2009-01-11 Tracking News

Contents on 11 January '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- two MPECs
Observers -- five observing facilities
Impact Risk Monitoring -- one object
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 11 January '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing.

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 11 January '09

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-A58 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2009-A59 time-stamped "23:52 UT" - Comets C/2008 T6, 2008 T7, 2008 T8, 2008 T9, 2008 T10, 2008 T11, 2008 T12 (SOHO)

MPEC 2009-A59 - "23:52 UT" - Comets C/2008 T6, 2008 T7, 2008 T8, 2008 T9, 2008 T10, 2008 T11, 2008 T12 (SOHO)

CK08T120 C/2008 T12 from the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (2008 Oct. 14.31-41p16)
CK08T110 C/2008 T11 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (2008 Oct. 13.64-78p14, 2008 Oct. 13.82-86p6 & 2008 Oct. 13.97-99p4) and SOHO C2 (2008 Oct. 14.00-04p6)
CK08T100 C/2008 T10 from SOHO C3 (2008 Oct. 11.85-89p6) and SOHO C2 (2008 Oct. 12.04-10p10 & 2008 Oct. 12.15p2)
CK08T090 C/2008 T9 from SOHO C3 (2008 Oct. 5.30-36p6 & 2008 Oct. 5.45-49p6) and SOHO C2 (2008 Oct. 5.58-63p10)
CK08T080 C/2008 T8 from SOHO C3 (2008 Oct. 5.28-40p14 & 2008 Oct. 5.45-82p34) and SOHO C2 (2008 Oct. 5.83-92p14)
CK08T070 C/2008 T7 from SOHO C2 (2008 Oct. 3.87-99p16)
CK08T060 C/2008 T6 from SOHO C2 (2008 Oct. 2.38-53p22)

<< DOU on 11 Jan. '09 >> MPEC 2009-A58 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08Y32V 2008 YV32 (small asteroid, arc=9 days, H=26.3 ~19m) from Astronomical Research Obs. (ARO) (Jan. 9.08-09p9)
Observations of recently (no longer) risk-listed objects
K08Y29E 2008 YE29 (Q=4.532 AU, arc=10 days, H=20.2 ~309m) from ARO (Jan. 9.23p3)
Observations of small asteroids (H>22.0)
K08Y27N 2008 YN27 (arc=11 days, H=22.1 ~129m) from ARO (Jan. 9.23-24p3)
K08Y03G 2008 YG3 (Q=4.089 AU, arc=18 days, H=22.1 ~129m) from ARO (Jan. 9.21p3)
K08W00K 2008 WK (arc=51 days, H=23.2 ~78m) from ARO (Jan. 8.44-46p3)
Observations of other objects
K09A00T 2009 AT (Q=7.035 AU, arc=7 days, H=21.0 ~214m) from ARO (Jan. 9.16-19p3)
K08Y32Z 2008 YZ32 (arc=8 days, H=20.2 ~309m) from ARO (Jan. 8.33-34p3)
K08Y27S 2008 YS27 (arc=10 days, H=21.2 ~195m) from ARO (Jan. 8.42-43p3)
K08Y26G 2008 YG26 (arc=11 days, H=21.6 ~162m) from ARO (Jan. 9.20-21p3)
K08Y03E 2008 YE3 (arc=17 days, H=20.9 ~224m) from ARO (Jan. 8.36-37p3)
K08X02P 2008 XP2 (arc=34 days, H=18.5 ~676m) from ARO (Jan. 8.38p3)
K08X02E 2008 XE2 (arc=35 days, H=19.2 ~490m) from ARO (Jan. 8.36-37p2)
K08X01B 2008 XB1 (arc=37 days, H=20.9 ~224m) from ARO (Jan. 9.08-09p3)
K08W59B 2008 WB59 (arc=47 days, H=19.4 ~446m) from ARO (Jan. 9.02p2)
K08W14C 2008 WC14 (Q=5.322 AU, arc=49 days, H=20.1 ~323m) from ARO (Jan. 8.39-41p3)
K08W13Z 2008 WZ13 (arc=50 days, H=18.7 ~616m) from ARO (Jan. 9.05-07p3)
K08V04Q 2008 VQ4 (arc=110 days, H=19.3 ~467m) from ARO (Jan. 9.01-03p3)
K08U00C 2008 UC (arc=82 days, H=19.0 ~537m) from ARO (Jan. 9.04-05p5)
K08TF7K 2008 TK157 (arc=108 days, H=20.6 ~257m) from ARO (Jan. 9.15-16p3)
K08S82H 2008 SH82 (arc=105 days, H=21.4 ~178m) from ARO (Jan. 9.22p4)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from ARO (Jan. 9.19-20p3)
K08R24Y 2008 RY24 (arc=3 opp, H=17.8 ~933m) from ARO (Jan. 9.07-08p3)
K08M01N 2008 MN1 (i=37.2°, arc=194 days, H=20.1 ~323m) from ARO (Jan. 9.14-15p3)
K08E05V 2008 EV5 (arc=2 opp, H=20.0 ~339m) from Crni Vrh Obs. (Jan. 9.90-92p4)
K01L05M 2001 LM5 (arc=3 opp, H=19.3 ~467m) from ARO (Jan. 9.17-18p3)
K00CA1O 2000 CO101 (arc=2 opp, H=19.2 ~490m) from ARO (Jan. 8.48-49p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.6 ~1.02 km) from Koschny Obs. (Jan. 9.76-77p2, 9.86p1 & 9.91p1)
D7805 137805 1999 YK5 from Koschny Obs. (Jan. 9.81-82p3 & 9.94p1) and Cormons Obs. (Jan. 10.70-71p2)
03200 3200 Phaethon (1983 TB) from Cormons Obs. (Jan. 10.75-76p4)

Observers on 11 January '09

Five observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 25 in MPEC 2009-A58 -- 2009 AT, 2008 YZ32, 2008 YV32, 2008 YS27, 2008 YN27, 2008 YG3, 2008 YG26, 2008 YE3, 2008 YE29, 2008 XP2, 2008 XE2, 2008 XB1, 2008 WZ13, 2008 WK, 2008 WC14, 2008 WB59, 2008 VQ4, 2008 UC, 2008 TK157, 2008 SQ1, 2008 SH82, 2008 RY24, 2008 MN1, 2001 LM5, 2000 CO101
`A94`	Cormons Obs. in Italy, 2 in MPEC 2009-A58 -- 137805, 3200
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-A58 -- 2008 EV5
`B12`	Koschny Obs. in The Netherlands, 2 in MPEC 2009-A58 -- 1994 AW1, 137805
`2492`	LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPEC 2009-A59 -- C/2008 T9, C/2008 T8, C/2008 T7, C/2008 T6, C/2008 T12, C/2008 T11, C/2008 T10
`2493`	LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPEC 2009-A59 -- C/2008 T9, C/2008 T8, C/2008 T11, C/2008 T10

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

Impact Risk Monitoring on 11 January '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2355 and JPL at 2356 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	1614	2085-2107	11	7.0e-06	-6.14	-6.80	0	JPL: "Analysis based on 45 observations spanning 8.8674 days (2008-Dec-31.22029 to 2009-Jan-09.087737)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2008 YV32	NEODyS	1614	2085-2090	5	8.91e-07	-6.98	-7.30	0	NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/09.089."

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 11 January '09

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

2355	Grabbed MPEC 2009-A59 - Comets C/2008 T6, 2008 T7, 2008 T8, 2008 T9, 2008 T10, 2008 T11, 2008 T12 (SOHO) - see above
1614	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-A58 - Daily Orbit Update - see above

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