Contents  on 8 October '12

Asteroid/Comet Connection (A/CC) Resources:

  Note: The A/CC news pages will update only occasionally through early October 12th UTC.

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 8 October '12

Two objects reported inside ten LD

Two objects are reported within ten lunar distances (LD) of our planet today. Risk-listed intruder 2012 TV exits Earth's Hill sphere, traveling from 1.55 to 5.20 LD. Further away, risk-listed intruder 2012 TC4 is inbound from 6.28 to 4.80 LD.

Next known to approach Earth, 2010 JK1 arrives inside ten LD on November 22nd.

This report was generated at 1826 UTC with follow-up in today's DOU MPEC for 2012 TV.


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 8 October '12

The MPC's NEO Confirmation Page has 180 listings

When last checked at 2318 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 180 objects listed. Of these, 145 were "one nighters." So far The Tracking News has counted a total of 234 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 8 October '12

Minor Planet Electronic Circulars

As of last check at 2318 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-T24 - "17:02 UT" - Comet P/1997 C1 = 2012 S5 (Gehrels)


MPEC 2012-T23 - "12:50 UT" - 2012 TT5


MPEC 2012-T22 - "12:48 UT" - 2012 TS5


MPEC 2012-T21 - "12:45 UT" - 2012 TR5


MPEC 2012-T20 - "12:43 UT" - 2012 TQ5


<< DOU on 8 Oct. '12 >>  MPEC 2012-T19 - "06:03 UT" - Daily Orbit Update

Observers  on 8 October '12

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-T22 -- 2012 TS5
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2012-T20, 2012-T21 & 2012-T22 -- 2012 TS5, 2012 TR5, 2012 TQ5
300Bisei Spaceguard Center in Japan, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2012-T20 & 2012-T22 -- 2012 TS5, 2012 TQ5
970Chelmsford Obs. in England, 1 in MPEC 2012-T22 -- 2012 TS5
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPECs 2012-T19, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2009 TK, 2005 ST1
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-T20 -- 2012 TQ5
157Frasso Sabino Obs. in Italy, 3 in MPECs 2012-T19, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 QB17
J95Great Shefford Obs. in England, 5 in MPECs 2012-T19, 2012-T20, 2012-T21, 2012-T22 & 2012-T23 -- 2012 TV, 2012 TT5, 2012 TS5, 2012 TR5, 2012 TQ5
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-T19 -- 2012 RQ16
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2012-T20, 2012-T21, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 TR5, 2012 TQ5
932McCarthy Obs. in Connecticut, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5
900Moriyama Obs. in Japan, 2 in MPECs 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-T20, 2012-T21, 2012-T23 & 2012-T24 -- 2012 TT5, 2012 TR5, 2012 TQ5, P/2012 S5
A24New Millennium Obs. in Italy, 1 in MPEC 2012-T22 -- 2012 TS5
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-T19 -- 2012 OE1, 2012 OA1, 2008 SS251, 2004 TL19, 214869, 162900
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2012-T19 -- 2012 QB17, 2012 JS11, 333889
J41Raheny Obs. in Ireland, 1 in MPEC 2012-T22 -- 2012 TS5
H36Sandlot Obs. in Kansas, 3 in MPECs 2012-T20, 2012-T22 & 2012-T23 -- 2012 TT5, 2012 TS5, 2012 TQ5
0945program code 5 via Simeis Obs. in the Ukraine, 2 in MPEC 2012-T19 -- 2012 TV, 2009 TK
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-T24 -- P/2012 S5
926Tenagra II Obs. in Arizona, 2 in MPEC 2012-T19 -- 334412, 162900
B18Terskol Obs. in Russia, 1 in MPEC 2012-T23 -- 2012 TT5
I76Tesla Obs. in Spain, 1 in MPEC 2012-T19 -- 2012 RV16
718Wiggins Obs. in Utah, 1 in MPEC 2012-T22 -- 2012 TS5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 October '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2318 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 TC4NEODyS18192024-205742.52e-07-7.05-7.30NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2012-10-04.468 to 2012-10-07.519."
2012 TVJPL Sentry18192070-2107111.6e-06-5.85-6.170JPL: "Analysis based on 184 observations spanning 1.8162 days (2012-Oct-05.32361 to 2012-Oct-07.139772)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
NEODyS18192070-2096151.38e-06-5.91-6.370NEODyS: "Based on 186 optical observations (of which 2 are rejected as outliers) from 2012-10-05.324 to 2012-10-07.141."

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 8 October '12

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

1826Generated Traffic Report
1819Noted that JPL Sentry has updated its 2012 TV risk assessment - see above
Noted that NEODyS has updated its 2012 TV risk assessment - see above
Grabbed MPEC 2012-T21 - 2012 TR5 - see above
1818Noted that NEODyS has posted 2012 TC4 as an impact risk - see above
Grabbed MPEC 2012-T19 - Daily Orbit Update - see above
Grabbed MPEC 2012-T20 - 2012 TQ5 - see above
Grabbed MPEC 2012-T22 - 2012 TS5 - see above
Grabbed MPEC 2012-T23 - 2012 TT5 - see above
Grabbed MPEC 2012-T24 - Comet P/1997 C1 = 2012 S5 (Gehrels) - see above