Contents  on 4 February '12

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 4 February '12

Two objects reported inside ten LD

Two asteroids are reported passing inside ten lunar distances (LD) of our planet today. Risk-listed 2012 CU exits ten LD, moving from 7.86 to 10.21 LD, and 2012 BD14 leaves ten LD, passing from 8.75 to 10.02 LD. Coming our way, radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 1621 UTC with follow-up in today's DOU MPEC for 2012 CU and departed 2012 BO11.


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.

NEOCP Activity  on 4 February '12

The MPC's NEO Confirmation Page has 20 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 21 listings on the NEOCP today.

New MPECs  on 4 February '12

Minor Planet Electronic Circulars

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


<< OOC on 4 Feb. '12 >> MPEC 2012-C24 - "19:21 UT" - Observations and Orbits of Comets


MPEC 2012-C23 - "16:10 UT" - Comet C/2012 B3 (La Sagra)


<< DOU on 4 Feb. '12 >>  MPEC 2012-C22 - "06:07 UT" - Daily Orbit Update

Observers  on 4 February '12

A total of 72 observers appear in today's MPECs.

CodeObserver / observatory
J97Alginet Obs. in Spain, 3 in MPEC 2012-C24 -- C/2010 S1, C/2008 FK75, 78P
J24Altamira Obs. in the Canary Islands, 9 in MPEC 2012-C24 -- C/2012 A2, P/2011 W2, C/2011 G1, C/2011 F1, C/2010 G2, C/2009 P1, 164P, 78P, 49P
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2012-C22 -- 2002 BF25
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2012-C24 -- P/2011 W2
I47Auger Obs. in Argentina, 1 in MPEC 2012-C24 -- C/2009 F4
B75Betelgeuse Station in Italy, 6 in MPEC 2012-C24 -- C/2012 A2, C/2011 G1, C/2011 F1, P/2010 JC81, 164P, 49P
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-C22 -- 2012 CU
B96Brixiis Obs. in Belgium, 8 in MPEC 2012-C24 -- C/2010 S1, P/2010 JC81, C/2010 G2, C/2009 P1, 246P, 244P, 164P, 29P
215Buchloe Obs. in Germany, 6 in MPEC 2012-C24 -- P/2011 VJ5, P/2010 UH55, P/2003 T12, 254P, 246P, 29P
160Castelmartini Obs. in Italy, 6 in MPEC 2012-C24 -- C/2011 Q4, C/2011 F1, P/2010 JC81, 244P, 164P, 49P
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2012-C22 & 2012-C24 -- 162421, 253P, 213P
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2012-C22 -- 2012 BO77, 2012 BM86
A77Chante-Perdrix Obs. in France, 1 in MPEC 2012-C24 -- C/2010 G2
970Chelmsford Obs. in England, 1 in MPEC 2012-C24 -- C/2011 G1
J01Cielo Profundo Obs. in Spain, 4 in MPEC 2012-C24 -- P/2012 B1, C/2012 A2, C/2009 P1, 49P
850Cordell-Lorenz Obs. in Tennessee, 5 in MPECs 2012-C22 & 2012-C24 -- P/2012 B1, C/2012 A1, C/2011 G1, 433, 49P
I17Cupillari Obs. in Pennsylvania, 3 in MPEC 2012-C22 -- 85839, 162186, 138911
958Dax Obs. in France, 11 in MPEC 2012-C24 -- C/2012 A2, C/2011 J2, C/2011 G1, C/2010 R1, C/2010 G2, C/2010 FB87, C/2009 P1, 246P, 244P, 49P, 29P
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-C22 -- 2012 BT23, 141056, 2340
C74El Teatrillo de Lyra Obs. in Spain, 1 in MPEC 2012-C24 -- C/2009 P1
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-C23 -- C/2012 B3
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-C24 -- P/2012 B1
F651UKAPP in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-C23 -- C/2012 B3
