Contents  on 24 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 24 October '12

Three objects reported inside ten LD

There are three asteroids reported inside ten lunar distances (LD) of our planet today. 2012 US18 exits Earth's Hill sphere, passing from 3.80 to 5.90 LD. Out further, 2012 UF34 is outbound from 4.54 to 6.52 LD and 2012 TP231 from 6.48 to 7.37 LD.

Preliminary approach calculations for two newly announced objects have 2012 UX136 arriving inside ten LD on October 27th and 2012 UV136 on November 1st. Additionally, 2012 UW9 arrives on October 27th, risk-listed 2012 UY68 on November 7th, and radar target 2010 JK1 on November 22nd.

This report was updated at 2020 UTC with new discoveries 2012 UX136 (MPEC) and 2012 UV136 (MPEC) plus already departed 2012 UY136 (MPEC). Today's first traffic report was generated at 1550 UTC with follow-up in today's DOU MPEC for departed 2012 UU9 and 2012 UT9 and for distant 68216 2001 CV26.


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 24 October '12

The MPC's NEO Confirmation Page has 50 listings

When last checked today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 58 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 24 October '12

Minor Planet Electronic Circulars

There have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-U92 - "21:47 UT" - 2002 TX55 = 2012 UA69


MPEC 2012-U91 - "21:08 UT" - 1999 VR6 = 2012 UV68


MPEC 2012-U90 - "18:21 UT" - 2012 UY136


MPEC 2012-U89 - "18:18 UT" - 2012 UX136


MPEC 2012-U88 - "18:08 UT" - 2012 UW136


MPEC 2012-U87 - "18:05 UT" - 2012 UV136


MPEC 2012-U86 - "18:00 UT" - 2012 UU136


MPEC 2012-U85 - "17:56 UT" - 2012 UT136


MPEC 2012-U84 - "17:01 UT" - 2012 US136


MPEC 2012-U83 - "16:58 UT" - 2012 UR136


<< DOU on 24 Oct. '12 >>  MPEC 2012-U82 - "06:10 UT" - Daily Orbit Update

Observers  on 24 October '12

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-U84 -- 2012 US136
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2012-U83, 2012-U84, 2012-U86, 2012-U88, 2012-U89 & 2012-U90 -- 2012 UY136, 2012 UX136, 2012 UW136, 2012 UU136, 2012 US136, 2012 UR136
I47Auger Obs. in Argentina, 1 in MPEC 2012-U82 -- 2012 HG31
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-U82 -- 2012 UC69
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-U82 -- 2012 TZ52
300Bisei Spaceguard Center in Japan, 2 in MPECs 2012-U84 & 2012-U90 -- 2012 UY136, 2012 US136
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2012-U82, 2012-U86 & 2012-U90 -- 2012 UY136, 2012 UV9, 2012 UU9, 2012 UU136, 2012 SB22, 2012 RX16, 2012 KK18, 2012 HJ1, 2010 HQ80, 2008 HV4, 2005 JU1
470Ceccano Obs. in Italy, 1 in MPEC 2012-U84 -- 2012 US136
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2012-U82 & 2012-U86 -- 2012 UV9, 2012 UU9, 2012 UU136, 2012 UT9, 2012 TT231, 2012 TO231, 2012 TB259, 2012 TA259, 2012 PQ28, 2012 HY33, 333578, 154278
958Dax Obs. in France, 1 in MPEC 2012-U84 -- 2012 US136
448Desert Moon Obs. in New Mexico, 5 in MPEC 2012-U82 -- 2012 SZ49, 331792, 326291, 159635, 159533
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U83 -- 2012 UR136
B86Hagen Obs. in Germany, 1 in MPEC 2012-U84 -- 2012 US136
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2012-U84 -- 2012 US136
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-U84 -- 2012 US136
046Klet Obs. in the Czech Republic, 1 in MPEC 2012-U84 -- 2012 US136
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2012-U82 -- 2012 RV16
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2012-U82 & 2012-U83 -- 2012 UR136, 2012 TF79, 2001 QJ142
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-U82 -- 2012 RV16
