Contents  on 20 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 20 January '09

The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 37 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 20 January '09

Minor Planet Electronic Circulars

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


MPEC 2009-B31 - "23:17 UT" - 2009 BW2


MPEC 2009-B30 - "19:07 UT" - 2009 BN2


MPEC 2009-B29 - "19:05 UT" - 2009 BM2


MPEC 2009-B28 - "19:02 UT" - 2009 BL2


MPEC 2009-B27 - "18:57 UT" - 2009 BK2


MPEC 2009-B26 - "18:51 UT" - 2009 BJ2


MPEC 2009-B25 - "18:48 UT" - 2009 BH2


MPEC 2009-B24 - "18:46 UT" - 2009 BG2


MPEC 2009-B23 - "18:43 UT" - 2009 BF2


MPEC 2009-B22 - "18:40 UT" - 2009 BE2


MPEC 2009-B21 - "17:14 UT" - 2009 AU16


<< DOU on 20 Jan. '09 >>  MPEC 2009-B20 - "07:05 UT" - Daily Orbit Update

Observers  on 20 January '09

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-B22 -- 2009 BE2
B75Betelgeuse Station in Italy, 7 in MPEC 2009-B20 -- 2008 UE7, 2006 SZ217, 2005 TZ51, 53430, 162900, 1627, 1620
493Calar Alto Obs. in Spain, 6 in MPECs 2009-B22, 2009-B23, 2009-B24, 2009-B25, 2009-B28 & 2009-B29 -- 2009 BM2, 2009 BL2, 2009 BH2, 2009 BG2, 2009 BF2, 2009 BE2
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-B20, 2009-B26, 2009-B29 & 2009-B31 -- 2009 BW2, 2009 BM2, 2009 BJ2, 2009 BD, 36284
B84Cyclops Obs. in The Netherlands, 1 in MPEC 2009-B20 -- 3200
F654Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-B28 -- 2009 BL2
J95Great Shefford Obs. in England, 8 in MPECs 2009-B20, 2009-B23, 2009-B25, 2009-B26, 2009-B28, 2009-B29 & 2009-B31 -- 2009 BW2, 2009 BM2, 2009 BL2, 2009 BJ2, 2009 BH2, 2009 BF2, 2009 BE, 2009 BD
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-B20 -- 2009 AD16, 2008 EV5, 2005 BC
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-B21 -- 2009 AU16
H05Kline Obs. in Colorado, 1 in MPEC 2009-B29 -- 2009 BM2
704LINEAR in New Mexico, 9 in MPECs 2009-B20, 2009-B23, 2009-B25 & 2009-B28 -- 2009 BL2, 2009 BH2, 2009 BF2, 2005 NJ1, 85867, 194386, 187026, 3199, 1627
J75La Sagra Obs. in Spain, 3 in MPEC 2009-B20 -- 2006 AS2, 7358, 4179
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2009-B22, 2009-B23, 2009-B24, 2009-B25, 2009-B26, 2009-B27, 2009-B28, 2009-B29, 2009-B30 & 2009-B31 -- 2009 BW2, 2009 BN2, 2009 BM2, 2009 BL2, 2009 BK2, 2009 BJ2, 2009 BH2, 2009 BG2, 2009 BF2, 2009 BE2
900Moriyama Obs. in Japan, 2 in MPECs 2009-B25 & 2009-B29 -- 2009 BM2, 2009 BH2
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-B20, 2009-B24, 2009-B27, 2009-B28, 2009-B29 & 2009-B30 -- 2009 BN2, 2009 BM2, 2009 BL2, 2009 BK2, 2009 BG2, 2005 YX128, 2002 EB3, 155334
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B29 -- 2009 BM2
854Sabino Canyon Obs. in Arizona, 6 in MPECs 2009-B23, 2009-B25, 2009-B26, 2009-B28, 2009-B29 & 2009-B31 -- 2009 BW2, 2009 BM2, 2009 BL2, 2009 BJ2, 2009 BH2, 2009 BF2
H36Sandlot Obs. in Kansas, 2 in MPECs 2009-B23 & 2009-B25 -- 2009 BH2, 2009 BF2
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-B20 & 2009-B21 -- 2009 AU16, 2009 AM15, 2009 AK15
510Siegen Obs. in Germany, 3 in MPEC 2009-B20 -- 136849, 4179, 1864
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2009-B20 & 2009-B22 -- 2009 BE2, 2009 AL, 2008 YU32, 2008 YT30, 2008 XN, 2008 WZ13, 2008 WK32, 2008 SX7
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-B20 -- 2009 AD16
926Tenagra II Obs. in Arizona, 4 in MPECs 2009-B20, 2009-B23 & 2009-B25 -- 2009 BH2, 2009 BG, 2009 BF2, 2009 AG16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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 BE2JPL Sentry21122013-2099103.2e-09-5.14-5.430JPL: "Analysis based on 30 observations spanning 3.9651 days (2009-Jan-16.26198 to 2009-Jan-20.22712)." Diameter approximately 0.540 km. from mean, weighted H=19.0.
2009 BENEODyS14222058-2090182.63e-04-4.20-4.430NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2009/01/16.362 to 2009/01/19.971."
JPL Sentry14212058-2108192.9e-04-4.17-4.420JPL: "Analysis based on 50 observations spanning 3.6092 days (2009-Jan-16.36105 to 2009-Jan-19.97022)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
2009 BDNEODyS14222053-2090774.6e-04-5.36-5.900NEODyS: "Based on 78 optical observations (of which 1 are rejected as outliers) from 2009/01/16.277 to 2009/01/20.255."
JPL Sentry14212054-2061102.7e-04-5.56-5.890JPL: "Analysis based on 77 observations spanning 3.9781 days (2009-Jan-16.27641 to 2009-Jan-20.25446)." Diameter approximately 0.007 km. from mean, weighted H=28.6.
2009 ALNEODyS1422209011.65e-07-5.43-5.430NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/20.173."
JPL Sentry14212090-210622.0e-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.

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 20 January '09

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

2358Grabbed MPEC 2009-B31 - 2009 BW2 - see above
2112Noted that JPL Sentry has posted 2009 BE2 as an impact risk - see above
1929Grabbed MPEC 2009-B29 - 2009 BM2 - see above
1928Grabbed MPEC 2009-B27 - 2009 BK2 - see above
Grabbed MPEC 2009-B28 - 2009 BL2 - see above
Grabbed MPEC 2009-B30 - 2009 BN2 - see above
1859Grabbed MPEC 2009-B24 - 2009 BG2 - see above
Grabbed MPEC 2009-B25 - 2009 BH2 - see above
Grabbed MPEC 2009-B26 - 2009 BJ2 - see above
1858Grabbed MPEC 2009-B22 - 2009 BE2 - see above
Grabbed MPEC 2009-B23 - 2009 BF2 - see above
1829Grabbed MPEC 2009-B21 - 2009 AU16 - see above
1422Noted that NEODyS has updated its 2009 AL risk assessment - see above
Noted that NEODyS has updated its 2009 BD risk assessment - see above
Noted that NEODyS has updated its 2009 BE risk assessment - see above
1421Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted 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
Grabbed MPEC 2009-B20 - Daily Orbit Update - see above