I88Fuensanta de Martos Obs., 1 in MPEC 2012-C24 -- C/2009 P1
372Geisei Obs. in Japan, 6 in MPEC 2012-C24 -- C/2012 A2, C/2012 A1, P/2011 W2, C/2011 L4, C/2005 L3, 27P
E94Gisborne Obs. in New Zealand, 3 in MPEC 2012-C24 -- C/2011 R1, C/2009 F4, 242P
J95Great Shefford Obs. in England, 2 in MPECs 2012-C22 & 2012-C23 -- 2012 CU, C/2012 B3
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2012-C24 -- C/2009 F4
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-C22 -- 2008 WZ13, 24475
D88Hiratsuka Obs. in Japan, 7 in MPEC 2012-C24 -- P/2011 W2, C/2011 G1, C/2010 S1, C/2010 G2, C/2010 FB87, 244P, 78P
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-C23 -- C/2012 B3
C32Ka-Dar Obs. TAU Station in Russia, 14 in MPECs 2012-C23 & 2012-C24 -- C/2012 B3, P/2012 B1, C/2012 A2, C/2011 UF305, C/2011 J2, C/2010 R1, C/2009 UG89, 243P, 171P, 164P, 163P, 123P, 103P, 49P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2012-C24 -- C/2009 P1
D95Kurihara Obs. in Japan, 12 in MPEC 2012-C24 -- P/2011 W2, C/2011 UF305, C/2011 L4, C/2011 G1, C/2010 S1, C/2010 R1, C/2010 G2, C/2010 FB87, C/2009 P1, C/2006 S3, P/2003 T12, 78P
704LINEAR in New Mexico, 6 in MPECs 2012-C22 & 2012-C24 -- P/2012 B1, 308127, 153951, 141056, 164P, 49P
J75La Sagra Obs. in Spain, 1 in MPEC 2012-C23 -- C/2012 B3
J38La Vara Obs. in Spain, 6 in MPEC 2012-C24 -- P/2012 B1, C/2010 S1, C/2010 G2, 244P, 164P, 78P
C01Lohrmann Obs. in Germany, 4 in MPEC 2012-C22 -- 2011 SL102, 275792, 162421, 138524
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2012-C24 -- P/2010 JC81
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-C22 & 2012-C23 -- C/2012 B3, 2002 BF25
B82Maidbronn Obs. in Germany, 2 in MPEC 2012-C24 -- C/2011 G1, C/2010 S1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-C22 -- 1999 AU23
213Montcabre Obs. in Spain, 4 in MPEC 2012-C24 -- P/2012 B1, C/2012 A2, C/2011 F1, C/2009 P1
945Monte Deva Obs. in Spain, 5 in MPEC 2012-C24 -- C/2012 A2, C/2011 F1, C/2009 P1, 78P, 49P
900Moriyama Obs. in Japan, 13 in MPEC 2012-C24 -- P/2012 B1, C/2012 A2, P/2011 W1, C/2011 J2, C/2011 G1, C/2011 F1, C/2010 G2, 244P, 164P, 117P, 78P, 49P, 29P
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2012-C23 -- C/2012 B3
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2012-C22 & 2012-C24 -- C/2010 FB87, 2009 HC82, 2009 AL15, 2008 DJ5, 2004 BH41, 65706, 123P, 69P
E07Murrumbateman Obs. in New South Wales, 3 in MPEC 2012-C24 -- C/2011 L2, C/2011 J2, 97P
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-C24 -- 29P
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-C24 -- P/2003 HT15
J47Nazaret Obs. in Spain, 6 in MPEC 2012-C24 -- P/2012 B1, P/2011 W2, C/2010 G2, C/2009 P1, 255P, 29P
A24New Millennium Obs. in Italy, 12 in MPEC 2012-C24 -- C/2012 A2, P/2011 W2, P/2011 W1, C/2011 G1, C/2010 S1, P/2010 JC81, 246P, 244P, 164P, 117P, 78P, 49P
C23Olmen Obs. in Belgium, 12 in MPEC 2012-C24 -- P/2012 B1, C/2011 G1, C/2011 F1, C/2010 S1, C/2010 G2, C/2009 P1, C/2008 FK75, 246P, 78P, 49P, 29P, 21P
261'Maik Meyer in Germany using the Palomar Digitized Sky Survey (Palomar DSS) in southern California, 3 in MPEC 2012-C24 -- X/1955 G2, X/1954 V2, X/1954 C2
