Contents  on 17 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 17 October '12

Five objects reported inside ten LD

At least five asteroids are reported passing within ten lunar distances (LD) of Earth today. Inside Earth's Hill sphere, 2012 TQ146 is outbound from 3.05 to 3.71 LD. Further out, 2012 TE79 comes its closest to Earth this time around, reaching 5.73 LD at 1820 UTC. Intruder 2012 TC4 (risk-listed radar target) is outbound from 7.06 to 8.52 LD and 2012 TD79 is inbound from 9.75 to 7.90 LD. And newly announced 2012 TP231 comes inside ten LD, traveling from 10.31 to 9.00 LD.

Coming to the neighborhood next, 2010 JK1 arrives inside ten LD on November 22nd.

This report was generated at 2329 UTC with new discovery 2012 TP231 (MPEC). The Minor Planet Center reports that today's DOU MPEC was "abandoned" due to problems overnight. The MPC did post MPECs for four newly announced objects that it indicates are close passers (2012 TQ231, 2012 UF, and risk-listed 2012 TU231 and 2012 UE), however, for whatever reason, we were unable to obtain orbit solutions from JPL today for those objects and our traffic reporting is "dead in the water" without that data.


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 17 October '12

The MPC's NEO Confirmation Page has 64 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 64 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 94 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 17 October '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been nineteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts. No Daily Orbit Update DOU MPEC has been posted yet, so visit the MPC Status Page for possible explanation.


