Contents  on 12 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 12 January '13

Three objects reported inside ten LD

Three objects are reported flying within ten lunar distances (LD) of Earth today, all outbound. 2013 AB4 is headed away from 6.47 to 6.80 LD, 2013 AF53 from 7.82 to 8.62 LD, and 2013 AC53 exits ten LD, moving from 8.66 to 10.07 LD.

Next known to be on approach is intruder 2012 DA14 (risk-listed radar target), which arrives inside ten LD on February 8th.

Today's first report was generated at 1624 UTC with follow-up in today's DOU MPEC for 2012 DA14.

2140 UTC update: Just noticed is that we missed reporting that a recently discovered object may have dipped inside ten LD on December 27th, perhaps reaching 9.3 LD (uncertainty +/- 3.2667 hours). 2013 AD32 was announced on January 9th (MPEC) and hasn't been reported observed since.


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 12 January '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, twelve were "one nighters." So far The Tracking News has counted a total of 40 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 12 January '13

Minor Planet Electronic Circulars

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


MPEC 2013-A79 - "21:42 UT" - 2010 AF30


MPEC 2013-A78 - "14:06 UT" - 2013 AX60


MPEC 2013-A77 - "14:03 UT" - 2013 AW60


MPEC 2013-A76 - "13:59 UT" - 2013 AV60


MPEC 2013-A75 - "13:15 UT" - 2013 AR60


MPEC 2013-A74 - "13:12 UT" - 2013 AQ60


MPEC 2013-A73 - "13:10 UT" - 2013 AP60


MPEC 2013-A72 - "13:07 UT" - 2013 AO60


MPEC 2013-A71 - "13:04 UT" - 2013 AN60


MPEC 2013-A70 - "13:02 UT" - 2013 AM60


<< DOU on 12 Jan. '13 >>  MPEC 2013-A69 - "06:03 UT" - Daily Orbit Update


MPEC 2013-A68 - "03:13 UT" - 1989 VB

Observers  on 12 January '13

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2013-A69, 2013-A73 & 2013-A74 -- 2013 AQ60, 2013 AP60, 2012 XY6, 2012 XJ55, 2012 XE17
C77Bernezzo Obs. in Italy, 3 in MPEC 2013-A69 -- 2012 YN6, 99942, 349068
300Bisei Spaceguard Center in Japan, 5 in MPECs 2013-A72, 2013-A74, 2013-A75, 2013-A76 & 2013-A77 -- 2013 AW60, 2013 AV60, 2013 AR60, 2013 AQ60, 2013 AO60
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2013-A73, 2013-A75 & 2013-A76 -- 2013 AV60, 2013 AR60, 2013 AP60
470Ceccano Obs. in Italy, 1 in MPEC 2013-A69 -- 99942
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2013-A70, 2013-A71, 2013-A76 & 2013-A77 -- 2013 AW60, 2013 AV60, 2013 AN60, 2013 AM60
822Cordoba Obs. in Argentina, 1 in MPEC 2013-A70 -- 2013 AM60
821Cordoba Obs. Bosque Alegre Station in Argentina, 1 in MPEC 2013-A77 -- 2013 AW60
958Dax Obs. in France, 2 in MPECs 2013-A75 & 2013-A76 -- 2013 AV60, 2013 AR60
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2013-A76 & 2013-A78 -- 2013 AX60, 2013 AV60
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-A70 -- 2013 AM60
006Fabra Obs., 6 in MPEC 2013-A69 -- 99907, 329338, 276397, 162004, 6455, 3360
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-A76 -- 2013 AV60
704LINEAR in New Mexico, 1 in MPEC 2013-A76 -- 2013 AV60
304Las Campanas Obs. in Chile, 1 in MPEC 2013-A69 -- 2012 DA14
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2013-A68, 2013-A71, 2013-A73, 2013-A74, 2013-A75, 2013-A76 & 2013-A78 -- 2013 AX60, 2013 AV60, 2013 AR60, 2013 AQ60, 2013 AP60, 2013 AN60, 1989 VB
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-A79 -- 2010 AF30
118Modra Obs. in Slovakia, 1 in MPEC 2013-A73 -- 2013 AP60
900Moriyama Obs. in Japan, 1 in MPEC 2013-A75 -- 2013 AR60
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-A68, 2013-A72, 2013-A74, 2013-A77 & 2013-A78 -- 2013 AX60, 2013 AW60, 2013 AQ60, 2013 AO60, 1989 VB
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2013-A69 & 2013-A71 -- 2013 AN60, 2013 AG53, 2012 YF8, 2012 XC112, 2012 VL94, 2010 XL69, 2009 XF2, 159533
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPECs 2013-A70 & 2013-A76 -- 2013 AV60, 2013 AM60
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2013-A68, 2013-A72, 2013-A74 & 2013-A77 -- 2013 AW60, 2013 AQ60, 2013 AO60, 1989 VB
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-A72 -- 2013 AO60
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-A69 -- 99942
204Schiaparelli Obs. in Italy, 8 in MPECs 2013-A69, 2013-A71, 2013-A73, 2013-A74, 2013-A75 & 2013-A76 -- 2013 AV60, 2013 AR60, 2013 AQ60, 2013 AP60, 2013 AN60, 341050, 337084, 333908
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2013-A69 & 2013-A70 -- 2013 AM60, 2012 XC112, 4957
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-A68 -- 1989 VB
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2013-A68, 2013-A69, 2013-A71, 2013-A72, 2013-A73, 2013-A74 & 2013-A77 -- 2013 AW60, 2013 AQ60, 2013 AP60, 2013 AO60, 2013 AN60, 2012 XS111, 2009 EK1, 1989 VB
Q621program code 1 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A70 -- 2013 AM60
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-A69 -- 99942
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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
2012 DA14JPL Sentry1618211011.3e-10-10.03-10.00JPL: "Analysis based on 194 observations spanning 323.05 days (2012-Feb-23.03431 to 2013-Jan-11.0873)." Diameter approximately 0.046 km. from mean, weighted H=24.4.
NEODyS16182096-210032.99e-07-6.61-6.680NEODyS: "Based on 197 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-01-11.088."

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 12 January '13

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

2150Grabbed MPEC 2013-A79 - 2010 AF30 - see above
2140Updated Traffic Report
1618Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Grabbed MPEC 2013-A69 - Daily Orbit Update - see above
Grabbed MPEC 2013-A70 - 2013 AM60 - see above
Grabbed MPEC 2013-A71 - 2013 AN60 - see above
Grabbed MPEC 2013-A72 - 2013 AO60 - see above
Grabbed MPEC 2013-A73 - 2013 AP60 - see above
Grabbed MPEC 2013-A74 - 2013 AQ60 - see above
Grabbed MPEC 2013-A75 - 2013 AR60 - see above
Grabbed MPEC 2013-A76 - 2013 AV60 - see above
Grabbed MPEC 2013-A77 - 2013 AW60 - see above
Grabbed MPEC 2013-A78 - 2013 AX60 - see above
0333Grabbed MPEC 2013-A68 - 1989 VB - see above