Contents  on 23 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 23 October '12

Three objects reported inside ten LD

Three visitors are reported moving within ten lunar distances (LD) of our planet today. Inside Earth's Hill sphere, 2012 US18 is outbound from 2.02 to 3.80 LD and 2012 UF34 exits the sphere, passing from 3.07 to 4.54 LD. Further away, 2012 TP231 is outbound from 5.92 to 6.48 LD.

Approaching our neighborhood next, 2012 UW9 arrives inside ten LD on October 27th, newly announced and risk-listed 2012 UY68 arrives on November 7th, and radar target 2010 JK1 on November 22nd.

This report was generated at 1951 UTC with new discovery 2012 UY68 (MPEC) and follow-up in today's DOU MPEC for departed risk-listed 2012 TU231.


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 23 October '12

The MPC's NEO Confirmation Page has 48 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, 28 were "one nighters." So far The Tracking News has counted a total of 82 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 23 October '12

Minor Planet Electronic Circulars

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


MPEC 2012-U81 - "21:56 UT" - 2012 UT68


MPEC 2012-U80 - "16:49 UT" - 2012 UC69


MPEC 2012-U79 - "16:47 UT" - 2012 UB69


MPEC 2012-U78 - "16:44 UT" - 2012 UA69


MPEC 2012-U77 - "16:41 UT" - 2012 UZ68


MPEC 2012-U76 - "16:38 UT" - 2012 UY68


MPEC 2012-U75 - "16:35 UT" - 2012 UX68


MPEC 2012-U74 - "16:28 UT" - 2012 UW68


MPEC 2012-U73 - "16:25 UT" - 2012 UV68


MPEC 2012-U72 - "16:22 UT" - 2012 UU68


MPEC 2012-U71 - "16:20 UT" - 2012 UT68


MPEC 2012-U70 - "16:16 UT" - 2012 US68


MPEC 2012-U69 - "10:37 UT" - 2009 UQ5


<< DOU on 23 Oct. '12 >>  MPEC 2012-U68 - "06:08 UT" - Daily Orbit Update

Observers  on 23 October '12

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2012-U70 & 2012-U73 -- 2012 UV68, 2012 US68
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-U68 -- 12538
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-U80 -- 2012 UC69
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2012-U68, 2012-U77, 2012-U78 & 2012-U80 -- 2012 UZ68, 2012 UC69, 2012 UA69, 2012 TK123, 2007 TF68, 2007 RT19, 1998 SE36, 277127, 10302, 5646
470Ceccano Obs. in Italy, 1 in MPEC 2012-U80 -- 2012 UC69
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-U76 -- 2012 UY68
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2012-U68 & 2012-U80 -- 2012 UC69, 2012 QF49
822Cordoba Obs. in Argentina, 1 in MPEC 2012-U80 -- 2012 UC69
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U71 -- 2012 UT68
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-U75 -- 2012 UX68
157Frasso Sabino Obs. in Italy, 2 in MPEC 2012-U68 -- 2012 TQ139, 2012 SQ56
J95Great Shefford Obs. in England, 2 in MPECs 2012-U71 & 2012-U73 -- 2012 UV68, 2012 UT68
B86Hagen Obs. in Germany, 1 in MPEC 2012-U68 -- 2007 TF68
046Klet Obs. in the Czech Republic, 1 in MPEC 2012-U68 -- 2012 RV16
704LINEAR in New Mexico, 1 in MPEC 2012-U68 -- 2012 UX27
C01Lohrmann Obs. in Germany, 1 in MPEC 2012-U68 -- 6047
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2012-U70, 2012-U72 & 2012-U75 -- 2012 UX68, 2012 UU68, 2012 US68
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-U72 -- 2012 UU68
711McDonald Obs. in Texas, 2 in MPECs 2012-U71 & 2012-U79 -- 2012 UT68, 2012 UB69
474Mt. John Obs. in New Zealand, 4 in MPEC 2012-U68 -- 2012 TS, 2012 ST9, 2012 SD22, 2012 HC34
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2012-U68, 2012-U71, 2012-U73, 2012-U74, 2012-U76, 2012-U77 & 2012-U81 -- 2012 UZ68, 2012 UY68, 2012 UW68, 2012 UV68, 2012 UT68, 2012 TL20, 2012 TG53, 2012 TF53, 2009 TB3, 2007 HZ, 1999 TK12, 138893
F51Pan-STARRS 1 (PS1) in Hawaii, 21 in MPECs 2012-U68, 2012-U69, 2012-U70, 2012-U71, 2012-U72, 2012-U73, 2012-U74, 2012-U75 & 2012-U79 -- 2012 UX68, 2012 UW68, 2012 UV68, 2012 UU68, 2012 UT68, 2012 US68, 2012 UL, 2012 UB69, 2012 TX284, 2012 TF53, 2012 SZ49, 2012 SF51, 2009 UQ5, 2007 RT19, 2006 XA, 2006 WN1, 2005 VT5, 2004 TL19, 1998 SE36, 207970, 163364
