Contents  on 10 February '13

Asteroid/Comet Connection (A/CC) 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 10 February '13

Five objects reported inside ten LD

Five objects are reported to be within ten lunar distances (LD) of our planet today. Radar target 2013 BS45 is inbound from 5.08 to 4.94 LD, radar target 2013 BV15 from 7.13 to 5.63 LD, and intruder 2012 DA14 (risk-listed radar target) from 8.12 to 6.74 LD, while 2013 BA74 is outbound from 7.39 to 8.72 LD and risk-listed intruder 2013 CY from 7.61 to 8.21 LD.

Up next, risk-listed 2007 EO88 arrives inside ten LD on March 15th.

This report was generated at 1718 UTC with follow-up in today's DOU MPEC for 2013 BV15 and 2012 DA14.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 10 February '13

The MPC's NEO Confirmation Page has 39 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 39 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 53 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 10 February '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-C44 - "21:49 UT" - 2013 CT36

<< DOU on 10 Feb. '13 >>  MPEC 2013-C43 - "06:03 UT" - Daily Orbit Update

Observers  on 10 February '13

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
C77Bernezzo Obs. in Italy, 2 in MPECs 2013-C43 & 2013-C44 -- 2013 CT36, 2008 DG17
B75Betelgeuse Station in Italy, 1 in MPEC 2013-C44 -- 2013 CT36
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2013-C43 & 2013-C44 -- 2013 CT36, 348776, 153249
958Dax Obs. in France, 1 in MPEC 2013-C44 -- 2013 CT36
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-C44 -- 2013 CT36
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-C43 -- 2012 DA14
203GiaGa Obs. in Italy, 1 in MPEC 2013-C44 -- 2013 CT36
D95Kurihara Obs. in Japan, 1 in MPEC 2013-C43 -- 4179
A14Les Engarouines Obs. in France, 1 in MPEC 2013-C43 -- 3554
844Los Molinos Obs. in Uruguay, 3 in MPEC 2013-C43 -- 88263, 242450, 230111
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-C43 -- 2013 BN73, 2013 AV60, 2012 XS93
711McDonald Obs. in Texas, 1 in MPEC 2013-C44 -- 2013 CT36
900Moriyama Obs. in Japan, 2 in MPECs 2013-C43 & 2013-C44 -- 2013 CT36, 2008 DG17
474Mt. John Obs. in New Zealand, 1 in MPEC 2013-C43 -- 2012 DA14
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-C44 -- 2013 CT36
C47Nonndorf Obs. in Austria, 2 in MPECs 2013-C43 & 2013-C44 -- 2013 CT36, 2013 BV15
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPEC 2013-C43 -- 2012 QP17, 2012 CD29, 2005 YQ96, 338049, 329669, 261938, 249886, 177016, 154988, 152667, 3288
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2013-C43 -- 198752
V05Rusty Mtn. Obs., 1 in MPEC 2013-C44 -- 2013 CT36
C48Sayn Solar Obs. in Russia, 1 in MPEC 2013-C44 -- 2013 CT36
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-C44 -- 2013 CT36
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-C44 -- 2013 CT36
954Teide Obs. in the Canary Islands, 1 in MPEC 2013-C44 -- 2013 CT36
I76Tesla Obs. in Spain, 1 in MPEC 2013-C43 -- 2013 CR35
C44Volta Obs. in Italy, 1 in MPEC 2013-C44 -- 2013 CT36
H06iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2013-C43 & 2013-C44 -- 2013 CT36, 2002 BP26
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 February '13

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 DA14JPL Sentry17142080-211236.4e-06-5.08-5.080JPL: "Analysis based on 249 observations spanning 352.50 days (2012-Feb-23.03431 to 2013-Feb-09.53123)." Diameter approximately 0.050 km. from mean, weighted H=24.1.
NEODyS17142080-209888.33e-05-3.97-4.00NEODyS: "Based on 252 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-02-09.532."

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 10 February '13

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

2201Grabbed MPEC 2013-C44 - 2013 CT36 - see above
1718Generated Traffic Report
1714Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Grabbed MPEC 2013-C43 - Daily Orbit Update - see above