Contents  on 22 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 22 January '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of three objects listed on the NEOCP at some point today.

New MPECs  on 22 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-B47 - "20:34 UT" - 2008 YV148


MPEC 2009-B46 - "16:36 UT" - Comet C/2009 B1 (Boattini)


<< DOU on 22 Jan. '09 >>  MPEC 2009-B45 - "07:05 UT" - Daily Orbit Update

Observers  on 22 January '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2009-B45 & 2009-B46 -- 2009 BW2, 2009 BL2, 2009 BK2, 2009 BE2, 2009 BD, 2009 BC, 2009 BB, C/2009 B1, 2009 AF16, 2009 AC16, 2008 YN27, 2008 YG26, 2008 YF3, 2008 YB29, 2008 WN2, 2008 TE157
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2009-B45, 2009-B46 & 2009-B47 -- C/2009 B1, 2008 YV148, 2008 EV5, 1864
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-B45 -- 2368
850Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2009-B45, 2009-B46 & 2009-B47 -- C/2009 B1, 2009 AE16, 2008 YV148
448Desert Moon Obs. in New Mexico, 7 in MPEC 2009-B45 -- 2009 AT, 2009 AM, 2009 AL15, 2009 AH16, 2008 UC95, 2005 SG19, 2000 OM
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-B46 -- C/2009 B1
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2009-B46 -- C/2009 B1
704LINEAR in New Mexico, 8 in MPEC 2009-B45 -- 2009 BM2, 2009 BG, 2008 SQ1, 2002 BK25, 55532, 14402, 12923, 2061
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-B46 -- C/2009 B1
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-B45 & 2009-B47 -- 2008 YV148, 2008 XE3, 163818
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2009-B45 -- 2009 BE, 2009 BB, 2009 AM, 2009 AD16, 2008 SQ1, 2008 QT3, 2008 EV5, 2006 AS2, 2003 XB22, 2001 WT1, 1999 CW8
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B46 -- C/2009 B1
H06\B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B45 -- 2009 AC16
I20Rio Cuarto Obs. in Argentina, 1 in MPEC 2009-B45 -- 2005 BC
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-B47 -- 2008 YV148
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-B46 & 2009-B47 -- C/2009 B1, 2008 YV148
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2009-B45 -- 162566
691Spacewatch 0.9m telescope in Arizona, 14 in MPECs 2009-B45 & 2009-B47 -- 2008 YV148, 2008 WL, 2008 VA15, 2007 TX18, 2006 BC10, 2006 AS2, 2003 RP8, 2003 RB, 2000 DV110, 204131, 18109, 175114, 163697, 159495
H53Thompsonville Obs. in Illinois, 4 in MPEC 2009-B45 -- 2008 UC95, 2008 QT3, 2006 WZ2, 2006 AS2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 posting a few special 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 BU5NEODyS14212011-2090455.56e-09-5.47-5.800NEODyS: "Based on 20 optical observations (of which 1 are rejected as outliers) from 2009/01/21.167 to 2009/01/21.278."
JPL Sentry05362011-2105382.3e-08-4.94-5.110JPL: "Analysis based on 20 observations spanning .11059 days (2009-Jan-21.16641 to 2009-Jan-21.277)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
2009 BR5NEODyS14212012-2089676.04e-07-4.09-4.560NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/21.469."
JPL Sentry05362015-21081556.4e-07-4.35-5.290JPL: "Analysis based on 10 observations spanning 1.0130 days (2009-Jan-20.45513 to 2009-Jan-21.46817)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2009 BP5NEODyS14212012-2079587.48e-07-3.92-4.180NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/01/20.404 to 2009/01/21.430."
JPL Sentry05362012-2106997.9e-07-3.94-4.250JPL: "Analysis based on 13 observations spanning 1.0262 days (2009-Jan-20.4031 to 2009-Jan-21.42928)." Diameter approximately 0.105 km. from mean, weighted H=22.5.
2009 BE2JPL Sentry1420R E M O V E DJPL #2 for the day: Risk listing removed at 0952 UTC.
2009 BENEODyS14212054-2090123.67e-04-4.09-4.340NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2009/01/16.362 to 2009/01/21.362."
JPL Sentry14202058-2108214.0e-04-4.06-4.330JPL #2 for the day: "Analysis based on 66 observations spanning 5.0002 days (2009-Jan-16.36105 to 2009-Jan-21.36129)." Diameter approximately 0.021 km. from mean, weighted H=26.0.
2009 BDNEODyS14212055-2090603.88e-04-5.44-5.890NEODyS: "Based on 84 optical observations (of which 1 are rejected as outliers) from 2009/01/16.277 to 2009/01/21.295."
JPL Sentry14202053-2108424.2e-04-5.42-5.890JPL #2 for the day: "Analysis based on 83 observations spanning 5.0182 days (2009-Jan-16.27641 to 2009-Jan-21.29465)." Diameter approximately 0.007 km. from mean, weighted H=28.6.
2009 ALJPL Sentry05362090-210622.0e-07-5.36-5.440JPL: "Analysis based on 47 observations spanning 18.873 days (2009-Jan-01.29931 to 2009-Jan-20.17216)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
2008 YU32JPL Sentry0536R E M O V E DJPL: Risk listing removed at 0954 UTC 16 Jan..
2008 YC3JPL Sentry05362088-210688.4e-07-6.67-6.850JPL: "Analysis based on 32 observations spanning 26.862 days (2008-Dec-22.25277 to 2009-Jan-18.11446)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
2007 RT9JPL Sentry0536R E M O V E DJPL: Risk listing removed at 1853 UTC 16 Jan..
99942 Apophis (2004 MN4)NEODyS19292036-2083102.16e-05-2.59-2.620NEODyS: "Based on 1000 optical observations (of which 5 are rejected as outliers) from 2004/03/15.108 to 2006/08/16.627, and also on seven radar data points on 2005/01/27, 2005/01/29, 2005/01/31, 2005/08/07 and 2006/05/06."
153814 2001 WN5NEODyS20502106-213331.31e-05-2.08-2.080NEODyS: "Based on 120 optical observations (of which 7 are rejected as outliers) from 1996/02/10.397 to 2009/01/02.211."
JPL Sentry1929213311.1e-05-2.13-2.13-JPL: "Analysis based on 116 observations spanning 4709.8 days (1996-Feb-10.39593 to 2009-Jan-02.21019)." Diameter approximately 0.780 km. from mean, weighted H=18.2.
101955 1999 RQ36NEODyS20512169-219987.12e-04-1.12-1.52-NEODyS: "Based on 290 optical observations (of which 8 are rejected as outliers) from 1999/09/11.407 to 2006/05/26.200, and also on 13 radar data points from 1999/09/21 to 2005/10/02."
JPL Sentry19292169-219987.1e-04-1.12-1.52-JPL: "Analysis based on 9 radar delay, 4 Doppler, and 295 optical observations spanning 2448.8 days (1999-Sep-11.4 to 2006-May-26.2)." Diameter approximately 0.560 km. from mean, weighted H=20.7.

