2009-01-14 Tracking News

Contents on 14 January '09

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- two 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
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 14 January '09

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 1958 UTC when the database was dated 14 Jan.

136849 1998 CS1 from Goldstone DSS-14 70m antenna (Jan. 13.41 range & 14.28 range) - see links

NEOCP Activity on 14 January '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter."

New MPECs on 14 January '09

Minor Planet Electronic Circulars

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

MPEC 2009-A68 time-stamped "07:05 UT" - Daily Orbit Update - see below
MPEC 2009-A69 time-stamped "16:24 UT" - Comet P/2008 Y1 (Boattini)

MPEC 2009-A69 - "16:24 UT" - Comet P/2008 Y1 (Boattini)

PK08Y010 P/2008 Y1 (Boattini) (q=1.262 AU, Q=7.734 AU, TP=2009 Feb. 25.740 TT) from Petit Jean Mtn. South Obs. (PJMSO) (Jan. 12.03-04p7 & 14.02-03p10), Table Mtn. Obs. (Jan. 12.09-14p5), and Buchloe Obs. (Jan. 13.74p3)

<< DOU on 14 Jan. '09 >> MPEC 2009-A68 - "07:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K09A15M 2009 AM15 (arc=7 days, H=18.6 ~645m) from the Siding Spring Survey (SSS) (Jan. 13.48p2)
K09A00L 2009 AL (almost small, Q=4.135 AU, arc=13 days, H=21.8 ~148m) from Magdalena Ridge Obs. (MRO) (Jan. 13.19-21p3 & 14.16-17p4)
K08Y32U 2008 YU32 (arc=14 days, H=19.9 ~355m) from MRO (Jan. 13.16-17p3 at R=21.2-21.7 & 14.13-14p3 at R=21.8-22.1)
Observations of small asteroids (H>22.0)
K08Y03G 2008 YG3 (Q=4.062 AU, arc=22 days, H=22.1 ~129m) from Guidestar Obs. (Jan. 13.77-81p3)
Observations of other objects
K09A15K 2009 AK15 (arc=7 days, H=19.5 ~426m) from SSS (Jan. 13.49-50p3)
K09A00M 2009 AM (Q=4.763 AU, arc=12 days, H=21.2 ~195m) from Guidestar Obs. (Jan. 13.82-84p3)
K08Y00A 2008 YA (Q=4.840 AU, arc=28 days, H=17.9 ~891m) from SSS (Jan. 13.46p2)
K08R26T 2008 RT26 (arc=128 days, H=19.4 ~446m) from Mirasteilas Obs. (Jan. 13.77-80p3)
K08E32A 2008 EA32 (IEO, Q=0.804 AU, arc=2 opp, H=16.3 ~1.86 km) from SSS (Jan. 13.44p2)
K04X60Y 2004 XY60 (q=0.130 AU, arc=4 opp, H=18.9 ~562m) from SSS (Jan. 13.45p1)
K03X22B 2003 XB22 (arc=3 opp, H=19.2 ~490m) from Eschenberg Obs. (Jan. 13.76-77p3)
K01W01T 2001 WT1 (arc=3 opp, H=19.8 ~371m) from Naef Obs. (Jan. 13.81-83p2)
K00Y29J 2000 YJ29 (i=43.6°, q=0.327 AU, arc=2 opp, H=17.9 ~891m) from Great Shefford Obs. (Jan. 13.81-83p3)
K3471 203471 2002 AU4 from Sormano Obs. (Jan. 11.89p2)
G2900 162900 2001 HG31 from Thompsonville Obs. (Jan. 14.13-14p6)
F4715 154715 2004 LB6 from Naef Obs. (Jan. 13.88-89p2)
E1765 141765 2002 MP3 from Naef Obs. (Jan. 13.80-85p3)
E1052 141052 2001 XR1 from Walnut Creek Obs. (Jan. 13.25-26p3)
04544 4544 Xanthus (1989 FB) from Thompsonville Obs. (Jan. 14.06-09p6)
03554 3554 Amun (1986 EB) from Panker Obs. (Dec. 30.72-74p3)
01980 1980 Tezcatlipoca (1950 LA) from Thompsonville Obs. (Jan. 14.02-03p6)
01864 1864 Daedalus (1971 FA) from Eschenberg Obs. (Jan. 13.74p6)
01627 1627 Ivar (1929 SH) from Thompsonville Obs. (Jan. 14.10-11p6)

