Contents  on 25 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 25 October '12

Three objects reported inside ten LD

Three objects are reported flying within ten lunar distances (LD) of our planet today. 2012 US18 is outbound from 5.90 to 8.08 LD, 2012 UF34 from 6.52 to 8.66 LD, and 2012 TP231 from 7.37 to 8.49 LD.

Coming to the ten-LD "bubble" next are 2012 UW9 and 2012 UX136, which arrive inside ten LD on October 27th. 2012 UV136 arrives on November 1st, risk-listed 2012 UY68 on November 7th, and radar target 2010 JK1 on November 22nd.

This report was generated at 1507 UTC with follow-up in today's DOU MPEC for 2012 UX136, 2012 UV136, and departed 2012 UY136 and 2012 UU9, as well as observation of 2012 QG42 from August.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. 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 25 October '12

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 27 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 25 October '12

Minor Planet Electronic Circulars

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


MPEC 2012-U102 - "21:08 UT" - 2012 UR138


MPEC 2012-U101 - "21:06 UT" - 2012 UQ138


MPEC 2012-U100 - "20:57 UT" - 2012 UO138


MPEC 2012-U99 - "20:54 UT" - 2012 UN138


MPEC 2012-U98 - "18:28 UT" - P/1960 S1 = 2012 TB36 (Van Houten-Lemmon)


MPEC 2012-U97 - "17:27 UT" - 2011 DL19


MPEC 2012-U96 - "17:24 UT" - 2009 XF2


MPEC 2012-U95 - "16:56 UT" - Comet P/2012 TB36 (Lemmon)


<< DOU on 25 Oct. '12 >>  MPEC 2012-U94 - "06:09 UT" - Daily Orbit Update


MPEC 2012-U93 - "02:46 UT" - Comet P/2012 U2 (Panstarrs)