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-U80 -- 2012 UC69
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-U68 & 2012-U73 -- 2012 UV68, 2007 TF68
204Schiaparelli Obs. in Italy, 7 in MPECs 2012-U70, 2012-U71, 2012-U72, 2012-U73, 2012-U77, 2012-U78 & 2012-U80 -- 2012 UZ68, 2012 UV68, 2012 UU68, 2012 UT68, 2012 US68, 2012 UC69, 2012 UA69
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-U80 -- 2012 UC69
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2012-U68, 2012-U71, 2012-U73 & 2012-U81 -- 2012 UV68, 2012 UT68, 2007 HZ, 96189, 190119, 163364, 153306
291Spacewatch 1.8m telescope in Arizona, 23 in MPECs 2012-U68, 2012-U69, 2012-U70, 2012-U71, 2012-U72, 2012-U73, 2012-U74, 2012-U75, 2012-U76, 2012-U77, 2012-U78 & 2012-U79 -- 2012 UZ68, 2012 UZ33, 2012 UY68, 2012 UX68, 2012 UX27, 2012 UW68, 2012 UV68, 2012 UU68, 2012 UT68, 2012 US68, 2012 UE34, 2012 UB69, 2012 UA69, 2012 TY52, 2012 TX284, 2012 TV78, 2012 TU231, 2012 TT5, 2012 TP139, 2012 TF53, 2009 UQ5, 2009 SN98, 2007 TF68
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-U77 -- 2012 UZ68
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2012-U68 -- 2012 TY79, 329338, 163732, 162911
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 UA69JPL Sentry19342016-21124076.8e-06-4.56-5.540JPL: "Analysis based on 12 observations spanning .83001 days (2012-Oct-22.33267 to 2012-Oct-23.16268)." Diameter approximately 0.059 km. from mean, weighted H=23.8.
2012 UY68JPL Sentry19052102-211136.9e-10-9.68-10.00JPL: "Analysis based on 19 observations spanning 2.9318 days (2012-Oct-20.30946 to 2012-Oct-23.2413)." Diameter approximately 0.033 km. from mean, weighted H=25.1.
2012 UU68JPL Sentry1757210111.4e-07-6.33-6.330JPL: "Analysis based on 30 observations spanning 4.8797 days (2012-Oct-18.55712 to 2012-Oct-23.43678)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
2012 UE34JPL Sentry17092020-20975063.1e-05-3.82-4.750JPL: "Analysis based on 17 observations spanning 4.8124 days (2012-Oct-18.393522 to 2012-Oct-23.20588)." Diameter approximately 0.071 km. from mean, weighted H=23.4.
NEODyS17092020-21001673.01e-05-3.77-4.710NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-10-18.394 to 2012-10-23.207."
2012 TU231JPL Sentry1709211112.6e-07-7.52-7.520JPL: "Analysis based on 31 observations spanning 7.2535 days (2012-Oct-15.19373 to 2012-Oct-22.44718)." Diameter approximately 0.019 km. from mean, weighted H=26.2.
2012 TP20JPL Sentry1709207913.2e-07-8.11-8.110JPL: "Analysis based on 26 observations spanning 8.0991 days (2012-Oct-08.19843 to 2012-Oct-16.297488)." Diameter approximately 0.009 km. from mean, weighted H=27.8.

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 23 October '12

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

2205Grabbed MPEC 2012-U81 - 2012 UT68 - see above
1951Generated Traffic Report
1934Noted that JPL Sentry has posted 2012 UA69 as an impact risk - see above
1905Noted that JPL Sentry has posted 2012 UY68 as an impact risk - see above
1757Noted that JPL Sentry has posted 2012 UU68 as an impact risk - see above
1709Noted that JPL Sentry has updated its 2012 TP20 risk assessment - see above
Noted that JPL Sentry has updated its 2012 TU231 risk assessment - 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
Grabbed MPEC 2012-U68 - Daily Orbit Update - see above
Grabbed MPEC 2012-U69 - 2009 UQ5 - see above
Grabbed MPEC 2012-U70 - 2012 US68 - see above
Grabbed MPEC 2012-U71 - 2012 UT68 - see above
Grabbed MPEC 2012-U72 - 2012 UU68 - see above
Grabbed MPEC 2012-U73 - 2012 UV68 - see above
Grabbed MPEC 2012-U74 - 2012 UW68 - see above
Grabbed MPEC 2012-U75 - 2012 UX68 - see above
Grabbed MPEC 2012-U76 - 2012 UY68 - see above
Grabbed MPEC 2012-U77 - 2012 UZ68 - see above
Grabbed MPEC 2012-U78 - 2012 UA69 - see above
Grabbed MPEC 2012-U79 - 2012 UB69 - see above
Grabbed MPEC 2012-U80 - 2012 UC69 - see above