE7Q 2006 BQ147 (arc=4 opp, H=18.9 ~562m) from the Siding Spring Survey (SSS) (Jan. 6.54-58p4)
K05W55S 2005 WS55 (arc=4 opp, H=16.0 ~2.14 km, q=1.108 AU) from Koschny Obs. (Jan. 6.78p1)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (Jan. 6.76-81p16)
K04L03V 2004 LV3 (arc=2 opp, H=18.8 ~589m) from Boambee Obs. (Jan. 6.44p1 & 6.50-52p2)
K01F09X 2001 FX9 (arc=4 opp, H=18.7 ~616m) from Goodricke-Pigott Obs. (Jan. 1.34-37p3, 2.34-37p3 & 3.34-37p3)
F3306 153306 2001 JL1 from Boambee Obs. (Jan. 6.52-53p2)
E1765 141765 2002 MP3 from Inastars Obs. (Jan. 6.81-82p4)
D7805 137805 1999 YK5 from Koschny Obs. (Jan. 6.75p1)
89355 89355 2001 VS78 from Hamamatsu-Yuto Obs. (Jan. 6.52-54p6)
53430 53430 1999 TY16 from Boambee Obs. (Jan. 6.50-52p2)
22099 22099 2000 EX106 from Deep Sky Obs. (Jan. 5.87-88p6)
08567 8567 1996 HW1 from Deep Sky Obs. (Jan. 5.82-85p6)
03838 3838 Epona (1986 WA) from Deep Sky Obs. (Jan. 5.77-78p5)
03199 3199 Nefertiti (1982 RA) from Goodricke-Pigott Obs. (Jan. 3.51-53p3)

Observers on 7 January '09

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`432`	Boambee Obs. in New South Wales, 3 in MPEC 2009-A40 -- 2004 LV3, 53430, 153306
`807`	Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2009-A42 -- 2007 OR10
`B60`	Deep Sky Obs. in Germany, 3 in MPEC 2009-A40 -- 22099, 8567, 3838
`E85`	Farm Cove Obs. in New Zealand, 1 in MPEC 2009-A43 -- P/2008 Y3
`683`	Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2009-A40 -- 2001 FX9, 3199
`J95`	Great Shefford Obs. in England, 2 in MPECs 2009-A40 & 2009-A43 -- 2008 YV32, P/2008 Y3
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-A40 -- 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 89355
`B15`	Inastars Obs. in Germany, 1 in MPEC 2009-A40 -- 141765
`B12`	Koschny Obs., 3 in MPEC 2009-A40 -- 2009 AT, 2005 WS55, 137805
`900`	Moriyama Obs. in Japan, 1 in MPEC 2009-A43 -- P/2008 Y3
`675`	Mt. Palomar in southern California, 1 in MPEC 2009-A42 -- 2007 OR10
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2009-A43 -- P/2008 Y3
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-A40 -- 2006 BQ147
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-A40 -- 2008 YF29, 2008 WZ94
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2009-A43 -- P/2008 Y3

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

Impact Risk Monitoring on 7 January '09

**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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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

2008 YV32	JPL Sentry	1448	2085-2107	13	7.7e-06	-6.08	-6.67	0	JPL: "Analysis based on 36 observations spanning 6.7511 days (2008-Dec-31.22029 to 2009-Jan-06.97134)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
2008 YV32	NEODyS	1448	2069-2088	5	1.1e-06	-6.86	-7.08	0	NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/06.972."

2008 YF29	NEODyS	1448	2045-2090	2	1.99e-07	-6.57	-6.62	0	NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/07.241."

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 '09

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

2259	Grabbed MPEC 2009-A43 - Comet P/2008 Y3 (McNaught) - see above
2103	Grabbed MPEC 2009-A42 - 2007 OR10 - see above
1448	Noted that NEODyS has updated its 2008 YF29 risk assessment - see above Noted that JPL Sentry has updated its 2008 YV32 risk assessment - see above Noted that NEODyS has updated its 2008 YV32 risk assessment - see above Grabbed MPEC 2009-A40 - Daily Orbit Update - see above Grabbed MPEC 2009-A41 - 2000 YJ29 = 2009 AO - see above

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