Contents  on 10 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 10 January '13

Three objects reported inside ten LD

Three objects are reported to be passing within ten lunar distances (LD) of Earth today. Newly announced 2013 AC53 is outbound from 5.98 to 7.30 LD, 2013 AB4 is inbound from 7.53 to 6.73 LD, and newly discovered 2013 AF53 comes its closest to Earth this time around, reaching 7.48 LD at 2055 UT. Next known to be approaching ten LD is intruder 2012 DA14, a risk-listed radar target that arrives inside on February 8th.

This report was updated at 2251 UTC with new discoveries 2013 AF53 (MPEC) and departed 2013 AH53 (MPEC), and before that at 2020 UTC with new discovery 2013 AC53 (MPEC). Today's first report was generated at 1608 UTC with the recovery of 2012 DA14 in today's DOU MPEC along with follow-up for departed objects 2013 AD4 and risk-listed 2012 YR1.

Note: As regards future close passes, Sky & Telescope reported yesterday that new radar observations of 99942 Apophis (2004 MN4) (links) "have given astronomers the confidence to issue an 'all clear' for the foreseeable future" including 2036. The public JPL and NEODyS risk assessments, which were updated yesterday and today without new radar data, each still include a 2036 impactor.


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 January '13

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 58 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 January '13

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been sixteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-A66 - "21:02 UT" - Comet P/2012 WA34 (Lemmon-Panstarrs)