F51Pan-STARRS 1 (PS1) in Hawaii, 29 in MPECs 2012-C22 & 2012-C24 -- 2012 BB124, C/2012 A1, P/2011 W1, P/2011 S1, P/2011 JB15, C/2011 A3, C/2010 R1, C/2009 Y1, C/2009 S3, C/2008 S3, C/2008 FK75, 2002 AW, 65706, 31346, 192642, 163000, 12923, 6050, 243P, 213P, 167P, 143P, 130P, 115P, 78P, 48P, 36P, 21P, 9P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-C24 -- C/2012 A2, P/2011 W2, C/2011 G1, C/2011 F1, 244P, 49P
H063program code 3 via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-C24 -- P/2003 T12
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 3 in MPECs 2012-C23 & 2012-C24 -- C/2012 B3, P/2003 T12, P/2003 HT15
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 13 in MPEC 2012-C24 -- P/2012 B1, P/2011 W2, C/2011 R1, P/2011 N1, C/2011 L4, C/2010 B1, C/2009 F4, 246P, 164P, 123P, 117P, 49P, 29P
939Rodeno Obs. in Spain, 2 in MPEC 2012-C24 -- C/2010 S1, C/2010 G2
C50STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2012-C24 -- P/2012 A3
204Schiaparelli Obs. in Italy, 5 in MPEC 2012-C24 -- P/2011 U2, P/2011 R3, C/2011 G1, 242P, 65P
D93Sendai Obs. in Japan, 1 in MPEC 2012-C24 -- C/2012 A2
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-C24 -- C/2010 G2
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2012-C22 -- 25143
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-C24 -- C/2011 J2
291Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2012-C22, 2012-C23 & 2012-C24 -- 2012 BZ76, 2012 BZ34, 2012 BO11, 2012 BN77, 2012 BN11, 2012 BM86, 2012 BL86, 2012 BK11, 2012 BE86, 2012 BD77, 2012 BD124, 2012 BC77, 2012 BA35, C/2012 B3, P/2012 B1, 2012 AW12, 2012 AD3
C36Starry Wanderer Obs., 1 in MPEC 2012-C24 -- C/2009 P1
I81Tarbatness Obs. in Scotland, 5 in MPEC 2012-C24 -- C/2011 F1, C/2010 S1, C/2010 G2, 246P, 49P
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2012-C24 -- 49P
0125Peter De Cat via Uccle Obs. in Belgium, 1 in MPEC 2012-C23 -- C/2012 B3
B51Vallauris Obs. in France, 1 in MPEC 2012-C24 -- C/2010 FB87
H47Vicksburg Obs. in Mississippi, 4 in MPEC 2012-C24 -- C/2009 P1, 164P, 49P, 29P
C90Vinyols Obs., 3 in MPEC 2012-C24 -- P/2011 W2, P/2011 W1, C/2009 P1
C42Xingming Obs. in China, 1 in MPEC 2012-C24 -- C/2009 P1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 February '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 CUJPL Sentry16162040-210049.2e-07-6.65-6.940JPL: "Analysis based on 24 observations spanning 1.7171 days (2012-Feb-02.40401 to 2012-Feb-04.12116)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
NEODyS16162040-204017.28e-08-7.33-7.330NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2012-02-02.405 to 2012-02-04.122."
2012 BM86JPL Sentry1616R E M O V E DJPL: Risk listing removed at 0951 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 4 February '12

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

2000Grabbed MPEC 2012-C24 - Observations and Orbits of Comets - see above
1706Grabbed MPEC 2012-C23 - Comet C/2012 B3 (La Sagra) - see above
1621Posted Traffic Report
1616Noted that JPL Sentry has removed 2012 BM86 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 CU risk assessment - see above
Noted that NEODyS has posted 2012 CU as an impact risk - see above
Grabbed MPEC 2012-C22 - Daily Orbit Update - see above