Contents  on 1 February '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 1 February '09

The MPC's NEO Confirmation Page has 11 listings: 2 new, 9 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and nine updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of thirteen 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 1 February '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.


<< DOU on 1 Feb. '09 >>  MPEC 2009-C02 - "07:07 UT" - Daily Orbit Update


MPEC 2009-C01 - "01:36 UT" - 2001 DR8

Observers  on 1 February '09

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 29 in MPEC 2009-C02 -- 2009 BW2, 2009 BU5, 2009 BQ5, 2009 BK58, 2009 BJ58, 2009 BH2, 2009 BH11, 2009 BG11, 2009 BD77, 2009 BB11, 2009 BB, 2009 AG16, 2009 AC16, 2008 YN27, 2008 YG26, 2008 YE3, 2008 YE29, 2008 XQ2, 2008 XP2, 2008 XP, 2008 XO2, 2008 WN2, 2008 WC14, 2008 SV11, 2008 RM98, 2008 OB9, 2008 EV5, 2002 JD109, 2000 GV147
A81Balzaretto Obs. in Italy, 2 in MPEC 2009-C02 -- 2009 BD58, 2009 AD16
493Calar Alto Obs. in Spain, 1 in MPEC 2009-C01 -- 2001 DR8
160Castelmartini Obs. in Italy, 3 in MPEC 2009-C02 -- 2009 AF16, 2006 AS2, 101873
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2009-C02 -- 2009 BK58, 2005 WS55, 85938, 68350, 52768, 36284, 153953, 143651, 8567, 1863
924Cegep de Trois-Rivieres Obs. in Quebec, 1 in MPEC 2009-C02 -- 2006 AS2
B84Cyclops Obs. in The Netherlands, 2 in MPEC 2009-C02 -- 2002 VY94, 1620
B60Deep Sky Obs. in Germany, 1 in MPEC 2009-C02 -- 4544
448Desert Moon Obs. in New Mexico, 2 in MPEC 2009-C02 -- 2008 YG3, 189973
808El Leoncito Obs. in Argentina, 4 in MPEC 2009-C02 -- 2006 SZ217, 35107, 153306, 5332
J95Great Shefford Obs. in England, 3 in MPECs 2009-C01 & 2009-C02 -- 2009 BK58, 2009 BJ58, 2001 DR8
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-C02 -- 2009 BM2, 2008 QT3, 2008 EV5, 2006 WZ2, 2006 AS2, 4179
185Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2009-C02 -- 2009 BK71
704LINEAR in New Mexico, 19 in MPEC 2009-C02 -- 2009 BT5, 2009 BM58, 2008 YR27, 2008 UC, 2006 AS2, 1999 AQ10, 1994 AW1, 89355, 20460, 162004, 142348, 137925, 111253, 10302, 7480, 7088, 6050, 3200, 2368
A70Lumijoki Obs. in Finland, 1 in MPEC 2009-C02 -- 2009 BM2
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-C02 -- 2009 BK58
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPEC 2009-C02 -- 2009 BT5, 2009 BM58, 2009 BG58, 2009 BE58, 2009 BD77, 85867, 39796, 22771, 203217, 163696, 2061
A24New Millennium Obs. in Italy, 1 in MPEC 2009-C02 -- 2009 BO58
423North Ryde Obs. in New South Wales, 1 in MPEC 2009-C02 -- 1917
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2009-C02 -- 2009 BM2, 2009 BD58, 2009 AF16, 2008 XE2, 2008 QT3, 2006 AS2, 2003 XB22, 2001 DV8, 2000 BL19, 1999 CW8
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-C02 -- 1863
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-C02 -- 2009 BH58, 2009 BG11, 2009 AK, 2008 YE30, 2004 EU9, 4596
587Sormano Obs. in Italy, 3 in MPEC 2009-C02 -- 2009 BG58, 2009 BF58, 2009 BD58
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2009-C01 & 2009-C02 -- 2003 RB, 2001 DR8, 164202, 3122
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-C01 & 2009-C02 -- 2009 BS5, 2009 BR5, 2009 BH11, 2009 BF58, 2009 BE2, 2009 BC58, 2008 YU30, 2008 YS27, 2008 YG29, 2001 DR8
A78Stia Obs. in Italy, 4 in MPEC 2009-C02 -- 2009 BT5, 2009 BM2, 2008 YE29, 2000 BL19
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2009-C02 -- 35107, 141052
G56Walnut Creek Obs. in northern California, 2 in MPEC 2009-C02 -- 2008 YE29, 2008 UC95
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 February '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 impact solutions beyond 100 years for a few objects.
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 BJ58JPL Sentry15282016-2101541.4e-07-3.17-3.520JPL: "Analysis based on 42 observations spanning 2.6794 days (2009-Jan-29.13966 to 2009-Jan-31.81908)." Diameter approximately 0.520 km. from mean, weighted H=19.1.
NEODyS15282016-2085441.57e-07-3.30-3.870NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/01/29.140 to 2009/01/31.820."
2009 BF58JPL Sentry15282055-2109623.3e-04-4.94-5.360JPL: "Analysis based on 38 observations spanning 3.9463 days (2009-Jan-28.26267 to 2009-Feb-01.20893)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS15282055-2090302.09e-04-5.08-5.380NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/01.210."
2009 BC58JPL Sentry1528R E M O V E DJPL: Risk listing removed at 1028 UTC.
NEODyS1528R E M O V E D-
2009 BR5JPL Sentry15282059-207833.1e-07-5.00-5.240JPL: "Analysis based on 34 observations spanning 10.855 days (2009-Jan-20.45513 to 2009-Jan-31.3098)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS15282059-207833.31e-07-4.97-5.170NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/31.311."

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 1 February '09

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

1528Noted that JPL Sentry has removed 2009 BC58 as an impact risk - see above
Noted that NEODyS has removed 2009 BC58 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 BF58 risk assessment - see above
Noted that NEODyS has updated its 2009 BF58 risk assessment - see above
Noted that JPL Sentry has updated its 2009 BJ58 risk assessment - see above
Noted that NEODyS has updated its 2009 BJ58 risk assessment - 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-C02 - Daily Orbit Update - see above
0516Grabbed MPEC 2009-C01 - 2001 DR8 - see above