118Modra Obs. in Slovakia, 2 in MPECs 2012-U82 & 2012-U84 -- 2012 US136, 2012 QF49
900Moriyama Obs. in Japan, 1 in MPEC 2012-U84 -- 2012 US136
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-U82, 2012-U84, 2012-U85, 2012-U86 & 2012-U87 -- 2012 UV136, 2012 UU136, 2012 UT136, 2012 US136, 2010 VN65, 2004 XH29, 138815
A24New Millennium Obs. in Italy, 10 in MPEC 2012-U82 -- 2012 QB17, 2012 JS11, 333358, 250458, 219071, 162911, 141851, 12538, 105140, 4947
583Odessa-Mayaki Obs. in the Ukraine, 2 in MPEC 2012-U82 -- 214869, 136993
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2012-U82, 2012-U83 & 2012-U88 -- 2012 UW136, 2012 UV27, 2012 UR136, 2012 TT145, 2006 KZ37, 2003 UC20, 2000 RD53, 153958, 141851, 137199
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U84 -- 2012 US136
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-U84 & 2012-U86 -- 2012 UU136, 2012 US136
204Schiaparelli Obs. in Italy, 5 in MPECs 2012-U83, 2012-U84, 2012-U85, 2012-U86 & 2012-U90 -- 2012 UY136, 2012 UU136, 2012 UT136, 2012 US136, 2012 UR136
E12Siding Spring Survey (SSS) in New South Wales, 24 in MPECs 2012-U82 & 2012-U89 -- 2012 UX136, 2012 UV9, 2012 TB259, 2012 SK8, 2012 SD22, 2012 RL2, 2012 QP17, 2012 QJ45, 2012 QF49, 2012 PG5, 2012 KM45, 2012 HG31, 2012 FM52, 2012 BC20, 2010 ED43, 2009 DK46, 2002 TR190, 87684, 68216, 335746, 322652, 16816, 112985, 6455
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-U82 -- 2012 TX284, 190161
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2012-U82, 2012-U83, 2012-U84, 2012-U85, 2012-U86, 2012-U88 & 2012-U90 -- 2012 UZ33, 2012 UY136, 2012 UW136, 2012 UU136, 2012 UT136, 2012 US136, 2012 UR136, 2012 TX284, 2012 TT78, 2012 TO20, 2012 TH146, 2012 TG146, 2007 YQ56, 2005 AY28
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-U84 -- 2012 US136
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-U82 -- 330825
926Tenagra II Obs. in Arizona, 2 in MPEC 2012-U82 -- 2012 TQ78, 225416
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 UR136JPL Sentry18582036-204427.5e-10-6.07-6.280JPL: "Analysis based on 21 observations spanning 3.8763 days (2012-Oct-20.42467 to 2012-Oct-24.301012)." Diameter approximately 0.560 km. from mean, weighted H=18.9.
2012 UA69NEODyS15462021-2097623.77e-06-4.88-5.760NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2012-10-22.333 to 2012-10-23.163."
2012 UZ33JPL Sentry15462015-209862.2e-06-1.45-1.470JPL: "Analysis based on 36 observations spanning 5.9153 days (2012-Oct-17.44832 to 2012-Oct-23.36358)." Diameter approximately 0.580 km. from mean, weighted H=18.8.
NEODyS15462015-209881.95e-06-1.52-1.530NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2012-10-17.449 to 2012-10-23.364."

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 24 October '12

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

2201Grabbed MPEC 2012-U91 - 1999 VR6 = 2012 UV68 - see above
Grabbed MPEC 2012-U92 - 2002 TX55 = 2012 UA69 - see above
2020Updated Traffic Report
1858Noted that JPL Sentry has posted 2012 UR136 as an impact risk - see above
1838Grabbed MPEC 2012-U85 - 2012 UT136 - see above
Grabbed MPEC 2012-U86 - 2012 UU136 - see above
Grabbed MPEC 2012-U87 - 2012 UV136 - see above
Grabbed MPEC 2012-U88 - 2012 UW136 - see above
Grabbed MPEC 2012-U89 - 2012 UX136 - see above
Grabbed MPEC 2012-U90 - 2012 UY136 - see above
1708Grabbed MPEC 2012-U83 - 2012 UR136 - see above
Grabbed MPEC 2012-U84 - 2012 US136 - see above
1546Noted that NEODyS has posted 2012 UA69 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 UZ33 risk assessment - see above
Noted that NEODyS has updated its 2012 UZ33 risk assessment - see above
Grabbed MPEC 2012-U82 - Daily Orbit Update - see above