Contents  on 25 October '11

Note: These A/CC news pages will update more irregularly and less frequently than usual through Sunday, October 30th.

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NEOCP Activity  on 25 October '11

The MPC's NEO Confirmation Page has 31 listings

When last checked at 1740 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, eight were "one nighters." The Tracking News counted a total of 55 listings on the NEOCP on this day.

New MPECs  on 25 October '11

Minor Planet Electronic Circulars

There were eleven MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-U80 - "23:45 UT" - 2011 UB131


MPEC 2011-U79 - "23:43 UT" - 2011 UA131


MPEC 2011-U78 - "16:35 UT" - 2011 UD115


MPEC 2011-U77 - "16:33 UT" - 2011 UB115


MPEC 2011-U76 - "16:31 UT" - 2011 UA115


MPEC 2011-U75 - "16:27 UT" - 2011 UZ114


MPEC 2011-U74 - "16:18 UT" - 2011 UY114


MPEC 2011-U73 - "16:16 UT" - 2011 UX114


MPEC 2011-U72 - "16:14 UT" - 2011 UW114


MPEC 2011-U71 - "16:11 UT" - 2011 UV114


<< DOU on 25 Oct. '11 >>  MPEC 2011-U70 - "06:03 UT" - Daily Orbit Update

Observers  on 25 October '11

A total of 20 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2011-U70, 2011-U72, 2011-U73, 2011-U74, 2011-U75, 2011-U78, 2011-U79 & 2011-U80 -- 2011 UZ114, 2011 UY114, 2011 UX114, 2011 UW114, 2011 UN20, 2011 UK10, 2011 UE21, 2011 UD115, 2011 UC64, 2011 UB64, 2011 UB131, 2011 UA131, 2011 MK, 2007 XJ20, 20236
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-U78 -- 2011 UD115
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-U80 -- 2011 UB131
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2011-U70, 2011-U78 & 2011-U80 -- 2011 UD115, 2011 UD, 2011 UB131, 2011 TG2, 2011 OV4, 2006 SQ78, 2004 QB17, 87311, 39572, 285625, 283460, 283457, 276274, 16834, 162980, 155140, 7341
448Desert Moon Obs. in New Mexico, 6 in MPEC 2011-U70 -- 2011 UD, 2011 TN9, 2011 TG2, 2011 TA4, 2011 SU68, 2011 SU232
I70Edney House Obs., 1 in MPEC 2011-U70 -- 297418
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-U79 -- 2011 UA131
E10Faulkes Telescope South in New South Wales, 3 in MPECs 2011-U74, 2011-U75 & 2011-U76 -- 2011 UZ114, 2011 UY114, 2011 UA115
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-U70 -- 2011 TN9
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-U70 -- 96744
704LINEAR in New Mexico, 4 in MPEC 2011-U70 -- 2004 QB17, 2004 FH11, 283457, 5653
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2011-U71, 2011-U72, 2011-U73, 2011-U74, 2011-U75 & 2011-U79 -- 2011 UZ114, 2011 UY114, 2011 UX114, 2011 UW114, 2011 UV114, 2011 UA131
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-U79 -- 2011 UA131
932McCarthy Obs. in Connecticut, 1 in MPEC 2011-U70 -- 2011 UP63
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2011-U70, 2011-U71, 2011-U74, 2011-U75, 2011-U76, 2011-U77, 2011-U78 & 2011-U80 -- 2011 UZ114, 2011 UY114, 2011 UV114, 2011 UD115, 2011 UB131, 2011 UB115, 2011 UA115, 2011 SU232, 42286, 274855, 232382, 140039, 137799
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2011-U70, 2011-U72, 2011-U73 & 2011-U79 -- 2011 UX114, 2011 UW114, 2011 UT91, 2011 UH21, 2011 UA131, 2011 SO25, 2011 PT1, 2001 UE5, 285179, 2212, 1943
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2011-U70 & 2011-U72 -- 2011 UW114, 2011 UN20, 52768, 18736
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2011-U70, 2011-U72, 2011-U73 & 2011-U76 -- 2011 UX114, 2011 UW114, 2011 UT, 2011 UQ20, 2011 UN20, 2011 UL21, 2011 UA115, 2011 UA, 2011 SV71, 2011 SD173
B18Terskol Obs. in Russia, 2 in MPECs 2011-U70 & 2011-U78 -- 2011 UD115, 283457
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2011-U70 -- 2201
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 October '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1740 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
2011 UC64JPL Sentry13222093-2110157.4e-06-6.71-7.010JPL: "Analysis based on 48 observations spanning 1.7613 days (2011-Oct-22.324 to 2011-Oct-24.085335)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2011 UL21JPL Sentry16492026-2109567.7e-07-1.10-1.920JPL: "Analysis based on 57 observations spanning 7.0338 days (2011-Oct-17.48272 to 2011-Oct-24.51657)." Diameter approximately 2.600 km. from mean, weighted H=15.6.
NEODyS13222026-2090498.53e-07-1.03-1.690NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2011-10-17.483 to 2011-10-24.517."
2011 UTJPL Sentry13222034-210984.8e-06-5.75-6.270JPL: "Analysis based on 61 observations spanning 7.0914 days (2011-Oct-17.41107 to 2011-Oct-24.50243)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
NEODyS13222034-204921.21e-06-6.07-6.330NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2011-10-17.412 to 2011-10-24.503."
2011 SD173JPL Sentry13222062-208153.1e-08-4.86-4.910JPL: "Analysis based on 47 observations spanning 30.084 days (2011-Sep-24.42522 to 2011-Oct-24.50949)." Diameter approximately 0.420 km. from mean, weighted H=19.5.
NEODyS13222075-209061.1e-08-5.47-5.840NEODyS: "Based on 48 optical observations (of which 1 are rejected as outliers) from 2011-09-24.426 to 2011-10-24.510."

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 '11

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

0103 10/26Grabbed MPEC 2011-U79 - 2011 UA131 - see above
Grabbed MPEC 2011-U80 - 2011 UB131 - see above
1649Noted that JPL Sentry has updated its 2011 UL21 risk assessment - see above
Grabbed MPEC 2011-U71 - 2011 UV114 - see above
Grabbed MPEC 2011-U72 - 2011 UW114 - see above
Grabbed MPEC 2011-U73 - 2011 UX114 - see above
Grabbed MPEC 2011-U74 - 2011 UY114 - see above
Grabbed MPEC 2011-U75 - 2011 UZ114 - see above
Grabbed MPEC 2011-U76 - 2011 UA115 - see above
Grabbed MPEC 2011-U77 - 2011 UB115 - see above
Grabbed MPEC 2011-U78 - 2011 UD115 - see above
1322Noted that JPL Sentry has updated its 2011 SD173 risk assessment - see above
Noted that NEODyS has updated its 2011 SD173 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UC64 risk assessment - see above
Noted that NEODyS has updated its 2011 UL21 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UT risk assessment - see above
Noted that NEODyS has updated its 2011 UT risk assessment - see above
Grabbed MPEC 2011-U70 - Daily Orbit Update - see above