Contents  on 31 January '12

Note: These A/CC news pages will update less often and less regularly than usual through Thursday, February 2nd, and possibly later.

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.

Traffic Report  on 31 January '12

Two objects reported inside ten LD

There are two objects reported passing inside ten lunar distances (LD) of our planet today. 2012 BD14 is heading out from 5.79 to 6.04 LD and intruder 2012 BX34 is departing, traveling from 7.11 to 9.21 LD, and 2012 BA102 departs from ten LD tomorrow. Next up, radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 2325 UTC with follow-up for 2012 BD14 in radar and today's DOU MPEC, approaching 2011 CP4 has been recovered (MPEC), 2012 BA102 has been discovered (MPEC), and there is follow-up in today's DOU for 2012 BO11 and distant 207398 2006 AS2. This report was previously updated at 0031 UTC.


Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline plus current additional details, sky chart, and ephemerides.

Radar Astrometry  on 31 January '12

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0023 UTC when the database was dated 30 Jan.


Data update noted at 2359 UTC when the database was dated 31 Jan.



Photometry is needed for upcoming radar targets and also some astrometry. See Arecibo and Goldstone schedules.

NEOCP Activity  on 31 January '12

The MPC's NEO Confirmation Page has 46 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 46 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 101 listings on the NEOCP today.

New MPECs  on 31 January '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-B115 - "19:38 UT" - 2012 BC102


MPEC 2012-B114 - "19:26 UT" - 2012 BB102


MPEC 2012-B113 - "19:23 UT" - 2012 BA102


MPEC 2012-B112 - "18:03 UT" - 2011 CP4


MPEC 2012-B111 - "15:32 UT" - P/2003 T12 = 2012 A3 (SOHO)


