Contents  on 15 January '12

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 15 January '12

Two objects reported inside ten LD

Two asteroids are reported passing within ten lunar distances (LD) of our planet today. 2012 AQ10 comes inward from 3.31 to 2.39 LD, inside Earth's Hill sphere, and radar target 2011 YH40 comes in from 6.45 to 5.57 LD. Radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 1847 UTC with follow-up in today's DOU MPEC for 2012 AQ10 and 2011 YH40 plus departed 2012 AP10 and 2011 YT62.


Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) has a radius estimated at about 3.89 LD. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline plus current additional details, sky chart, and ephemerides.

NEOCP Activity  on 15 January '12

The MPC's NEO Confirmation Page has 8 listings

When last checked at 2303 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of sixteen 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 15 January '12

Minor Planet Electronic Circulars

As of last check at 2303 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-A62 - "22:35 UT" - 2012 AC11


MPEC 2012-A61 - "22:33 UT" - 2012 AB11


MPEC 2012-A60 - "22:31 UT" - 2012 AA11


<< DOU on 15 Jan. '12 >>  MPEC 2012-A59 - "06:04 UT" - Daily Orbit Update

Observers  on 15 January '12

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-A59 & 2012-A60 -- 2012 AO10, 2012 AA11, 2011 YZ28, 2011 YH40, 2011 YD40
160Castelmartini Obs. in Italy, 2 in MPECs 2012-A60 & 2012-A61 -- 2012 AB11, 2012 AA11
703Catalina Sky Survey (CSS) in Arizona, 17 in MPEC 2012-A59 -- 2012 AY, 2011 YV15, 2011 YM63, 2011 GD62, 2010 CL19, 21088, 175706, 162186, 142348, 141018, 138911, 7753, 7358, 6050, 4503, 2061, 1943
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-A59 -- 162186
448Desert Moon Obs. in New Mexico, 6 in MPEC 2012-A59 -- 2012 AY, 2011 YZ28, 2011 YM63, 2011 YJ28, 141056, 9400
151Eschenberg Obs. in Switzerland, 1 in MPEC 2012-A59 -- 311555
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2012-A60, 2012-A61 & 2012-A62 -- 2012 AC11, 2012 AB11, 2012 AA11
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 2 in MPEC 2012-A59 -- 2012 AT10, 2011 YV62
157Frasso Sabino Obs. in Italy, 1 in MPEC 2012-A59 -- 2011 XO3
J95Great Shefford Obs. in England, 5 in MPECs 2012-A59, 2012-A60, 2012-A61 & 2012-A62 -- 2012 AQ10, 2012 AP10, 2012 AC11, 2012 AB11, 2012 AA11
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-A59 -- 21088
704LINEAR in New Mexico, 10 in MPECs 2012-A59, 2012-A60 & 2012-A61 -- 2012 AB11, 2012 AA11, 2008 WZ13, 2003 BL1, 32906, 311555, 29075, 24475, 20826, 1620
844Los Molinos Obs. in Uruguay, 2 in MPEC 2012-A59 -- 2012 AY, 138911
B82Maidbronn Obs. in Germany, 1 in MPEC 2012-A60 -- 2012 AA11
932McCarthy Obs. in Connecticut, 1 in MPEC 2012-A61 -- 2012 AB11
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-A59 & 2012-A62 -- 2012 AC11, 2011 YH6, 2011 YA63, 2008 AB31
644NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2012-A59 -- 85640, 68372
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-A59 -- 85713
A13Naef Obs. in Switzerland, 2 in MPEC 2012-A59 -- 2012 AY, 262623
A24New Millennium Obs. in Italy, 3 in MPECs 2012-A60, 2012-A61 & 2012-A62 -- 2012 AC11, 2012 AB11, 2012 AA11
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2012-A59 -- 2012 AY, 2012 AC3, 2011 WV134
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2012-A59 -- 2012 AE1, 2011 YH40, 2011 XE1, 2011 WV134, 2011 SR69, 2008 WZ13, 2003 AF23, 1996 AE2, 433
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-A60 -- 2012 AA11
B04Saint-Barthelemy Obs. in Italy, 3 in MPECs 2012-A60, 2012-A61 & 2012-A62 -- 2012 AC11, 2012 AB11, 2012 AA11
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-A59, 2012-A60, 2012-A61 & 2012-A62 -- 2012 AP10, 2012 AC11, 2012 AB11, 2012 AA11
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-A59, 2012-A61 & 2012-A62 -- 2012 AP10, 2012 AC11, 2012 AB11, 2011 YT62
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-A62 -- 2012 AC11
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-A59 -- 141018
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2012-A59 -- 2011 YJ28, 2011 YC29, 2011 WP69, 2011 UH21
A78Stia Obs. in Italy, 2 in MPEC 2012-A59 -- 2012 AY, 2011 WV134
A48Verona Obs. in Italy, 2 in MPEC 2012-A59 -- 2012 AE1, 2011 YH40
C44Volta Obs. in Italy, 2 in MPECs 2012-A61 & 2012-A62 -- 2012 AC11, 2012 AB11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 January '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2328 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 AP10NEODyS20052064-2090407.32e-05-5.06-5.710NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2012-01-11.084 to 2012-01-15.167."
JPL Sentry17472062-21111051.6e-04-4.77-5.480JPL: "Analysis based on 40 observations spanning 4.0822 days (2012-Jan-11.08359 to 2012-Jan-15.165808)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
2011 YV62JPL Sentry17472063-2096134.4e-06-3.41-3.460JPL: "Analysis based on 37 observations spanning 15.045 days (2011-Dec-30.23271 to 2012-Jan-14.27737)." Diameter approximately 0.220 km. from mean, weighted H=21.0.
NEODyS17472063-2087134.03e-06-3.45-3.470NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2011-12-30.233 to 2012-01-14.278."

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 15 January '12

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

2303Grabbed MPEC 2012-A62 - 2012 AC11 - see above
2234Grabbed MPEC 2012-A60 - 2012 AA11 - see above
Grabbed MPEC 2012-A61 - 2012 AB11 - see above
2005Noted that NEODyS has updated its 2012 AP10 risk assessment - see above
1847Updated Traffic Report
1747Noted that JPL Sentry has updated its 2011 YV62 risk assessment - see above
Noted that NEODyS has updated its 2011 YV62 risk assessment - see above
Noted that JPL Sentry has updated its 2012 AP10 risk assessment - see above
Grabbed MPEC 2012-A59 - Daily Orbit Update - see above