Contents  on 12 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 12 February '12

No objects reported inside ten LD

There are no objects reported traveling inside ten lunar distances (LD) of our planet today. Coming toward Earth, radar target 2011 CP4 arrives inside ten LD on February 22nd and 2008 EJ85 comes inside ten LD on March 4th.

This report was posted at 1623 UTC with observation in today's DOU MPEC of departed 2012 CL17.

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 12 February '12

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of thirteen 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 12 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.

MPEC 2012-C45 - "23:14 UT" - 2012 CD18

MPEC 2012-C44 - "21:14 UT" - Comet C/2012 C2 (Bruenjes)

<< DOU on 12 Feb. '12 >>  MPEC 2012-C43 - "06:02 UT" - Daily Orbit Update

Observers  on 12 February '12

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-C43 & 2012-C45 -- 2012 CD18, 302831, 138524
J51Atlante Obs. in the Canary Islands, 4 in MPEC 2012-C43 -- 2011 WV134, 32906, 192642, 153951
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-C44 -- C/2012 C2
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2012-C43 & 2012-C45 -- 2012 CD18, 2004 QB17, 2002 AW, 90403, 313548, 311044, 232691, 192642, 190208, 163000, 162038, 153951, 142348, 141018, 6050, 2061, 1943
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-C43 -- 2012 BZ76, 2012 BO77, 2012 BB77, 2012 AC3, 68359, 155334
I17Cupillari Obs. in Pennsylvania, 1 in MPEC 2012-C43 -- 2012 BC124
448Desert Moon Obs. in New Mexico, 5 in MPEC 2012-C43 -- 2012 CT, 2012 BB77, 2012 BB124, 311554, 137064
639Dresden Obs. in Germany, 1 in MPEC 2012-C43 -- 2006 AL8
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2012-C43 -- 2012 BT23
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-C43 -- 2012 CL17
J95Great Shefford Obs. in England, 2 in MPECs 2012-C43 & 2012-C45 -- 2012 CD18, 2012 BJ86
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-C44 -- C/2012 C2
704LINEAR in New Mexico, 5 in MPEC 2012-C43 -- 2008 QY, 32906, 263976, 184990, 137805
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2012-C43 -- 85839
118Modra Obs. in Slovakia, 1 in MPEC 2012-C44 -- C/2012 C2
H27Moonglow Obs. in Missouri, 1 in MPEC 2012-C44 -- C/2012 C2
900Moriyama Obs. in Japan, 1 in MPEC 2012-C44 -- C/2012 C2
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2012-C43 -- 2003 BK47, 2002 AW, 313552, 7358
I89Nerpio Obs. in Italy, 1 in MPEC 2012-C44 -- C/2012 C2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-C45 -- 2012 CD18
H36Sandlot Obs. in Kansas, 2 in MPEC 2012-C43 -- 2012 BJ86, 2006 WU
204Schiaparelli Obs. in Italy, 4 in MPEC 2012-C43 -- 2012 BV13, 2012 BG14, 2012 BA14, 2011 QD48
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-C45 -- 2012 CD18
6734Mike Hicks via Table Mtn. Obs. in southern California, 1 in MPEC 2012-C44 -- C/2012 C2
B18Terskol Obs. in Russia, 1 in MPEC 2012-C45 -- 2012 CD18
B42Vitebsk Obs. in Belarus, 1 in MPEC 2012-C44 -- C/2012 C2
C44Volta Obs. in Italy, 1 in MPEC 2012-C45 -- 2012 CD18
367Yatsuka Obs. in Japan, 1 in MPEC 2012-C44 -- C/2012 C2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 CL17JPL Sentry16202095-2112221.7e-06-6.10-6.660JPL: "Analysis based on 20 observations spanning 1.0704 days (2012-Feb-10.31603 to 2012-Feb-11.386411)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2012 BJ86JPL Sentry16202102-211244.7e-07-4.85-5.110JPL: "Analysis based on 39 observations spanning 14.022 days (2012-Jan-29.10142 to 2012-Feb-12.123359)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS16202090-209016.75e-09-6.60-6.60NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-02-12.124."

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 12 February '12

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

2359Grabbed MPEC 2012-C45 - 2012 CD18 - see above
2152Grabbed MPEC 2012-C44 - Comet C/2012 C2 (Bruenjes) - see above
1623Posted Traffic Report
1620Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above
Noted that NEODyS has updated its 2012 BJ86 risk assessment - see above
Noted that JPL Sentry has updated its 2012 CL17 risk assessment - see above
Grabbed MPEC 2012-C43 - Daily Orbit Update - see above