Contents  on 10 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 10 October '12

Three objects reported inside ten LD

There are three visitors reported traveling within ten lunar distances (LD) of Earth today. Inside Earth's Hill sphere, intruder 2012 TC4 (risk-listed radar target) is inbound from 3.33 to 1.86 LD. Out further, risk-listed intruder 2012 TV exits ten LD, moving from 8.94 to 12.70 LD, as does newly announced 2012 TE53, passing from 9.15 to 11.39 LD.

Coming toward Earth next, 2010 JK1 arrives inside ten LD on November 22nd.

This report was generated at 2152 UTC with new discoveries 2012 TJ53 (MPEC) and 2012 TE53 (MPEC) plus follow-up in today's DOU MPEC for 2012 TC4 as well as departed 2012 SR56 and 2012 RR16.


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 10 October '12

The MPC's NEO Confirmation Page has 137 listings

When last checked at 2137 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 137 objects listed. Of these, 114 were "one nighters." So far The Tracking News has counted a total of 206 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 10 October '12

Minor Planet Electronic Circulars

As of last check at 2137 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-T46 - "18:36 UT" - 2012 TJ53


MPEC 2012-T45 - "18:33 UT" - 2012 TH53


MPEC 2012-T44 - "18:30 UT" - 2012 TG53


MPEC 2012-T43 - "18:27 UT" - 2012 TF53


MPEC 2012-T42 - "17:16 UT" - 2012 TE53


MPEC 2012-T41 - "17:14 UT" - 2012 TD53


MPEC 2012-T40 - "17:12 UT" - 2012 TC53


MPEC 2012-T39 - "17:10 UT" - 2012 TB53


MPEC 2012-T38 - "17:07 UT" - 2012 TA53


MPEC 2012-T37 - "17:05 UT" - 2012 TZ52


MPEC 2012-T36 - "17:02 UT" - 2012 TY52


MPEC 2012-T35 - "16:59 UT" - 2012 TX52


<< DOU on 10 Oct. '12 >>  MPEC 2012-T34 - "06:04 UT" - Daily Orbit Update

Observers  on 10 October '12

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2012-T34, 2012-T36, 2012-T37, 2012-T38, 2012-T39, 2012-T40, 2012-T41, 2012-T43 & 2012-T45 -- 2012 TZ52, 2012 TY52, 2012 TT5, 2012 TS, 2012 TH53, 2012 TF53, 2012 TD53, 2012 TC53, 2012 TC4, 2012 TB53, 2012 TA53, 2012 SY20, 2012 SQ56, 2012 RP15, 2012 QE50, 2012 MU2, 2012 HM1, 1998 SE36
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-T34 -- 2012 TC4
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-T34 -- 2012 TC4
703Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2012-T34, 2012-T42, 2012-T44 & 2012-T46 -- 2012 TJ53, 2012 TG53, 2012 TE53, 2012 SK8, 2012 SB22, 2012 QY14, 2012 QP17, 2012 QJ2, 2012 QF49, 2012 HO15, 2009 TK, 2009 DK46, 1999 HA2, 335746, 333889, 331990, 318411, 303262, 155334, 136993, 7888, 5751
470Ceccano Obs. in Italy, 1 in MPEC 2012-T34 -- 2012 TC4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-T44 -- 2012 TG53
1212Vasilij G. Shevchenko via Chuguevskaya Station in the Ukraine, 1 in MPEC 2012-T34 -- 214869
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-T37 -- 2012 TZ52
448Desert Moon Obs. in New Mexico, 6 in MPEC 2012-T34 -- 2012 SN30, 2012 RF15, 2008 XE2, 2007 VO243, 136993, 6569
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 4 in MPECs 2012-T34, 2012-T37 & 2012-T44 -- 2012 TZ52, 2012 TG53, 2012 TC4, 2009 TK
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-T34 -- 2012 TC4
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-T42 -- 2012 TE53
E103program code 3 via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-T34 -- 2012 TC4
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2012-T37 & 2012-T44 -- 2012 TZ52, 2012 TG53
857Iowa Robotic Obs. in Arizona, 1 in MPEC 2012-T34 -- 2012 TC4
704LINEAR in New Mexico, 8 in MPEC 2012-T34 -- 2012 PS17, 2008 HV4, 333284, 331963, 330233, 329520, 163899, 5731
J75La Sagra Obs. in Spain, 1 in MPEC 2012-T37 -- 2012 TZ52
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2012-T36, 2012-T37, 2012-T38, 2012-T40, 2012-T41, 2012-T42 & 2012-T43 -- 2012 TZ52, 2012 TY52, 2012 TF53, 2012 TE53, 2012 TD53, 2012 TC53, 2012 TA53
