Contents  on 29 January '09

Resources:

The latest A/CC news is available via framed access, RSS news feed 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 29 January '09

The MPC's NEO Confirmation Page has 19 listings: 3 new, 16 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and sixteen updated listings. Of these, six 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 29 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-B71 - "23:27 UT" - Comets C/2008 U13, 2008 U14, 2008 U15, 2008 U16 (SOHO)


MPEC 2009-B70 - "23:16 UT" - Comets C/2008 U6, 2008 U10, 2008 U11, 2008 U12 (SOHO)


<< DOU on 29 Jan. '09 >>  MPEC 2009-B69 - "07:06 UT" - Daily Orbit Update


MPEC 2009-B68 - "04:26 UT" - 2005 YR3

Observers  on 29 January '09

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 3 in MPEC 2009-B69 -- 2009 BM2, 2009 AD16, 2008 QT3
703Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2009-B69 -- 2009 BT5, 2009 BM2, 2009 BC11, 2008 UC95, 2005 TZ51, 2004 SV55, 2002 VY94, 25916, 22753, 20460, 198752, 137925, 12923, 4179
704LINEAR in New Mexico, 11 in MPEC 2009-B69 -- 2009 AF16, 2005 TZ51, 2005 NJ1, 2004 SV55, 2002 BK25, 85867, 22771, 22099, 200840, 4183, 2368
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2009-B69 -- 2008 UE7
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-B68 -- 2005 YR3
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2009-B69 -- 1627
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-B69 -- 85953
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPECs 2009-B70 & 2009-B71 -- C/2008 U16, C/2008 U15, C/2008 U14, C/2008 U13, C/2008 U12, C/2008 U11, C/2008 U10
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPECs 2009-B70 & 2009-B71 -- C/2008 U13, C/2008 U11
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2009-B69 -- 2009 BT5, 2009 BR5, 2009 BP5, 2009 AL15, 2009 AL, 2008 XO2, 2008 VA15, 2000 YJ29
A78Stia Obs. in Italy, 1 in MPEC 2009-B69 -- 2009 AF16
G56Walnut Creek Obs. in northern California, 2 in MPEC 2009-B69 -- 2009 BM2, 2008 QT3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 BR5JPL Sentry14262059-206321.3e-07-5.31-5.370JPL: "Analysis based on 28 observations spanning 7.8755 days (2009-Jan-20.45513 to 2009-Jan-28.33061)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS14262059-207821.65e-07-5.21-5.250NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/28.331."
2009 BENEODyS21492037-2090165.88e-04-3.94-4.180NEODyS: "Based on 86 optical observations (of which 5 are rejected as outliers) from 2009/01/16.362 to 2009/01/22.397."
2009 ALJPL Sentry1426R E M O V E DJPL: Risk listing removed at 0949 UTC.
2005 YR3NEODyS1426R E M O V E D-
JPL Sentry1426R E M O V E DJPL: Risk listing removed at 0612 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 29 January '09

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

2358Grabbed MPEC 2009-B70 - Comets C/2008 U6, 2008 U10, 2008 U11, 2008 U12 (SOHO) - see above
Grabbed MPEC 2009-B71 - Comets C/2008 U13, 2008 U14, 2008 U15, 2008 U16 (SOHO) - see above
2149Noted that NEODyS has updated its 2009 BE risk assessment - see above
1426Noted that JPL Sentry has removed 2005 YR3 as an impact risk - see above
Noted that NEODyS has removed 2005 YR3 as an impact risk - see above
Noted that JPL Sentry has removed 2009 AL as an impact risk - see above
Noted that JPL Sentry has updated its 2009 BR5 risk assessment - see above
Noted that NEODyS has updated its 2009 BR5 risk assessment - see above
Grabbed MPEC 2009-B69 - Daily Orbit Update - see above
0433Grabbed MPEC 2009-B68 - 2005 YR3 - see above