Contents  on 16 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 16 February '12

No objects reported inside ten LD

No asteroids are reported passing inside ten lunar distances (LD) of Earth today. Coming in next is radar target 2011 CP4, which arrives inside ten LD on February 22nd, followed by 2008 EJ85 on March 4th.

This report was posted at 1548 UTC with follow-up in today's DOU MPEC for 2011 CP4.

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 16 February '12

The MPC's NEO Confirmation Page has 30 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 43 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 16 February '12

Minor Planet Electronic Circulars

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

MPEC 2012-D05 - "21:59 UT" - 2012 CP36

MPEC 2012-D04 - "21:57 UT" - 2012 CO36

MPEC 2012-D03 - "21:36 UT" - Comet P/2012 C3 (Panstarrs)

MPEC 2012-D02 - "20:23 UT" - 2008 PF1

<< DOU on 16 Feb. '12 >>  MPEC 2012-D01 - "06:03 UT" - Daily Orbit Update

Observers  on 16 February '12

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-D02 -- 2008 PF1
G51Byrne Obs. in southern California, 1 in MPEC 2012-D05 -- 2012 CP36
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2012-D01 -- 2012 BO77, 2011 YU74
821Cordoba Obs. Bosque Alegre Station in Argentina, 2 in MPEC 2012-D01 -- 2010 LM68, 308899
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2012-D01 & 2012-D05 -- 2012 CP36, 85990
E10Faulkes Telescope South in New South Wales, 2 in MPECs 2012-D02 & 2012-D03 -- P/2012 C3, 2008 PF1
704LINEAR in New Mexico, 6 in MPEC 2012-D01 -- 2002 AW, 21277, 21088, 192642, 138911, 4055
J75La Sagra Obs. in Spain, 1 in MPEC 2012-D02 -- 2008 PF1
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-D01 & 2012-D04 -- 2012 CO36, 2012 BH86
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-D03 -- P/2012 C3
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-D01 -- 21088
A24New Millennium Obs. in Italy, 21 in MPEC 2012-D01 -- 2012 AA11, 2011 XO3, 2011 WV134, 2006 AL8, 42286, 36284, 311554, 294739, 29075, 24475, 209924, 163696, 137805, 8567, 7358, 2368, 1943, 1866, 1627, 1620, 1036
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2012-D01, 2012-D03, 2012-D04 & 2012-D05 -- 2012 CP36, 2012 CO36, 2012 CC17, P/2012 C3, 2012 BN77, 65706, 311554, 232691, 210012, 141765, 141018, 4055
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-D02 -- 2008 PF1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-D01 -- 2011 CP4
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2012-D01 -- 2012 CK2, 2012 BN11, 2012 BK11, 2012 BB2, 2011 YB29, 2010 LN14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 CC29NEODyS15412048-207942.27e-09-6.94-7.040NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2012-02-13.454 to 2012-02-15.455."

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 16 February '12

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

2300Grabbed MPEC 2012-D03 - Comet P/2012 C3 (Panstarrs) - see above
Grabbed MPEC 2012-D04 - 2012 CO36 - see above
Grabbed MPEC 2012-D05 - 2012 CP36 - see above
2040Grabbed MPEC 2012-D02 - 2008 PF1 - see above
1548Posted Traffic Report
1540Noted that NEODyS has posted 2012 CC29 as an impact risk - see above
Grabbed MPEC 2012-D01 - Daily Orbit Update - see above