Contents  on 16 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 16 October '12

Four objects reported inside ten LD

There are four objects reported passing inside ten lunar distances (LD) of Earth today. Inside Earth's Hill sphere, newly announced 2012 TQ146 comes its closest to our planet on this passage, reaching 3.05 LD at 2346 UTC. Further out, intruder 2012 TC4 (risk-listed radar target) is outbound from 5.59 to 7.06 LD, 2012 TE79 is inbound from 6.88 to 5.96 LD, and 2012 TD79 comes inside ten LD, traveling from 12.24 to 9.75 LD.

On approach next, 2010 JK1 arrives inside ten LD on November 22nd.

This report was updated at 1844 UTC with new discovery 2012 TQ146 (MPEC). Today's first report was generated at 1516 UTC with follow-up in today's DOU MPEC for 2012 TE79, 2012 TD79, and departed 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 16 October '12

The MPC's NEO Confirmation Page has 56 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 56 objects listed. Of these, 29 were "one nighters." So far The Tracking News has counted a total of 69 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 16 October '12

Minor Planet Electronic Circulars

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


MPEC 2012-U06 - "19:54 UT" - 2012 TR146


MPEC 2012-U05 - "16:56 UT" - Comet C/2012 T4 (McNaught)


MPEC 2012-U04 - "16:14 UT" - Comet P/2012 T3 (Panstarrs)


MPEC 2012-U03 - "15:55 UT" - Comet P/2012 T2 (Panstarrs)


MPEC 2012-U02 - "15:48 UT" - 2012 TQ146


<< DOU on 16 Oct. '12 >>  MPEC 2012-U01 - "06:06 UT" - Daily Orbit Update

Observers  on 16 October '12

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2012-U02 & 2012-U06 -- 2012 TR146, 2012 TQ146
I74Baxter Garden Obs. in England, 2 in MPEC 2012-U01 -- 285638, 250458
C77Bernezzo Obs. in Italy, 2 in MPEC 2012-U01 -- 2012 JS11, 2002 TY68
703Catalina Sky Survey (CSS) in Arizona, 24 in MPEC 2012-U01 -- 2012 TG53, 2012 TD79, 2012 SB22, 2012 RX16, 2012 QB17, 2012 LE11, 2012 JS11, 2009 SO103, 2005 JU1, 2005 GQ21, 2003 UC20, 2002 RC118, 2001 UF18, 1999 TZ4, 96536, 85804, 33342, 17182, 162900, 159635, 155340, 137052, 112221, 10302
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2012-U04 & 2012-U05 -- C/2012 T4, P/2012 T3
448Desert Moon Obs. in New Mexico, 4 in MPEC 2012-U01 -- 2012 ST9, 2012 RX16, 2007 RT146, 1999 TX2
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 6 in MPECs 2012-U01, 2012-U02 & 2012-U03 -- 2012 TX52, 2012 TR139, 2012 TQ146, 2012 TF79, 2012 TE146, P/2012 T2
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 2 in MPECs 2012-U03 & 2012-U04 -- P/2012 T3, P/2012 T2
J95Great Shefford Obs. in England, 1 in MPEC 2012-U02 -- 2012 TQ146
B15Inastars Obs. in Germany, 3 in MPEC 2012-U01 -- 2008 AV28, 2006 VB14, 2000 QY69
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-U01 -- 2012 RQ16
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2012-U04 -- P/2012 T3
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-U01 -- 5587
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-U02 & 2012-U06 -- 2012 TR146, 2012 TQ146
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-U01, 2012-U02 & 2012-U06 -- 2012 TR146, 2012 TQ146, 2012 SZ49, 52381, 256004, 154007, 11054
J93Mt. Tuffley Obs. in England, 4 in MPEC 2012-U01 -- 330825, 276397, 214869, 136993
A13Naef Obs. in Switzerland, 2 in MPEC 2012-U01 -- 2012 TG53, 2007 RT19
C47Nonndorf Obs. in Austria, 3 in MPEC 2012-U01 -- 2012 RV16, 2012 QF49, 2012 JS11
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2012-U01, 2012-U03, 2012-U04 & 2012-U06 -- 2012 TR146, 2012 TJ146, 2012 TF79, 2012 TE146, P/2012 T3, P/2012 T2, 2012 QY14, 2012 ES14, 2008 XO2, 2005 GQ21, 2000 CR101, 1998 SE36, 4587
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 3 in MPECs 2012-U03, 2012-U04 & 2012-U05 -- C/2012 T4, P/2012 T3, P/2012 T2
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-U02 -- 2012 TQ146
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2012-U01 & 2012-U05 -- C/2012 T4, 89355, 277475
G40Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2012-U01 -- 2012 TG53
J84South Obs. in England, 4 in MPEC 2012-U01 -- 2012 TG53, 2012 TE79, 2012 TD79, 2012 RV16
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2012-U01 -- 2012 TP139, 2006 TN, 2000 CR101, 190119, 153306
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2012-U01, 2012-U03 & 2012-U04 -- 2012 TY52, 2012 TV78, 2012 TS78, 2012 TP20, 2012 TP139, 2012 TO139, 2012 TF53, P/2012 T3, P/2012 T2, 2012 RH3, 1999 YG3
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-U02 -- 2012 TQ146
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-U01 -- 88710
G56Walnut Creek Obs. in northern California, 2 in MPEC 2012-U01 -- 2012 TS5, 2012 RV16
I42Westport Obs. in Massachusetts, 3 in MPEC 2012-U01 -- 2012 SA59, 2012 QB17, 2008 HV4
718Wiggins Obs. in Utah, 3 in MPEC 2012-U01 -- 2012 TZ52, 2012 TG53, 2012 TD79
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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.
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 TO139JPL Sentry15142019-210892.9e-07-2.98-3.280JPL: "Analysis based on 32 observations spanning 4.9660 days (2012-Oct-11.25361 to 2012-Oct-16.21956)." Diameter approximately 0.385 km. from mean, weighted H=19.7.
NEODyS15142019-208632.76e-10-5.89-5.950NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2012-10-11.254 to 2012-10-16.220."
2012 TS78JPL Sentry15142026-2104133.0e-07-2.65-2.680JPL: "Analysis based on 34 observations spanning 7.0866 days (2012-Oct-08.20071 to 2012-Oct-15.28732)." Diameter approximately 0.700 km. from mean, weighted H=18.4.
NEODyS15142026-2098152.6e-07-2.67-2.690NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2012-10-08.201 to 2012-10-15.288."
2012 TP20JPL Sentry15142069-210236.5e-07-7.82-8.130JPL: "Analysis based on 20 observations spanning 7.2055 days (2012-Oct-08.19843 to 2012-Oct-15.40389)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
NEODyS1514R E M O V E D-

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 16 October '12

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

2008Grabbed MPEC 2012-U06 - 2012 TR146 - see above
1844Updated Traffic Report
1801Grabbed MPEC 2012-U02 - 2012 TQ146 - see above
Grabbed MPEC 2012-U03 - Comet P/2012 T2 (Panstarrs) - see above
Grabbed MPEC 2012-U04 - Comet P/2012 T3 (Panstarrs) - see above
Grabbed MPEC 2012-U05 - Comet C/2012 T4 (McNaught) - see above
1514Noted 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 removed 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-U01 - Daily Orbit Update - see above