Contents  on 13 October '12

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 October '12

Three objects reported inside ten LD

There are three objects reported flying inside ten lunar distances (LD) of our planet today. Intruder 2012 TC4 (risk-listed radar target) is receding but still within one LD of the Moon until 1243 UT. Further away, intruder 2012 TM79 is outbound from 7.00 to 9.12 LD and 2012 TE79 comes inside ten LD, traveling from 11.80 to 9.95 LD.

On approach next, 2012 TD79 arrives inside ten LD on October 16th and 2010 JK1 on November 22nd.

This report was generated at 1558 UTC with follow-up in today's DOU MPEC for 2012 TC4.

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 October '12

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 44 were "one nighters." So far The Tracking News has counted a total of 84 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 October '12

Minor Planet Electronic Circulars

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

MPEC 2012-T81 - "17:43 UT" - 2012 TR139

MPEC 2012-T80 - "17:41 UT" - 2012 TQ139

MPEC 2012-T79 - "17:38 UT" - 2012 TP139

MPEC 2012-T78 - "17:36 UT" - 2012 TO139

MPEC 2012-T77 - "17:34 UT" - 2012 TN139

MPEC 2012-T76 - "17:31 UT" - 2012 TM139

MPEC 2012-T75 - "17:29 UT" - 2012 TL139

<< DOU on 13 Oct. '12 >>  MPEC 2012-T74 - "06:04 UT" - Daily Orbit Update

Observers  on 13 October '12

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 3 in MPEC 2012-T74 -- 2012 TG53, 2012 RV16, 2012 QB17
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-T74, 2012-T76 & 2012-T78 -- 2012 TO139, 2012 TM139, 2012 GV17
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-T79 -- 2012 TP139
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2012-T76, 2012-T80 & 2012-T81 -- 2012 TR139, 2012 TQ139, 2012 TM139
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2012-T74, 2012-T75, 2012-T77, 2012-T78 & 2012-T81 -- 2012 TR20, 2012 TR139, 2012 TO139, 2012 TN139, 2012 TL139, 2012 TH79, 2012 RL2, 2012 PQ28, 2012 KK18, 2002 NY31
I17Cupillari Obs. in Pennsylvania, 4 in MPEC 2012-T74 -- 2012 SA59, 2012 RV16, 2012 JS11, 303262
113Drebach Obs. in Germany, 3 in MPECs 2012-T76, 2012-T79 & 2012-T80 -- 2012 TQ139, 2012 TP139, 2012 TM139
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2012-T74 & 2012-T80 -- 2012 TQ139, 2012 RH10
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2012-T81 -- 2012 TR139
J95Great Shefford Obs. in England, 1 in MPEC 2012-T74 -- 2012 TG53
A35Hormersdorf Obs. in Germany, 1 in MPEC 2012-T74 -- 2012 SA59
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2012-T75, 2012-T76, 2012-T79 & 2012-T81 -- 2012 TR139, 2012 TP139, 2012 TM139, 2012 TL139
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-T74 -- 2012 PA20
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-T74 -- 2012 LZ1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2012-T78 & 2012-T81 -- 2012 TR139, 2012 TO139
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-T74 -- 2007 TF68
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2012-T74, 2012-T75, 2012-T76 & 2012-T77 -- 2012 TN139, 2012 TM139, 2012 TL139, 5587
J41Raheny Obs. in Ireland, 1 in MPEC 2012-T79 -- 2012 TP139
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2012-T79 & 2012-T81 -- 2012 TR139, 2012 TP139
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-T75 -- 2012 TL139
204Schiaparelli Obs. in Italy, 17 in MPECs 2012-T74, 2012-T75, 2012-T78 & 2012-T81 -- 2012 TZ52, 2012 TS5, 2012 TS, 2012 TR139, 2012 TO139, 2012 TL139, 2012 TG53, 2012 TC4, 2012 QE50, 2012 GV17, 2010 OF101, 2010 HQ80, 2009 SO103, 2004 TL19, 2002 TY68, 2001 SF262, 1999 TZ4 Canary Islands Obs. in the Canary Islands, 3 in MPEC 2012-T74 -- 2012 TZ52, 2005 JU1, 3200
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-T79 -- 2012 TP139
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2012-T74 & 2012-T77 -- 2012 TN139, 2006 WX1
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2012-T75, 2012-T76, 2012-T78 & 2012-T79 -- 2012 TP139, 2012 TO139, 2012 TM139, 2012 TL139
C36Starry Wanderer Obs. in Belarus, 2 in MPEC 2012-T74 -- 2012 JS11, 2005 GQ21
954Teide Obs. in the Canary Islands, 5 in MPECs 2012-T74, 2012-T76, 2012-T79, 2012-T80 & 2012-T81 -- 2012 TR139, 2012 TQ139, 2012 TP139, 2012 TM139, 2012 SA59
I42Westport Obs. in Massachusetts, 2 in MPEC 2012-T74 -- 2012 RV16, 2012 QB17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 October '12

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
2012 TO139JPL Sentry20312019-2108431.4e-06-2.23-2.620JPL: "Analysis based on 20 observations spanning 1.7454 days (2012-Oct-11.25361 to 2012-Oct-12.99902)." Diameter approximately 0.378 km. from mean, weighted H=19.8.
NEODyS19162024-2095284.16e-07-3.25-4.00NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2012-10-11.254 to 2012-10-12.999."
2012 TH79NEODyS1555R E M O V E D-
JPL Sentry1555R E M O V E DJPL: Risk listing removed at 0850 UTC.
2012 TC4JPL Sentry15552020-2106766.0e-05-4.97-5.930JPL: "Analysis based on 281 observations spanning 7.2807 days (2012-Oct-04.467673 to 2012-Oct-11.74842)." Diameter approximately 0.015 km. from mean, weighted H=26.7.
NEODyS15552020-2098313.53e-06-6.26-7.040NEODyS: "Based on 281 optical observations (of which 2 are rejected as outliers) from 2012-10-04.468 to 2012-10-11.749."

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 October '12

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

2031Noted that JPL Sentry has posted 2012 TO139 as an impact risk - see above
1916Noted that NEODyS has posted 2012 TO139 as an impact risk - see above
1806Grabbed MPEC 2012-T79 - 2012 TP139 - see above
Grabbed MPEC 2012-T80 - 2012 TQ139 - see above
Grabbed MPEC 2012-T81 - 2012 TR139 - see above
1737Grabbed MPEC 2012-T75 - 2012 TL139 - see above
Grabbed MPEC 2012-T76 - 2012 TM139 - see above
Grabbed MPEC 2012-T77 - 2012 TN139 - see above
Grabbed MPEC 2012-T78 - 2012 TO139 - see above
1558Generated Traffic Report
1555Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Noted that JPL Sentry has removed 2012 TH79 as an impact risk - see above
Noted that NEODyS has removed 2012 TH79 as an impact risk - see above
Grabbed MPEC 2012-T74 - Daily Orbit Update - see above