Contents  on 9 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 9 January '13

One object reported inside ten LD

One asteroid is reported to be inside ten lunar distances (LD) of Earth today. 2013 AB4 is inbound from 8.72 to 7.53 LD. Coming our way next, intruder 2012 DA14 (risk-listed radar target) arrives inside ten LD on February 8th.

This report was generated at 1559 UTC with follow-up in today's DOU MPEC for departed objects 2013 AD4 and 2012 XJ134.


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 January '13

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2036 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 47 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 January '13

Minor Planet Electronic Circulars

As of last check at 2036 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-A50 - "20:22 UT" - 2013 AD32


MPEC 2013-A49 - "20:20 UT" - 2013 AC32


MPEC 2013-A48 - "20:17 UT" - 2013 AB32


MPEC 2013-A47 - "20:10 UT" - 2013 AA32


<< DOU on 9 Jan. '13 >>  MPEC 2013-A46 - "06:03 UT" - Daily Orbit Update

Observers  on 9 January '13

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

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2013-A46 -- 2013 AN20, 2012 XF112
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2013-A46 & 2013-A47 -- 2013 AN20, 2013 AH11, 2013 AF4, 2013 AC, 2013 AA32, 2012 XF112, 229672, 203471, 3908
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-A46 -- 2013 AU27
726Brainerd Obs. in Minnesota, 3 in MPEC 2013-A46 -- 2002 AY1, 203471, 138937
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2013-A46 -- 2012 YQ1, 2008 XE2, 2007 YX1, 330825, 136795, 3199
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPEC 2013-A46 -- 2013 AD4, 2012 XD133, 2012 WL4, 2012 TS, 2012 TH79, 2012 RG3, 2012 QE50, 2012 PW, 2012 LL9, 2010 WE9, 2008 HV4, 2003 GW, 212359, 141526
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPEC 2013-A46 -- 2013 AS27, 2013 AO20, 2013 AN20, 2013 AH11
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-A46 -- 99942
E103program code 3 via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-A46 -- 99942
157Frasso Sabino Obs. in Italy, 1 in MPEC 2013-A46 -- 2013 AS27
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 8 in MPEC 2013-A46 -- 2012 YY6, 2012 YO3, 2012 YO1, 2012 XY6, 2012 XO111, 2012 XJ134, 2012 VA5, 2012 PP28
J75La Sagra Obs. in Spain, 1 in MPEC 2013-A47 -- 2013 AA32
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-A47 -- 2013 AA32
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-A46 -- 2013 AS27
900Moriyama Obs. in Japan, 1 in MPEC 2013-A46 -- 2013 AS27
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-A46, 2013-A47, 2013-A49 & 2013-A50 -- 2013 AD32, 2013 AC32, 2013 AA32, 137805
A13Naef Obs. in Switzerland, 6 in MPEC 2013-A46 -- 2012 YQ3, 2012 XF112, 2010 XL69, 2001 YM2, 262623, 138937
A24New Millennium Obs. in Italy, 6 in MPEC 2013-A46 -- 52762, 262623, 154347, 12711, 11284, 4179
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2013-A46 & 2013-A48 -- 2013 AJ11, 2013 AB32, 2012 VF80, 88959, 343098, 340048, 219071, 212546, 163081, 162011, 15745, 154715, 152679
B49Paus Obs. in Spain, 1 in MPEC 2013-A47 -- 2013 AA32
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-A47 -- 2013 AA32
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-A47 -- 2013 AA32
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-A47 & 2013-A48 -- 2013 AB32, 2013 AA32
204Schiaparelli Obs. in Italy, 3 in MPECs 2013-A47, 2013-A49 & 2013-A50 -- 2013 AD32, 2013 AC32, 2013 AA32
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-A46 -- 2005 DD
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2013-A46, 2013-A48, 2013-A49 & 2013-A50 -- 2013 AD32, 2013 AC32, 2013 AB32, 2012 YY6, 2012 YQ1, 2012 YK7, 2012 YD7, 2012 XT93, 2012 XJ134, 2012 XF133, 2012 XE133, 2012 XD112, 2005 EK94, 2002 BG25, 2001 EB18
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 January '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2036 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2012 XE133JPL Sentry15582083-209131.9e-08-7.18-7.480JPL: "Analysis based on 102 observations spanning 27.668 days (2012-Dec-12.43361 to 2013-Jan-09.10121)." Diameter approximately 0.072 km. from mean, weighted H=23.4.
99942 Apophis (2004 MN4)JPL Sentry18222036-2105197.5e-06-3.20-3.330JPL: "Analysis based on 2 radar delay, 5 Doppler, and 444 optical observations spanning 3211.5 days (2004-Mar-15.10789 to 2012-Dec-29.58034)." Diameter approximately 0.270 km. from mean, weighted H=19.7.

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 9 January '13

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

2036Grabbed MPEC 2013-A47 - 2013 AA32 - see above
Grabbed MPEC 2013-A48 - 2013 AB32 - see above
Grabbed MPEC 2013-A49 - 2013 AC32 - see above
Grabbed MPEC 2013-A50 - 2013 AD32 - see above
1822Noted that JPL Sentry has updated its 99942 Apophis (2004 MN4) risk assessment - see above
1559Generated Traffic Report
1558Noted that JPL Sentry has updated its 2012 XE133 risk assessment - see above
Grabbed MPEC 2013-A46 - Daily Orbit Update - see above