Contents  on 2 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 2 February '13

Two objects reported inside ten LD

There are two objects reported within a radius of ten lunar distances (LD) from our planet today. 2013 BA74 is inbound from 8.30 to 7.00 LD and radar target 2013 BS45 from 8.47 to 7.91 LD.

Headed our way next, 2013 BV15 and intruder 2012 DA14 (risk-listed radar target) both arrive inside ten LD on February 8th.

This report was generated at 1657 UTC with follow-up in today's DOU MPEC for 2013 BS45 and 2013 BV15 as well as first follow-up for departed 2013 BB70 (extending its observing arc from 1.08 to 10.24 days) and observation of distant 2012 XJ134 and 68216 2001 CV26.

2347 UTC update: The Minor Planet Center is reporting that newly discovered 2013 CY (MPEC) passed through the Earth-Moon system and is now outbound. Relevant pages here will show details after JPL Horizons posts an orbit solution.

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 2 February '13

The MPC's NEO Confirmation Page has 17 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 29 listings on the NEOCP today.

New MPECs  on 2 February '13

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 2013-C11 - "23:03 UT" - 2013 CZ

MPEC 2013-C10 - "22:58 UT" - 2013 CY

MPEC 2013-C09 - "22:54 UT" - 2013 BM76

<< DOU on 2 Feb. '13 >>  MPEC 2013-C08 - "06:02 UT" - Daily Orbit Update

MPEC 2013-C07 - "04:13 UT" - Comet P/2009 QG31 (La Sagra)

Observers  on 2 February '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 1 in MPEC 2013-C07 -- P/2009 QG31
A05Belesta Obs. in France, 1 in MPEC 2013-C08 -- 99942
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-C09, 2013-C10 & 2013-C11 -- 2013 CZ, 2013 CY, 2013 BM76
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2013-C08, 2013-C09, 2013-C10 & 2013-C11 -- 2013 CZ, 2013 CY, 2013 BM76, 338172, 249886, 136793
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2013-C08 & 2013-C10 -- 2013 CY, 2013 BU2, 2013 BD70, 2012 XC55, 2012 QE50, 35107
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-C09 -- 2013 BM76
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-C09 -- 2013 BM76
J95Great Shefford Obs. in England, 2 in MPECs 2013-C09 & 2013-C10 -- 2013 CY, 2013 BM76
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2013-C10 -- 2013 CY
5682David Tholen's team on Mauna Kea in Hawaii, 6 in MPECs 2013-C08 & 2013-C10 -- 2013 CY, 2013 BP15, 2013 BC74, 2013 AN60, 2012 XJ134, 2006 HV57
711McDonald Obs. in Texas, 1 in MPEC 2013-C08 -- 2013 BS45
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-C08, 2013-C09 & 2013-C11 -- 2013 CZ, 2013 BM76, 2013 AW52, 2013 AA2, 351508
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-C07 -- P/2009 QG31
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2013-C08 -- 68216, 136993
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2013-C08 -- 2013 BV15, 2013 BU15, 2012 XF112, 2012 QP17, 99942, 214869
H36Sandlot Obs. in Kansas, 4 in MPECs 2013-C08 & 2013-C09 -- 2013 BS45, 2013 BM76, 2013 AS27, 2013 AE69
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2013-C08 -- 2012 CD29, 2008 CR118, 1998 QR15, 229007, 164216
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2013-C08 & 2013-C11 -- 2013 CZ, 2013 BZ45, 2013 BU15, 2013 BT18, 2013 BS45, 2013 BP73, 2013 BO45, 2013 BO27, 2013 BK18, 2013 BJ18, 2013 BF27, 2013 BF18, 2013 BE27, 2013 BB70, 2013 AE69, 2012 YO1
954Teide Obs. in the Canary Islands, 2 in MPECs 2013-C10 & 2013-C11 -- 2013 CZ, 2013 CY
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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
2013 BP73JPL Sentry16532062-2110501.6e-05-2.43-2.840JPL: "Analysis based on 17 observations spanning 10.101 days (2013-Jan-22.24343 to 2013-Feb-01.34398)." Diameter approximately 0.303 km. from mean, weighted H=20.2.

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 2 February '13

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

2326Grabbed MPEC 2013-C09 - 2013 BM76 - see above
Grabbed MPEC 2013-C10 - 2013 CY - see above
Grabbed MPEC 2013-C11 - 2013 CZ - see above
1657Generated Traffic Report
1653Noted that JPL Sentry has updated its 2013 BP73 risk assessment - see above
Grabbed MPEC 2013-C08 - Daily Orbit Update - see above
0657Grabbed MPEC 2013-C07 - Comet P/2009 QG31 (La Sagra) - see above