Contents  on 13 January '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 13 January '13

Three objects reported inside ten LD

There are three asteroids reported passing within ten lunar distances (LD) of Earth today. 2013 AB4 is outbound from 6.80 to 7.65 LD and 2013 AF53 from 8.62 to 9.77 LD, and newly announced 2013 AG69 departs from inside ten LD, traveling from 9.70 to 13.54 LD.

Next known to be coming into the neighborhood is intruder 2012 DA14, a risk-listed radar target that arrives inside ten LD on February 8th.

This report was updated at 2321 UTC with new discovery 2013 AG69 (MPEC). Today's first report was generated at 1810 UTC with the discovery of just departed risk-listed 2013 AB65 (MPEC).

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 13 January '13

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 28 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 13 January '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-A84 - "20:44 UT" - 2013 AG69

MPEC 2013-A83 - "20:41 UT" - 2013 AF69

MPEC 2013-A82 - "20:38 UT" - 2013 AE69

MPEC 2013-A81 - "15:57 UT" - 2013 AB65

<< DOU on 13 Jan. '13 >>  MPEC 2013-A80 - "06:04 UT" - Daily Orbit Update

Observers  on 13 January '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2013-A80 -- 2013 AU27, 2013 AN20, 2012 WB25, 192563, 5646
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2013-A80 -- 2013 AS27
300Bisei Spaceguard Center in Japan, 4 in MPECs 2013-A80, 2013-A82 & 2013-A83 -- 2013 AU27, 2013 AR60, 2013 AF69, 2013 AE69
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2013-A80, 2013-A81, 2013-A82, 2013-A83 & 2013-A84 -- 2013 AG69, 2013 AF69, 2013 AE69, 2013 AB65, 2012 XD112, 2010 QD2, 2009 BD2, 96189, 345853, 285263, 27346, 212359, 10165, 5131
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2013-A80 -- 2013 AO27, 2013 AO20, 2013 AL11, 2013 AB53, 2011 CS4, 2008 WH60, 2007 MT20, 2007 KN4, 2000 EA14, 22771, 153460
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2013-A81, 2013-A82, 2013-A83 & 2013-A84 -- 2013 AG69, 2013 AF69, 2013 AE69, 2013 AB65
006Fabra Obs. in Spain, 2 in MPEC 2013-A80 -- 2012 QF49, 6455
D95Kurihara Obs. in Japan, 1 in MPEC 2013-A80 -- 4179
844Los Molinos Obs. in Uruguay, 6 in MPEC 2013-A80 -- 2012 XE112, 99942, 343098, 159635, 12711, 1036
232Masquefa Obs. in Spain, 1 in MPEC 2013-A80 -- 99942
213Montcabre Obs. in Spain, 1 in MPEC 2013-A80 -- 99942
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2013-A80, 2013-A81, 2013-A83 & 2013-A84 -- 2013 AO60, 2013 AG69, 2013 AF69, 2013 AB65, 2012 XF112, 85490, 25143, 177614, 164216
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-A82 -- 2013 AE69
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-A83 -- 2013 AF69
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-A82 -- 2013 AE69
510Siegen Obs. in Germany, 1 in MPEC 2013-A80 -- 99942
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-A80 -- 2012 YY6
926Tenagra II Obs. in Arizona, 3 in MPEC 2013-A80 -- 96189, 159533, 12711
G33Wickede Obs. in Germany, 1 in MPEC 2013-A80 -- 4179
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 January '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 AB65JPL Sentry18112087-2111101.2e-06-7.12-7.470JPL: "Analysis based on 19 observations spanning 1.0157 days (2013-Jan-12.28046 to 2013-Jan-13.29619)." Diameter approximately 0.010 km. from mean, weighted H=27.7.

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 13 January '13

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

2321Updated Traffic Report
2142Grabbed MPEC 2013-A82 - 2013 AE69 - see above
Grabbed MPEC 2013-A83 - 2013 AF69 - see above
Grabbed MPEC 2013-A84 - 2013 AG69 - see above
1811Noted that JPL Sentry has posted 2013 AB65 as an impact risk - see above
1648Grabbed MPEC 2013-A80 - Daily Orbit Update - see above
Grabbed MPEC 2013-A81 - 2013 AB65 - see above