Observers  on 25 October '12

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2012-U94, 2012-U96, 2012-U97, 2012-U100, 2012-U101 & 2012-U102 -- 2012 UR138, 2012 UQ138, 2012 UO138, 2012 UD, 2012 UB69, 2012 TS5, 2012 TQ139, 2012 TP274, 2012 TK123, 2012 TJ146, 2012 RV16, 2012 QY14, 2011 DL19, 2009 XF2, 276397, 162900, 137032, 5587
B88Bigmuskie Obs. in Italy, 2 in MPEC 2012-U94 -- 141851, 12538
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-U94 -- 2012 UC69
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U102 -- 2012 UR138
E10#program code "#" (12) via Faulkes Telescope South in New South Wales, 3 in MPEC 2012-U94 -- 2012 TS, 2012 PQ28, 173561
E103program code 3 via Faulkes Telescope South in New South Wales, 4 in MPEC 2012-U94 -- 2012 UY136, 2012 UX136, 2012 UV136, 2012 UU136
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-U93 -- P/2012 U2
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-U93 -- P/2012 U2
704LINEAR in New Mexico, 10 in MPEC 2012-U94 -- 2012 UX27, 2012 UV68, 2012 UC69, 2012 LE11, 2012 JR17, 2008 XE2, 2002 TR190, 88710, 214869, 137199
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-U94 -- 2012 UU68, 2012 TF79
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2012-U93 -- P/2012 U2
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2012-U93, 2012-U94, 2012-U95 & 2012-U100 -- 2012 UO138, P/2012 U2, P/2012 TB36, 138893
A24New Millennium Obs. in Italy, 8 in MPEC 2012-U94 -- 2008 HV4, 2005 SH19, 2002 TY68, 333358, 250458, 18882, 17182, 153306
423North Ryde Obs. in New South Wales, 1 in MPEC 2012-U94 -- 3753
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2012-U93, 2012-U94, 2012-U95, 2012-U99, 2012-U101 & 2012-U102 -- 2012 UR138, 2012 UQ138, 2012 UN138, P/2012 U2, 2012 TQ78, P/2012 TB36, 2012 OO, 163364
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2012-U94 -- 2012 UC69, 2012 QF49, 2012 JS11
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U94 -- 2012 QG42
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U93 -- P/2012 U2
204Schiaparelli Obs. in Italy, 3 in MPECs 2012-U93, 2012-U100 & 2012-U102 -- 2012 UR138, 2012 UO138, P/2012 U2
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2012-U94 -- 2012 UV9, 2012 UU9, 2012 UC69, 2012 TB259
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-U99 -- 2012 UN138
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-U94, 2012-U100, 2012-U101 & 2012-U102 -- 2012 UZ33, 2012 UU68, 2012 UR138, 2012 UQ138, 2012 UO138, 2012 UE34, 2012 UA69
954Teide Obs. in the Canary Islands, 2 in MPEC 2012-U94 -- 2012 UC69, 277127
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-U99 -- 2012 UN138
A92Urseanu Obs. in Romania, 1 in MPEC 2012-U94 -- 136993
A48Verona Obs. in Italy, 2 in MPEC 2012-U94 -- 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 25 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 UR138JPL Sentry23592015-21102091.3e-06-3.60-4.170JPL: "Analysis based on 15 observations spanning 1.9812 days (2012-Oct-23.51174 to 2012-Oct-25.49296)." Diameter approximately 0.202 km. from mean, weighted H=21.1.
2012 UA69JPL Sentry2108R E M O V E DJPL: Risk listing removed at 1925 UTC.
NEODyS1505R E M O V E D-
2012 UU68JPL Sentry1505210121.0e-07-6.43-6.650JPL: "Analysis based on 36 observations spanning 5.9559 days (2012-Oct-18.55712 to 2012-Oct-24.513)." Diameter approximately 0.084 km. from mean, weighted H=23.0.
2012 UE34JPL Sentry15052027-21035802.8e-05-3.97-4.760JPL: "Analysis based on 19 observations spanning 6.0469 days (2012-Oct-18.393522 to 2012-Oct-24.44041)." Diameter approximately 0.076 km. from mean, weighted H=23.3.
NEODyS15052027-2100761.05e-05-4.36-5.180NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2012-10-18.394 to 2012-10-24.441."
2012 UZ33JPL Sentry21082015-209871.9e-06-1.53-1.530JPL: "Analysis based on 38 observations spanning 7.0241 days (2012-Oct-17.44832 to 2012-Oct-24.47241)." Diameter approximately 0.569 km. from mean, weighted H=18.9.
NEODyS15052015-209871.66e-06-1.60-1.610NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2012-10-17.449 to 2012-10-24.473."
2002 TX55JPL Sentry0253R E M O V E DJPL: Risk listing removed at 0109 UTC.

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 25 October '12

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

2359Noted that JPL Sentry has posted 2012 UR138 as an impact risk - see above
2137Grabbed MPEC 2012-U102 - 2012 UR138 - see above
2108Noted that JPL Sentry has removed 2012 UA69 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 UZ33 risk assessment - see above
Grabbed MPEC 2012-U98 - P/1960 S1 = 2012 TB36 (Van Houten-Lemmon) - see above
Grabbed MPEC 2012-U99 - 2012 UN138 - see above
Grabbed MPEC 2012-U100 - 2012 UO138 - see above
Grabbed MPEC 2012-U101 - 2012 UQ138 - see above
1736Grabbed MPEC 2012-U96 - 2009 XF2 - see above
Grabbed MPEC 2012-U97 - 2011 DL19 - see above
1705Grabbed MPEC 2012-U95 - Comet P/2012 TB36 (Lemmon) - see above
1507Generated Traffic Report
1505Noted that NEODyS has removed 2012 UA69 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 UE34 risk assessment - see above
Noted that NEODyS has updated its 2012 UE34 risk assessment - see above
Noted that JPL Sentry has updated its 2012 UU68 risk assessment - see above
Noted that NEODyS has updated its 2012 UZ33 risk assessment - see above
Grabbed MPEC 2012-U94 - Daily Orbit Update - see above
0353Grabbed MPEC 2012-U93 - Comet P/2012 U2 (Panstarrs) - see above
0253Noted that JPL Sentry has removed 2002 TX55 as an impact risk - see above