2009-01-25 Tracking News

Contents on 25 January '09

IAU Minor Planet Center
- NEOCP Activity -- six listings: 2 new, 4 updated
- New MPECs -- two MPECs
Observers -- seven 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 25 January '09

The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated

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

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 25 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-B51 time-stamped "07:05 UT" - Daily Orbit Update - see below
MPEC 2009-B52 time-stamped "21:23 UT" - 2004 SV55 = 1983 SN

MPEC 2009-B52 - "21:23 UT" - 2004 SV55 = 1983 SN

K04S55V 2004 SV55 (i=41.2°, H=18.1 ~812m) from LINEAR (Jan. 25.46-51p5)

<< DOU on 25 Jan. '09 >> MPEC 2009-B51 - "07:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K09A00L 2009 AL (almost small, Q=4.140 AU, arc=24 days, H=21.8 ~148m) from the Spacewatch 1.8m telescope (Jan. 25.12-13p3)
Observations of small asteroids (H>22.0)
K09B05O 2009 BO5 (arc=4 days, H=26.8 ~15m) from Schiaparelli Obs. (Jan. 22.08-09p2 & 22.15p1)
Observations of other objects
K09B02M 2009 BM2 (Q=4.254 AU, arc=6 days, H=19.8 ~371m) from Schiaparelli Obs. (Jan. 22.16p2) and Hamamatsu-Yuto Obs. (Jan. 24.73-76p8)
K09A16F 2009 AF16 (arc=9 days, H=21.2 ~195m) from Cyclops Obs. (Jan. 23.85p1 & 23.93p1)
K09A16D 2009 AD16 (Q=4.191 AU, arc=9 days, H=20.5 ~269m) from Schiaparelli Obs. (Jan. 22.11-12p5) and Hamamatsu-Yuto Obs. (Jan. 24.56-57p3 & 24.62p1)
K08X01B 2008 XB1 (arc=53 days, H=20.9 ~224m) from Spacewatch 1.8m (Jan. 25.19-20p3)
K08U05W 2008 UW5 (arc=91 days, H=18.1 ~812m) from Spacewatch 1.8m (Jan. 25.10p2)
K08U00C 2008 UC (arc=98 days, H=18.9 ~562m) from Thompsonville Obs. (Jan. 25.05-06p6)
K08Q03T 2008 QT3 (arc=153 days, H=18.9 ~562m) from Hamamatsu-Yuto Obs. (Jan. 24.46-50p4)
K08M05B 2008 MB5 (arc=209 days, H=19.2 ~490m) from Thompsonville Obs. (Jan. 25.21p5)
K08E05V 2008 EV5 (arc=2 opp, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Jan. 24.51-55p10)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from Hamamatsu-Yuto Obs. (Jan. 24.77-80p5)
K06A02S 2006 AS2 (arc=4 opp, H=20.4 ~282m) from Hamamatsu-Yuto Obs. (Jan. 24.65-67p8) and Thompsonville Obs. (Jan. 25.16-17p6)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (Jan. 24.68-69p5)
K01B16J 2001 BJ16 (arc=4 opp, H=18.5 ~676m) from Purple Mtn. Obs. XuYi Station (XuYi Sta.) (Jan. 24.73-78p4)
K00Y29J 2000 YJ29 (i=43.6°, q=0.327 AU, arc=2 opp, H=17.9 ~891m) from Spacewatch 1.8m (Jan. 25.16-17p3)
K00B19L 2000 BL19 (Q=4.472 AU, arc=2 opp, H=19.8 ~371m) from Thompsonville Obs. (Jan. 25.18-20p6)
J99C08W 1999 CW8 (arc=3 opp, H=18.6 ~645m) from XuYi Sta. (Jan. 24.56-60p4)
J8752 198752 2005 EA60 from XuYi Sta. (Jan. 24.73-78p4)
04179 4179 Toutatis (1989 AC) from Hamamatsu-Yuto Obs. (Jan. 24.71-72p9)

Observers on 25 January '09

Seven observing facilities appear in today's MPECs.

Code	Observer / observatory
`B84`	Cyclops Obs. in The Netherlands, 1 in MPEC 2009-B51 -- 2009 AF16
`379`	Hamamatsu-Yuto Obs. in Japan, 8 in MPEC 2009-B51 -- 2009 BM2, 2009 AD16, 2008 QT3, 2008 EV5, 2006 WZ2, 2006 AS2, 2005 BC, 4179
`704`	LINEAR in New Mexico, 1 in MPEC 2009-B52 -- 2004 SV55
`D29`	Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 3 in MPEC 2009-B51 -- 2001 BJ16, 1999 CW8, 198752
`204`	Schiaparelli Obs. in Italy, 3 in MPEC 2009-B51 -- 2009 BO5, 2009 BM2, 2009 AD16
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-B51 -- 2009 AL, 2008 XB1, 2008 UW5, 2000 YJ29
`H53`	Thompsonville Obs. in Illinois, 4 in MPEC 2009-B51 -- 2008 UC, 2008 MB5, 2006 AS2, 2000 BL19

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

Impact Risk Monitoring on 25 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.
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 some objects with impact solutions beyond 100 years.
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 AL	JPL Sentry	1625	2090	1	5.9e-08	-5.89	-5.89	0	JPL: "Analysis based on 50 observations spanning 23.832 days (2009-Jan-01.29931 to 2009-Jan-25.13085)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
2009 AL	NEODyS	1625	2090	1	6.77e-08	-5.83	-5.83	0	NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/25.132."

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 25 January '09

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

2137	Grabbed MPEC 2009-B52 - 2004 SV55 = 1983 SN - see above
1625	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 Grabbed MPEC 2009-B51 - Daily Orbit Update - see above Noted that the NEOCP has become active

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