Contents  on 5 February '12


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 5 February '12

No objects reported inside ten LD

No asteroids are reported flying within ten lunar distances (LD) of Earth today. Radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was posted at 1617 UTC with follow-up in today's DOU MPEC for departed 2012 CU.

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 5 February '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 30 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 5 February '12

Minor Planet Electronic Circulars

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

MPEC 2012-C32 - "19:52 UT" - 2012 CC17

MPEC 2012-C31 - "16:40 UT" - 2012 CP2

MPEC 2012-C30 - "15:48 UT" - 2012 CN2

MPEC 2012-C29 - "15:46 UT" - 2012 CM2

MPEC 2012-C28 - "15:44 UT" - 2012 CL2

MPEC 2012-C27 - "15:42 UT" - 2012 CK2

MPEC 2012-C26 - "15:39 UT" - 2012 AT22

<< DOU on 5 Feb. '12 >>  MPEC 2012-C25 - "06:05 UT" - Daily Orbit Update

Observers  on 5 February '12

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
J97Alginet Obs. in Spain, 1 in MPEC 2012-C25 -- 1866
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-C25 -- 32906
300Bisei Spaceguard Center in Japan, 2 in MPECs 2012-C26 & 2012-C32 -- 2012 CC17, 2012 AT22
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-C26 -- 2012 AT22
8073Vivian Hoette via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-C28 -- 2012 CL2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2012-C25, 2012-C26 & 2012-C28 -- 2012 CU, 2012 CT, 2012 CL2, 2012 AT22, 2008 EP6, 2006 CJ
I19El Gato Gris Obs. in Argentina, 2 in MPECs 2012-C26 & 2012-C28 -- 2012 CL2, 2012 AT22
J95Great Shefford Obs. in England, 5 in MPECs 2012-C26, 2012-C28, 2012-C29, 2012-C31 & 2012-C32 -- 2012 CP2, 2012 CM2, 2012 CL2, 2012 CC17, 2012 AT22
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-C26 -- 2012 AT22
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPECs 2012-C25, 2012-C26 & 2012-C32 -- 2012 CC17, 2012 AT22, 163000
704LINEAR in New Mexico, 2 in MPEC 2012-C25 -- 308127, 153951
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-C25 -- 32906
900Moriyama Obs. in Japan, 1 in MPEC 2012-C25 -- 2012 CU
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-C26, 2012-C27, 2012-C28, 2012-C29, 2012-C30, 2012-C31 & 2012-C32 -- 2012 CP2, 2012 CN2, 2012 CM2, 2012 CL2, 2012 CK2, 2012 CC17, 2012 AT22
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-C25 -- 161989
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2012-C25 -- 2012 BB124, 2002 AW, 65706, 159857, 142348, 141018, 12923, 3838
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-C26 -- 2012 AT22
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2012-C27, 2012-C29 & 2012-C30 -- 2012 CN2, 2012 CM2, 2012 CK2
244geocentric occultation observation, 2 in MPEC 2012-C25 -- 1036, 433
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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.





Notes for Today's Latest Risk Assessments
2012 CUJPL Sentry16032092-210131.3e-06-6.62-6.820JPL: "Analysis based on 37 observations spanning 1.9837 days (2012-Feb-02.40401 to 2012-Feb-04.38775)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
NEODyS16032040-204015.38e-08-7.51-7.510NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2012-02-02.405 to 2012-02-04.389."

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 5 February '12

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

2010Grabbed MPEC 2012-C32 - 2012 CC17 - see above
1717Grabbed MPEC 2012-C31 - 2012 CP2 - see above
1617Posted Traffic Report
1605Grabbed MPEC 2012-C25 - Daily Orbit Update - see above
1603Noted that JPL Sentry has updated its 2012 CU risk assessment - see above
Noted that NEODyS has updated its 2012 CU risk assessment - see above
Grabbed MPEC 2012-C26 - 2012 AT22 - see above
Grabbed MPEC 2012-C27 - 2012 CK2 - see above
Grabbed MPEC 2012-C28 - 2012 CL2 - see above
Grabbed MPEC 2012-C29 - 2012 CM2 - see above
Grabbed MPEC 2012-C30 - 2012 CN2 - see above