Contents  on 14 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 14 October '12

Three objects reported inside ten LD

Three asteroids are reported traveling inside ten lunar distances (LD) of our planet today. Intruder 2012 TC4 (risk-listed radar target) leaves Earth's Hill sphere, going from 2.65 to 4.12 LD. Out further, 2012 TE79 is inbound from 9.95 to 8.27 LD and intruder 2012 TM79 exits ten LD, moving from 9.12 to 11.24 LD.

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

This report was generated at 1609 UTC with follow-up in today's DOU MPEC for 2012 TE79 and 2012 TD79 plus the recovery and first follow-up for departed risk-listed 2012 TP20.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 14 October '12

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2310 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 70 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 14 October '12

Minor Planet Electronic Circulars

As of last check at 2310 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-T83 - "21:36 UT" - 2012 TT145

<< DOU on 14 Oct. '12 >>  MPEC 2012-T82 - "06:04 UT" - Daily Orbit Update

Observers  on 14 October '12

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-T82 & 2012-T83 -- 2012 TZ52, 2012 TT5, 2012 TT145, 2012 TS5, 2012 TS, 2012 TE79, 2012 TB53, 2012 SZ49, 2012 SN30, 2012 SH32, 2012 RV16, 2012 QY14, 2012 QB17, 2012 PS17, 2012 GV17
I74Baxter Garden Obs. in England, 3 in MPEC 2012-T82 -- 2006 CV, 1999 TX2, 285638
A74Bergen-Enkheim Obs. in Germany, 2 in MPEC 2012-T82 -- 2012 TZ52, 2012 TY79
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2012-T82 -- 2012 TG53, 2008 SS251, 2007 TR65, 2005 SH19, 2004 TL19, 85490, 207970
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2012-T82 -- 2012 TS, 2012 TR139, 2012 TK123, 2012 TJ79, 2012 HY33
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPEC 2012-T82 -- 2012 TT, 2012 TP20, 2012 TO139, 2012 SX20
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 2 in MPECs 2012-T82 & 2012-T83 -- 2012 TT145, 2012 TN139
J95Great Shefford Obs. in England, 1 in MPEC 2012-T83 -- 2012 TT145
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2012-T82 -- 2007 TF68
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-T83 -- 2012 TT145
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-T82 -- 219021
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2012-T82 -- 2012 JS11, 2005 ST1, 2002 UA31
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2012-T82 & 2012-T83 -- 2012 TT145, 159923, 3757
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2012-T82 & 2012-T83 -- 2012 TT145, 2012 QE50, 2012 JR17
204Schiaparelli Obs. in Italy, 7 in MPEC 2012-T82 -- 2012 TP139, 2012 TN20, 2012 TG53, 2012 TF53, 2012 TD79, 2012 SN30, 2012 SH32
J84South Obs. in England, 3 in MPEC 2012-T82 -- 2012 TE79, 2005 GQ21, 136993
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-T82 -- 237442, 163364
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2012-T82 -- 2012 TY52, 2012 TV78, 2012 TT, 2012 TS78, 2012 TO139, 2012 TH79, 2012 TF79, 2012 TF53
I76Tesla Obs. in Spain, 2 in MPEC 2012-T82 -- 2012 TG53, 2012 RV16
718Wiggins Obs. in Utah, 2 in MPEC 2012-T82 -- 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 14 October '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2309 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 Sentry16072019-2108245.8e-07-2.59-2.840JPL: "Analysis based on 26 observations spanning 2.8800 days (2012-Oct-11.25361 to 2012-Oct-14.13362)." Diameter approximately 0.389 km. from mean, weighted H=19.7.
NEODyS16072040-2086114.02e-07-3.31-3.450NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2012-10-11.254 to 2012-10-14.134."
2012 TF79JPL Sentry1607R E M O V E DJPL: Risk listing removed at 0956 UTC.
2012 TS78JPL Sentry16072026-2112275.1e-07-2.48-2.530JPL: "Analysis based on 31 observations spanning 5.9468 days (2012-Oct-08.20071 to 2012-Oct-14.14746)." Diameter approximately 0.698 km. from mean, weighted H=18.4.
NEODyS16072026-2100174.85e-07-2.48-2.530NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2012-10-08.201 to 2012-10-14.148."
2012 TP20JPL Sentry16072064-211257.8e-07-7.73-8.170JPL: "Analysis based on 17 observations spanning 5.7398 days (2012-Oct-08.19843 to 2012-Oct-13.93821)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
NEODyS16072064-209833.01e-07-8.07-8.370NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-10-08.199 to 2012-10-13.939."

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 14 October '12

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

2204Grabbed MPEC 2012-T83 - 2012 TT145 - see above
1609Generated Traffic Report
1607Noted that JPL Sentry has removed 2012 TF79 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 TO139 risk assessment - see above
Noted that NEODyS has updated its 2012 TO139 risk assessment - see above
Noted that JPL Sentry has updated its 2012 TP20 risk assessment - see above
Noted that NEODyS has posted 2012 TP20 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 TS78 risk assessment - see above
Noted that NEODyS has updated its 2012 TS78 risk assessment - see above
Grabbed MPEC 2012-T82 - Daily Orbit Update - see above