<< DOU on 31 Jan. '12 >>  MPEC 2012-B110 - "06:05 UT" - Daily Orbit Update

Observers  on 31 January '12

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2012 BD14, 7341
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-B110 & 2012-B112 -- 2012 BX13, 2012 BM77, 2012 BK77, 2012 BJ11, 2012 BF14, 2012 BD27, 2012 BD14, 2012 BB77, 2012 BB2, 2012 AE1, 2012 AA11, 2011 SF25, 2011 CP4
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2012-B110 -- 29075, 162186
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2012-B110 -- 2012 AE1, 2011 WV134, 2006 MJ10, 85839, 163000, 154269, 101873, 4055, 3103
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-B110 -- 2011 YJ28
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-B110 -- 2012 BN77, 2011 UU106, 163760
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-B110 -- 2012 BJ11
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-B110 -- 1999 AU23
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 7341
J95Great Shefford Obs. in England, 2 in MPEC 2012-B110 -- 2012 BJ86, 2012 BF77
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2012-B110 -- 2008 WZ13
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-B110 -- 3103
704LINEAR in New Mexico, 10 in MPECs 2012-B110, 2012-B113 & 2012-B115 -- 2012 BC102, 2012 BA102, 2008 AB31, 35396, 21277, 192642, 162038, 138911, 1627, 1221
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-B110 & 2012-B114 -- 2012 BB102, 101955
900Moriyama Obs. in Japan, 1 in MPEC 2012-B113 -- 2012 BA102
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2012-B110, 2012-B113, 2012-B114 & 2012-B115 -- 2012 BC102, 2012 BB102, 2012 BA102, 2005 CV25, 2002 BF25, 2002 AW, 221455, 207398, 154007, 143651, 142348, 141018
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-B110 -- 1999 AU23
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-B112 -- 2011 CP4
A24New Millennium Obs. in Italy, 1 in MPEC 2012-B110 -- 101873
J69North Obs. in England, 1 in MPEC 2012-B110 -- 433
557Ondrejov Obs. in the Czech Republic, 2 in MPEC 2012-B110 -- 3554, 1620
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-B110 -- 138155
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-B110 -- 2012 BT23, 2012 AE1, 2011 YU74, 2011 SL102, 2008 QY, 2008 GE1, 2006 VY13, 263976, 143651, 142563, 141018, 138524
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-B111 -- P/2003 T12
233San Vito Obs. in Italy, 1 in MPEC 2012-B110 -- 1866
645Sloan Digital Sky Survey (SDSS) in New Mexico, 60 in MPEC 2012-B110 -- 2009 TV4, 2009 RD4, 2009 OC, 2009 LX, 2009 BT5, 2008 TK157, 2008 SO, 2008 RX24, 2008 QC, 2008 OX8, 2008 MH1, 2008 JO24, 2008 GE110, 2008 AG33, 2007 TW68, 2007 DM41, 2007 DB56, 2006 WN1, 2006 QX5, 2005 XW77, 2005 WP57, 2005 SG19, 2005 QS176, 2005 QG30, 2005 HB, 2005 EZ169, 2004 RS25, 2004 RD84, 2004 QG20, 2004 MP3, 2003 UP25, 2003 SC11, 2003 RW10, 2003 BN4, 2002 XO1, 2002 MY, 2002 GF1, 2002 BP26, 2002 AH29, 2001 VJ5, 2001 DS8, 1999 VN6, 69230, 65803, 276786, 256004, 24445, 19356, 190491, 189973, 189700, 185853, 163760, 163000, 159923, 154991, 14402, 138847, 137044, 5587
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-B110 -- 2012 BO11, 10636
291Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2012-B110 -- 2012 BU61, 2012 BR23, 2012 BN11, 2012 BL77, 2012 BK11, 2012 BF11, 2012 AC11, 2011 YM63, 2011 YA63, 2003 DE6, 2001 AO2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 January '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 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
2012 BA102JPL Sentry21302093-211232.4e-06-6.77-6.870JPL: "Analysis based on 11 observations spanning 1.3960 days (2012-Jan-30.21365 to 2012-Jan-31.60961)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2012 BM86NEODyS19342042-208342.3e-09-6.87-7.290NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2012-01-29.558 to 2012-01-30.458."
2012 BJ86JPL Sentry19342085-2108101.2e-06-4.40-4.800JPL: "Analysis based on 28 observations spanning 1.7489 days (2012-Jan-29.10142 to 2012-Jan-30.8503)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
NEODyS19342085-209031.74e-07-5.17-5.180NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-01-30.851."
2012 BU61JPL Sentry19342031-2099172.1e-06-3.59-3.910JPL: "Analysis based on 29 observations spanning 5.0370 days (2012-Jan-26.0941 to 2012-Jan-31.13115)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
NEODyS19342069-209063.19e-06-3.47-3.590NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-01-26.095 to 2012-01-31.132."
2012 BO11NEODyS19342076-207616.0e-09-8.82-8.820NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2012-01-19.493 to 2012-01-30.287."
JPL Sentry1934R E M O V E DJPL: Risk listing removed at 0853 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 31 January '12

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

2359Noted Radar Astrometry database update - see above
2325Updated Traffic Report
2130Noted that JPL Sentry has posted 2012 BA102 as an impact risk - see above
Grabbed MPEC 2012-B115 - 2012 BC102 - see above
1934Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above
Noted that NEODyS has posted 2012 BJ86 as an impact risk - see above
Noted that NEODyS has posted 2012 BM86 as an impact risk - see above
Noted that JPL Sentry has removed 2012 BO11 as an impact risk - see above
Noted that NEODyS has reposted 2012 BO11 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 BU61 risk assessment - see above
Noted that NEODyS has updated its 2012 BU61 risk assessment - see above
Grabbed MPEC 2012-B110 - Daily Orbit Update - see above
Grabbed MPEC 2012-B111 - P/2003 T12 = 2012 A3 (SOHO) - see above
Grabbed MPEC 2012-B112 - 2011 CP4 - see above
Grabbed MPEC 2012-B113 - 2012 BA102 - see above
Grabbed MPEC 2012-B114 - 2012 BB102 - see above
0023Noted Radar Astrometry database update - see above