Contents  on 28 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 28 January '09

The MPC's NEO Confirmation Page has 10 listings: 1 new, 9 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and nine 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 28 January '09

Minor Planet Electronic Circulars

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


MPEC 2009-B67 - "21:22 UT" - Comets C/2008 U6, 2008 U7, 2008 U8, 2008 U9 (SOHO)


MPEC 2009-B66 - "21:17 UT" - Comets C/2008 U2, 2008 U3, 2008 U4, 2008 U5 (SOHO)


<< DOU on 28 Jan. '09 >>  MPEC 2009-B65 - "07:05 UT" - Daily Orbit Update

Observers  on 28 January '09

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B09Capannoli Obs. in Italy, 2 in MPEC 2009-B65 -- 2009 BM2, 2009 AD16
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-B65 -- 2009 AD16, 2008 QT3, 2008 EV5, 2006 WZ2, 2006 AS2, 4179
704LINEAR in New Mexico, 5 in MPEC 2009-B65 -- 2009 BR5, 2004 NL8, 203217, 3122, 2061
474Mt. John Obs. in New Zealand, 4 in MPEC 2009-B65 -- 2009 BH11, 2009 BG11, 2009 BC11, 2009 AK15
A13Naef Obs. in Switzerland, 1 in MPEC 2009-B65 -- 111253
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 2 in MPEC 2009-B65 -- 163014, 4183
H06\B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B65 -- 2008 YR27
204Schiaparelli Obs. in Italy, 3 in MPEC 2009-B65 -- 2009 BG11, 2008 MB5, 2006 AS2
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-B65 -- 2009 BG11, 2008 YA, 2004 XY60
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-B66 & 2009-B67 -- C/2008 U9, C/2008 U8, C/2008 U7, C/2008 U6, C/2008 U5, C/2008 U4, C/2008 U3, C/2008 U2
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPECs 2009-B66 & 2009-B67 -- C/2008 U7, C/2008 U4
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-B65 -- 2009 BC, 2003 RB, 8013, 7358
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-B65 -- 2009 BC, 2009 AL15, 2009 AL, 2008 YA, 2008 XN
926Tenagra II Obs. in Arizona, 2 in MPEC 2009-B65 -- 2009 BC11, 2009 AV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 January '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 and JPL at 2359 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 Sentry14172059-210877.2e-07-4.55-4.650JPL: "Analysis based on 26 observations spanning 6.9589 days (2009-Jan-20.45513 to 2009-Jan-27.414)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
NEODyS14172025-207878.26e-07-4.49-4.590NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/27.415."
2009 ALJPL Sentry1417209019.4e-10-7.69-7.690JPL: "Analysis based on 55 observations spanning 26.838 days (2009-Jan-01.29931 to 2009-Jan-28.13701)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
NEODyS1417R E M O V E D-
2004 XY130JPL Sentry2359R E M O V E DJPL: Risk listing removed at 1200 UTC 29 Oct..

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 28 January '09

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

2359Noted that JPL Sentry has removed 2004 XY130 as an impact risk - see above
2159Grabbed MPEC 2009-B66 - Comets C/2008 U2, 2008 U3, 2008 U4, 2008 U5 (SOHO) - see above
Grabbed MPEC 2009-B67 - Comets C/2008 U6, 2008 U7, 2008 U8, 2008 U9 (SOHO) - see above
1417Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted that NEODyS 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-B65 - Daily Orbit Update - see above