MPEC 2013-A65 - "19:46 UT" - 2013 AH53


MPEC 2013-A64 - "19:44 UT" - 2013 AG53


MPEC 2013-A63 - "19:41 UT" - 2013 AF53


MPEC 2013-A62 - "17:11 UT" - 2013 AW52


MPEC 2013-A61 - "17:09 UT" - 2013 AE53


MPEC 2013-A60 - "17:06 UT" - 2013 AD53


MPEC 2013-A59 - "17:04 UT" - 2013 AC53


MPEC 2013-A58 - "17:01 UT" - 2013 AB53


MPEC 2013-A57 - "16:58 UT" - 2013 AA53


MPEC 2013-A56 - "16:55 UT" - 2013 AZ52


MPEC 2013-A55 - "16:52 UT" - 2013 AY52


MPEC 2013-A54 - "16:49 UT" - 2013 AX52


MPEC 2013-A53 - "12:33 UT" - 2003 BN4


MPEC 2013-A52 - "12:19 UT" - 2012 YF8


<< DOU on 10 Jan. '13 >>  MPEC 2013-A51 - "06:03 UT" - Daily Orbit Update

Observers  on 10 January '13

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2013-A59 -- 2013 AC53
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-A58 -- 2013 AB53
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2013-A51, 2013-A54, 2013-A55, 2013-A57 & 2013-A62 -- 2013 AY52, 2013 AX52, 2013 AW52, 2013 AO20, 2013 AL11, 2013 AJ11, 2013 AA53, 2012 YQ3, 2012 YP6, 2012 XY6, 2012 XS93, 2012 XS134, 2012 XJ55, 2012 XD55, 2010 BB, 262623, 154347, 138937, 5646, 2062
300Bisei Spaceguard Center in Japan, 5 in MPECs 2013-A54, 2013-A55, 2013-A58, 2013-A59 & 2013-A62 -- 2013 AY52, 2013 AX52, 2013 AW52, 2013 AC53, 2013 AB53
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2013-A51, 2013-A52, 2013-A53, 2013-A55, 2013-A59, 2013-A62, 2013-A63, 2013-A64 & 2013-A65 -- 2013 AY52, 2013 AW52, 2013 AH53, 2013 AG53, 2013 AF53, 2013 AC53, 2012 YQ3, 2012 YF8, 2012 XD112, 2010 XL69, 2004 XN14, 2003 BN4, 25916, 229672, 153306, 137099, 11054, 3554, 1862
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2013-A51 & 2013-A58 -- 2013 AO20, 2013 AH11, 2013 AD4, 2013 AB53, 2012 XK16, 2012 VV93, 2010 DA, 2001 YF1
448Desert Moon Obs. in New Mexico, 3 in MPEC 2013-A51 -- 2012 YQ3, 323179, 212359
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2013-A51 & 2013-A54 -- 2013 AX52, 2013 AU27
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-A51 -- 99942
157Frasso Sabino Obs. in Italy, 1 in MPEC 2013-A54 -- 2013 AX52
C73Galati Obs. in Romania, 1 in MPEC 2013-A51 -- 99942
J95Great Shefford Obs. in England, 3 in MPECs 2013-A51, 2013-A60 & 2013-A61 -- 2013 AE53, 2013 AD53, 2013 AB32
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2013-A51 -- 2012 YR1, 2012 XQ55, 2012 XD112, 2012 VL6, 2007 AG12
704LINEAR in New Mexico, 20 in MPECs 2013-A51, 2013-A54, 2013-A55 & 2013-A58 -- 2013 AY52, 2013 AX52, 2013 AO27, 2013 AB53, 2013 AA32, 2012 XF112, 2008 XE2, 2002 AY1, 68548, 25916, 229672, 159533, 153267, 141052, 137199, 5646, 3554, 3200, 1916, 1620
304Las Campanas Obs. in Chile, 1 in MPEC 2013-A51 -- 2012 DA14
844Los Molinos Obs. in Uruguay, 2 in MPEC 2013-A51 -- 99942, 349068
H01Magdalena Ridge Obs. (MRO) in New Mexico, 12 in MPECs 2013-A52, 2013-A53, 2013-A54, 2013-A55, 2013-A56, 2013-A57, 2013-A59, 2013-A60, 2013-A61, 2013-A62, 2013-A63 & 2013-A64 -- 2013 AZ52, 2013 AY52, 2013 AX52, 2013 AW52, 2013 AG53, 2013 AF53, 2013 AE53, 2013 AD53, 2013 AC53, 2013 AA53, 2012 YF8, 2003 BN4
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2013-A57 & 2013-A66 -- 2013 AA53, P/2012 WA34
900Moriyama Obs. in Japan, 2 in MPECs 2013-A54 & 2013-A59 -- 2013 AX52, 2013 AC53
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2013-A51, 2013-A53, 2013-A54, 2013-A55, 2013-A56, 2013-A60, 2013-A61, 2013-A62 & 2013-A66 -- 2013 AZ52, 2013 AY52, 2013 AX52, 2013 AW52, 2013 AS27, 2013 AE53, 2013 AD53, P/2012 WA34, 2003 BN4, 2001 YT3, 52761, 349063, 229672, 11284
C27Pallerols Obs. in Spain, 2 in MPEC 2013-A51 -- 262623, 4179
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2013-A51, 2013-A57, 2013-A58 & 2013-A66 -- 2013 AB53, 2013 AA53, P/2012 WA34, 2002 DU3, 136635, 1685
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPECs 2013-A55 & 2013-A62 -- 2013 AY52, 2013 AW52
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-A55 -- 2013 AY52
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-A51 -- 99942
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2013-A54, 2013-A55 & 2013-A62 -- 2013 AY52, 2013 AX52, 2013 AW52
H36Sandlot Obs. in Kansas, 7 in MPECs 2013-A51, 2013-A54, 2013-A55, 2013-A57, 2013-A62, 2013-A64 & 2013-A65 -- 2013 AY52, 2013 AX52, 2013 AW52, 2013 AS27, 2013 AH53, 2013 AG53, 2013 AA53
204Schiaparelli Obs. in Italy, 4 in MPECs 2013-A54, 2013-A55, 2013-A59 & 2013-A62 -- 2013 AY52, 2013 AX52, 2013 AW52, 2013 AC53
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2013-A51 & 2013-A55 -- 2013 AY52, 2012 XF17, 2007 AG12, 2005 RN33, 2001 YM2, 159923, 5189
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2013-A51, 2013-A52, 2013-A53, 2013-A54, 2013-A55, 2013-A56, 2013-A57, 2013-A58, 2013-A59, 2013-A60, 2013-A61, 2013-A62, 2013-A63, 2013-A64 & 2013-A65 -- 2013 AZ52, 2013 AY52, 2013 AX52, 2013 AW52, 2013 AH53, 2013 AG53, 2013 AF53, 2013 AE53, 2013 AE4, 2013 AD53, 2013 AC53, 2013 AB53, 2013 AA53, 2012 YP3, 2012 YF8, 2011 HQ, 2007 ES, 2003 BN4
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-A58 -- 2013 AB53
I89iTelescope Obs. Nerpio in Spain, 2 in MPECs 2013-A54 & 2013-A58 -- 2013 AX52, 2013 AB53
Q625program code 5 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A55 -- 2013 AY52
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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.
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
2013 AE4JPL Sentry1601R E M O V E DJPL: Risk listing removed at 1049 UTC.
2012 YR1JPL Sentry16012077-210544.1e-05-5.45-5.510JPL: "Analysis based on 17 observations spanning 20.118 days (2012-Dec-20.20945 to 2013-Jan-09.32707)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS16012077-209954.7e-05-5.39-5.470NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-12-20.210 to 2013-01-09.328."
2012 DA14JPL Sentry16012078-211181.8e-06-5.78-5.870JPL: "Analysis based on 191 observations spanning 321.02 days (2012-Feb-23.03431 to 2013-Jan-09.05349)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS16012077-210099.95e-06-5.01-5.260NEODyS: "Based on 194 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-01-09.054."
99942 Apophis (2004 MN4)NEODyS16012036-2105197.45e-06-3.19-3.330NEODyS: "Based on 444 optical observations (of which 0 are rejected as outliers) from 2004-03-15.108 to 2012-12-29.580 and also on seven radar data points on 2005-01-27, 2005-01-29, 2005-01-31, 2005-08-07 and 2006-05-06."

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 January '13

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

2251Updated Traffic Report
2133Grabbed MPEC 2013-A66 - Comet P/2012 WA34 (Lemmon-Panstarrs) - see above
2046Grabbed MPEC 2013-A63 - 2013 AF53 - see above
Grabbed MPEC 2013-A64 - 2013 AG53 - see above
Grabbed MPEC 2013-A65 - 2013 AH53 - see above
1803Grabbed MPEC 2013-A58 - 2013 AB53 - see above
Grabbed MPEC 2013-A59 - 2013 AC53 - see above
Grabbed MPEC 2013-A60 - 2013 AD53 - see above
Grabbed MPEC 2013-A61 - 2013 AE53 - see above
Grabbed MPEC 2013-A62 - 2013 AW52 - see above
1700Grabbed MPEC 2013-A54 - 2013 AX52 - see above
Grabbed MPEC 2013-A55 - 2013 AY52 - see above
Grabbed MPEC 2013-A56 - 2013 AZ52 - see above
Grabbed MPEC 2013-A57 - 2013 AA53 - see above
1601Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that JPL Sentry has updated its 2012 YR1 risk assessment - see above
Noted that NEODyS has updated its 2012 YR1 risk assessment - see above
Noted that JPL Sentry has removed 2013 AE4 as an impact risk - see above
Grabbed MPEC 2013-A51 - Daily Orbit Update - see above
Grabbed MPEC 2013-A52 - 2012 YF8 - see above
Grabbed MPEC 2013-A53 - 2003 BN4 - see above