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 22 January '09

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

2051Grabbed MPEC 2009-B47 - 2008 YV148 - see above
2050Noted that NEODyS has posted 101955 1999 RQ36 as an impact risk - see above
Noted that NEODyS has posted 153814 2001 WN5 as an impact risk - see above
1929Noted that JPL Sentry has posted 101955 1999 RQ36 as an impact risk - see above
Noted that JPL Sentry has posted 153814 2001 WN5 as an impact risk - see above
Noted that NEODyS has updated its 99942 2004 MN4 risk assessment - see above
1730Grabbed MPEC 2009-B46 - Comet C/2009 B1 (Boattini) - see above
1421Noted that NEODyS has updated its 2009 BD risk assessment - see above
Noted that NEODyS has updated its 2009 BE risk assessment - see above
1420Noted that JPL Sentry has updated its 2009 BD risk assessment - see above
Noted that JPL Sentry has updated its 2009 BE risk assessment - see above
Noted that JPL Sentry has removed 2009 BE2 as an impact risk - see above
Noted that NEODyS has posted 2009 BP5 as an impact risk - see above
Noted that NEODyS has posted 2009 BR5 as an impact risk - see above
Noted that NEODyS has posted 2009 BU5 as an impact risk - see above
Grabbed MPEC 2009-B45 - Daily Orbit Update - see above
0536Noted that JPL Sentry has removed 2007 RT9 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 YC3 risk assessment - see above
Noted that JPL Sentry has removed 2008 YU32 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted that JPL Sentry has reposted 2009 BD as an impact risk - see above
Noted that JPL Sentry has reposted 2009 BE as an impact risk - see above
Noted that JPL Sentry has reposted 2009 BE2 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 BP5 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 BR5 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 BU5 as an impact risk - see above