Observers on 14 January '09

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`215`	Buchloe Obs. in Germany, 1 in MPEC 2009-A69 -- P/2008 Y1
`151`	Eschenberg Obs. in Switzerland, 2 in MPEC 2009-A68 -- 2003 XB22, 1864
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 136849
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-A68 -- 2000 YJ29
`A17`	Guidestar Obs. in Germany, 2 in MPEC 2009-A68 -- 2009 AM, 2008 YG3
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2009-A68 -- 2009 AL, 2008 YU32
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-A68 -- 2008 RT26
`A13`	Naef Obs. in Switzerland, 3 in MPEC 2009-A68 -- 2001 WT1, 154715, 141765
`A32`	Panker Obs. in Germany, 1 in MPEC 2009-A68 -- 3554
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-A69 -- P/2008 Y1
`E12`	Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2009-A68 -- 2009 AM15, 2009 AK15, 2008 YA, 2008 EA32, 2004 XY60
`587`	Sormano Obs. in Italy, 1 in MPEC 2009-A68 -- 203471
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2009-A69 -- P/2008 Y1
`H53`	Thompsonville Obs. in Illinois, 4 in MPEC 2009-A68 -- 162900, 4544, 1980, 1627
`G56`	Walnut Creek Obs. in northern California, 1 in MPEC 2009-A68 -- 141052

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

Impact Risk Monitoring on 14 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

2009 AM15	NEODyS	1410	R E M O V E D						-

2009 AL	JPL Sentry	2303	2049-2106	8	4.8e-07	-4.81	-5.08	0	JPL #2 for the day: "Analysis based on 25 observations spanning 1.8705 days (2009-Jan-01.29931 to 2009-Jan-03.16982)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
2009 AL	NEODyS	1410	2057-2090	2	7.79e-07	-4.43	-4.43	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/14.169."

2008 YU32	JPL Sentry	2303	2013-2103	57	4.2e-07	-3.26	-3.70	0	JPL #2 for the day: "Analysis based on 19 observations spanning 3.0513 days (2008-Dec-31.10188 to 2009-Jan-03.15316)." Diameter approximately 0.373 km. from mean, weighted H=19.8.
2008 YU32	NEODyS	1410	2026-2085	14	9.51e-07	-3.00	-3.31	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2008/12/31.103 to 2009/01/14.143."

2008 TS10	JPL Sentry	2303	2040-2103	54	2.1e-05	-6.88	-7.58	0	JPL: "Analysis based on 15 observations spanning 1.1091 days (2008-Oct-08.36174 to 2008-Oct-09.47079)." Diameter approximately 0.006 km. from mean, weighted H=28.7.

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 14 January '09

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

2303	Noted that JPL Sentry has updated its 2008 TS10 risk assessment - see above Noted that JPL Sentry has updated its 2008 YU32 risk assessment - see above Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
1958	Noted Radar Astrometry database update - see above
1700	Grabbed MPEC 2009-A69 - Comet P/2008 Y1 (Boattini) - see above
1410	Noted that JPL Sentry has updated its 2008 YU32 risk assessment - see above Noted that NEODyS has updated its 2008 YU32 risk assessment - see above Noted that JPL Sentry has updated its 2009 AL risk assessment - see above Noted that NEODyS has updated its 2009 AL risk assessment - see above Noted that NEODyS has removed 2009 AM15 as an impact risk - see above Grabbed MPEC 2009-A68 - Daily Orbit Update - see above

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