MPEC 2012-U25 - "22:49 UT" - 2012 TQ256


MPEC 2012-U24 - "17:23 UT" - 2012 UL


MPEC 2012-U23 - "17:20 UT" - 2012 UK


MPEC 2012-U22 - "17:17 UT" - 2012 UJ


MPEC 2012-U21 - "17:14 UT" - 2012 UH


MPEC 2012-U20 - "17:12 UT" - 2012 UG


MPEC 2012-U19 - "17:09 UT" - 2012 UF


MPEC 2012-U18 - "17:06 UT" - 2012 UE


MPEC 2012-U17 - "17:03 UT" - 2012 UD


MPEC 2012-U16 - "17:00 UT" - 2012 TV231


MPEC 2012-U15 - "16:57 UT" - 2012 TU231


MPEC 2012-U14 - "16:53 UT" - 2012 TT231


MPEC 2012-U13 - "16:50 UT" - 2012 TS231


MPEC 2012-U12 - "16:47 UT" - 2012 TR231


MPEC 2012-U11 - "16:44 UT" - 2012 TQ231


MPEC 2012-U10 - "16:16 UT" - 2012 TX78


MPEC 2012-U09 - "15:27 UT" - 2012 UC


MPEC 2012-U08 - "15:24 UT" - 2012 TP231


MPEC 2012-U07 - "15:20 UT" - 2012 TO231

Observers  on 17 October '12

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2012-U09, 2012-U12, 2012-U15, 2012-U16, 2012-U17, 2012-U20 & 2012-U25 -- 2012 UG, 2012 UD, 2012 UC, 2012 TV231, 2012 TU231, 2012 TR231, 2012 TQ256
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2012-U10, 2012-U13, 2012-U14, 2012-U15, 2012-U17, 2012-U19, 2012-U20 & 2012-U25 -- 2012 UG, 2012 UF, 2012 UD, 2012 TX78, 2012 TU231, 2012 TT231, 2012 TS231, 2012 TQ256
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2012-U07, 2012-U08, 2012-U09 & 2012-U12 -- 2012 UC, 2012 TR231, 2012 TP231, 2012 TO231
822Cordoba Obs. in Argentina, 1 in MPEC 2012-U08 -- 2012 TP231
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2012-U07, 2012-U08 & 2012-U12 -- 2012 TR231, 2012 TP231, 2012 TO231
651Grasslands Obs. in Arizona, 1 in MPEC 2012-U14 -- 2012 TT231
J95Great Shefford Obs. in England, 5 in MPECs 2012-U09, 2012-U14, 2012-U15, 2012-U17 & 2012-U19 -- 2012 UF, 2012 UD, 2012 UC, 2012 TU231, 2012 TT231
704LINEAR in New Mexico, 1 in MPEC 2012-U14 -- 2012 TT231
H01Magdalena Ridge Obs. (MRO) in New Mexico, 12 in MPECs 2012-U07, 2012-U09, 2012-U12, 2012-U14, 2012-U15, 2012-U16, 2012-U17, 2012-U18, 2012-U19, 2012-U21, 2012-U22 & 2012-U25 -- 2012 UJ, 2012 UH, 2012 UF, 2012 UE, 2012 UD, 2012 UC, 2012 TV231, 2012 TU231, 2012 TT231, 2012 TR231, 2012 TQ256, 2012 TO231
932McCarthy Obs. in Connecticut, 2 in MPECs 2012-U13 & 2012-U19 -- 2012 UF, 2012 TS231
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2012-U09, 2012-U11, 2012-U12, 2012-U13, 2012-U14, 2012-U15, 2012-U17, 2012-U18, 2012-U20, 2012-U21, 2012-U22, 2012-U23, 2012-U24 & 2012-U25 -- 2012 UL, 2012 UK, 2012 UJ, 2012 UH, 2012 UG, 2012 UE, 2012 UD, 2012 UC, 2012 TU231, 2012 TT231, 2012 TS231, 2012 TR231, 2012 TQ256, 2012 TQ231
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2012-U10, 2012-U16 & 2012-U25 -- 2012 TX78, 2012 TV231, 2012 TQ256
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-U12 -- 2012 TR231
204Schiaparelli Obs. in Italy, 3 in MPECs 2012-U07, 2012-U17 & 2012-U19 -- 2012 UF, 2012 UD, 2012 TO231
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2012-U07 & 2012-U08 -- 2012 TP231, 2012 TO231
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-U25 -- 2012 TQ256
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-U12, 2012-U13, 2012-U14, 2012-U16, 2012-U17, 2012-U18 & 2012-U21 -- 2012 UH, 2012 UE, 2012 UD, 2012 TV231, 2012 TT231, 2012 TS231, 2012 TR231
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-U10 -- 2012 TX78
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 UEJPL Sentry19122040-206699.3e-06-6.46-6.690JPL: "Analysis based on 18 observations spanning 1.0328 days (2012-Oct-16.25277 to 2012-Oct-17.2856)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2012 TU231JPL Sentry1912211112.5e-07-7.56-7.560JPL: "Analysis based on 25 observations spanning 1.9466 days (2012-Oct-15.19373 to 2012-Oct-17.14036)." Diameter approximately 0.019 km. from mean, weighted H=26.2.

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 17 October '12

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

2329Generated Traffic Report
2309Grabbed MPEC 2012-U25 - 2012 TQ256 - see above
1912Noted that JPL Sentry has posted 2012 TU231 as an impact risk - see above
Noted that JPL Sentry has posted 2012 UE as an impact risk - see above
1730Grabbed MPEC 2012-U16 - 2012 TV231 - see above
Grabbed MPEC 2012-U17 - 2012 UD - see above
Grabbed MPEC 2012-U18 - 2012 UE - see above
Grabbed MPEC 2012-U19 - 2012 UF - see above
Grabbed MPEC 2012-U20 - 2012 UG - see above
Grabbed MPEC 2012-U21 - 2012 UH - see above
Grabbed MPEC 2012-U22 - 2012 UJ - see above
Grabbed MPEC 2012-U23 - 2012 UK - see above
Grabbed MPEC 2012-U24 - 2012 UL - see above
1700Grabbed MPEC 2012-U11 - 2012 TQ231 - see above
Grabbed MPEC 2012-U12 - 2012 TR231 - see above
Grabbed MPEC 2012-U13 - 2012 TS231 - see above
Grabbed MPEC 2012-U14 - 2012 TT231 - see above
Grabbed MPEC 2012-U15 - 2012 TU231 - see above
1629Grabbed MPEC 2012-U10 - 2012 TX78 - see above
1600Grabbed MPEC 2012-U07 - 2012 TO231 - see above
Grabbed MPEC 2012-U08 - 2012 TP231 - see above
Grabbed MPEC 2012-U09 - 2012 UC - see above