Contents  on 9 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 9 February '13

Five objects reported inside ten LD

There are five objects reported to be within a radius of ten lunar distances (LD) from Earth today. Radar target 2013 BS45 is inbound from 5.31 to 5.08 LD, radar target 2013 BV15 from 8.76 to 7.13 LD, and intruder 2012 DA14 (risk-listed radar target) from 9.50 to 8.12 LD, while 2013 BA74 is outbound from 6.20 to 7.40 LD and risk-listed intruder 2013 CY from 7.02 to 7.61 LD.

Next known to be approaching our neighborhood next, risk-listed 2007 EO88 arrives inside ten LD on March 15th.

This report was generated at 1739 UTC with follow-up in today's DOU MPEC for 2013 CY, 2013 BA74, 2013 BS45, 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 9 February '13

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2322 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 41 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 9 February '13

Minor Planet Electronic Circulars

As of last check at 2322 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-C42 - "11:25 UT" - 2008 DG17

<< DOU on 9 Feb. '13 >>  MPEC 2013-C41 - "06:03 UT" - Daily Orbit Update

MPEC 2013-C40 - "00:44 UT" - 2008 CA5

Observers  on 9 February '13

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2013-C41 -- 17182, 1620
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2013-C41 -- 2013 CY, 2013 BC74, 2012 XE112, 2010 GY6, 2009 UM3, 2008 HV4, 2008 CR1, 228368, 5332
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-C41 -- 2009 SC15, 2005 DD, 296318, 153267, 6569
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2013-C41 -- 2013 CX32, 2013 CR35
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-C41 -- 2012 DA14
I88Fuensanta de Martos Obs., 1 in MPEC 2013-C41 -- 99942
203GiaGa Obs. in Italy, 3 in MPEC 2013-C41 -- 2013 CX32, 2013 BV15, 2012 XF112
J95Great Shefford Obs. in England, 1 in MPEC 2013-C40 -- 2008 CA5
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2013-C41 -- 10115
711McDonald Obs. in Texas, 1 in MPEC 2013-C41 -- 2013 BV15
474Mt. John Obs. in New Zealand, 12 in MPEC 2013-C41 -- 2013 CX32, 2013 CQ35, 2013 BV15, 2013 BE19, 2013 BD70, 2013 BC74, 2013 BA74, 2013 AT76, 2013 AQ72, 2012 XM145, 2012 DA14, 2010 GY6
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2013-C40 & 2013-C41 -- 2013 BC18, 2013 AY52, 2008 CA5, 329669, 207970, 162011, 3288
0891program code 1 via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-C41 -- 99942
C47Nonndorf Obs. in Austria, 1 in MPEC 2013-C41 -- 2013 BV15
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2013-C41 -- 2013 AA2, 137925
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-C41 & 2013-C42 -- 2013 CP35, 2013 AW60, 2011 SD173, 2011 BN24, 2008 EQ7, 2008 DG17, 331509, 25916, 238063, 8507, 5189
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-C41 -- 2013 CN35
645Sloan Digital Sky Survey (SDSS) in New Mexico, 2 in MPEC 2013-C41 -- 2009 XZ1, 2009 SC15
J84South Obs. in England, 1 in MPEC 2013-C41 -- 2013 BV15
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2013-C41 -- 2013 BS45, 2012 XT134, 2012 GV11, 2011 XZ1
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-C40 -- 2008 CA5
147Suno Obs. in Italy, 1 in MPEC 2013-C41 -- 99942
I76Tesla Obs. in Spain, 1 in MPEC 2013-C41 -- 2010 QD2
C44Volta Obs. in Italy, 1 in MPEC 2013-C40 -- 2008 CA5
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-C42 -- 2008 DG17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 February '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2322 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
2013 CYJPL Sentry17372069-209164.3e-06-7.31-7.800JPL: "Analysis based on 62 observations spanning 6.9795 days (2013-Feb-01.34874 to 2013-Feb-08.32824)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS17372069-209694.95e-06-7.26-7.910NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2013-02-01.350 to 2013-02-08.329."
2012 DA14JPL Sentry17372080-209223.7e-08-7.36-7.370JPL: "Analysis based on 218 observations spanning 351.42 days (2012-Feb-23.03431 to 2013-Feb-08.455728)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
NEODyS17372080-209883.88e-05-4.35-4.380NEODyS: "Based on 221 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-02-08.457."

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 9 February '13

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

1739Generated Traffic Report
1737Noted that JPL Sentry has reposted 2012 DA14 as an impact risk - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CY risk assessment - see above
Noted that NEODyS has updated its 2013 CY risk assessment - see above
Grabbed MPEC 2013-C41 - Daily Orbit Update - see above
Grabbed MPEC 2013-C42 - 2008 DG17 - see above
0231Grabbed MPEC 2013-C40 - 2008 CA5 - see above