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2012-T34 -- 2012 TC4, 2012 RG15, 2012 QL14
900Moriyama Obs. in Japan, 1 in MPEC 2012-T44 -- 2012 TG53
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2012-T34 -- 2012 RM2
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2012-T34, 2012-T36, 2012-T38, 2012-T40, 2012-T45 & 2012-T46 -- 2012 TY52, 2012 TU, 2012 TJ53, 2012 TH53, 2012 TC53, 2012 TA53, 2012 SR56, 2012 QO10, 2007 RT19, 237442, 144922
A24New Millennium Obs. in Italy, 1 in MPEC 2012-T37 -- 2012 TZ52
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-T34 -- 178871
261`program code "`" (30) using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2012-T34 -- 2002 WQ4
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2012-T34, 2012-T35, 2012-T36, 2012-T39, 2012-T41, 2012-T43 & 2012-T45 -- 2012 TY52, 2012 TX52, 2012 TH53, 2012 TF53, 2012 TD53, 2012 TB53, 2012 SR56, 2012 RR16, 2004 CH52, 2000 CR101, 1998 SE36, 144411, 138815, 4587
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-T34 -- 2012 TC4
J41Raheny Obs. in Ireland, 2 in MPECs 2012-T37 & 2012-T42 -- 2012 TZ52, 2012 TE53
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-T34 -- 303262
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-T37, 2012-T42 & 2012-T44 -- 2012 TZ52, 2012 TG53, 2012 TE53
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-T34 -- 2012 TC4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-T34 -- 2012 TC4
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-T36, 2012-T37, 2012-T44 & 2012-T45 -- 2012 TZ52, 2012 TY52, 2012 TH53, 2012 TG53
G40Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2012-T34 -- 2012 RV16
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2012-T34, 2012-T35, 2012-T36 & 2012-T39 -- 2012 TY52, 2012 TX52, 2012 TU, 2012 TC4, 2012 TB53, 2012 SV20, 2012 SL8, 2012 PA20
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2012-T44 & 2012-T45 -- 2012 TH53, 2012 TG53
954Teide Obs. in the Canary Islands, 2 in MPECs 2012-T34 & 2012-T44 -- 2012 TG53, 3838
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-T34 -- 2012 SB22
718Wiggins Obs. in Utah, 1 in MPEC 2012-T34 -- 2012 TC4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 October '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2137 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 TY52JPL Sentry19542014-202053.3e-06-2.71-3.180JPL: "Analysis based on 25 observations spanning 2.9275 days (2012-Oct-07.263715 to 2012-Oct-10.19122)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2012 TC4JPL Sentry21372020-2106603.7e-05-5.11-6.130JPL #2 for the day: "Analysis based on 130 observations spanning 6.0292 days (2012-Oct-04.467673 to 2012-Oct-10.496824)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS18122020-2098392.8e-05-5.20-6.150NEODyS: "Based on 127 optical observations (of which 0 are rejected as outliers) from 2012-10-04.468 to 2012-10-10.159."

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 10 October '12

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

2152Generated Traffic Report
2137Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
1954Noted that JPL Sentry has posted 2012 TY52 as an impact risk - see above
Grabbed MPEC 2012-T43 - 2012 TF53 - see above
Grabbed MPEC 2012-T44 - 2012 TG53 - see above
Grabbed MPEC 2012-T45 - 2012 TH53 - see above
Grabbed MPEC 2012-T46 - 2012 TJ53 - see above
1812Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Grabbed MPEC 2012-T34 - Daily Orbit Update - see above
Grabbed MPEC 2012-T35 - 2012 TX52 - see above
Grabbed MPEC 2012-T36 - 2012 TY52 - see above
Grabbed MPEC 2012-T37 - 2012 TZ52 - see above
Grabbed MPEC 2012-T38 - 2012 TA53 - see above
Grabbed MPEC 2012-T39 - 2012 TB53 - see above
Grabbed MPEC 2012-T41 - 2012 TD53 - see above
Grabbed MPEC 2012-T42 - 2012 TE53 - see above
1811Grabbed MPEC 2012-T40 - 2012 TC53 - see above