Contents  on 27 October '09

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.

NEOCP Activity  on 27 October '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eighteen listings on the NEOCP at some point 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 27 October '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been eighteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-U123 - "23:30 UT" - 2009 UG89


MPEC 2009-U122 - "20:48 UT" - 2009 UZ87


MPEC 2009-U121 - "20:43 UT" - 2009 UY87


MPEC 2009-U120 - "20:39 UT" - 2009 UX87


MPEC 2009-U119 - "20:33 UT" - 2009 UW87


MPEC 2009-U118 - "20:26 UT" - 2009 UV87


MPEC 2009-U117 - "20:06 UT" - 2009 UU87


MPEC 2009-U116 - "20:01 UT" - 2009 UT87


MPEC 2009-U115 - "19:54 UT" - 2009 US87


MPEC 2009-U114 - "17:09 UT" - 2008 QB43


MPEC 2009-U113 - "17:01 UT" - 2008 AP129


<< DOU on 27 Oct. '09 >>  MPEC 2009-U112 - "06:10 UT" - Daily Orbit Update


MPEC 2009-U111 - "03:52 UT" - 2008 SP266


MPEC 2009-U110 - "03:46 UT" - 2008 QY40


MPEC 2009-U109 - "03:40 UT" - 2008 NW4


MPEC 2009-U108 - "01:17 UT" - 2009 UK28


MPEC 2009-U107 - "01:12 UT" - 2009 UM28


MPEC 2009-U106 - "01:09 UT" - 2009 UL28

Observers  on 27 October '09

A total of 32 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 9 in MPEC 2009-U112 -- 2009 UK14, 2009 UG, 2009 UF, 2009 UA19, 2009 TN8, 2009 TK8, 2009 TF10, 2009 SV171, 2009 RN
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-U112 -- 2005 RQ6
160Castelmartini Obs. in Italy, 17 in MPEC 2009-U112 -- 2009 TK8, 2009 TK12, 2009 TA1, 2009 SV171, 2009 RN, 2005 RQ6, 1999 HY1, 85818, 38091, 218017, 217683, 20790, 185716, 162998, 154244, 136617, 5587
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-U112, 2009-U120, 2009-U121 & 2009-U122 -- 2009 UZ87, 2009 UY87, 2009 UX87, 2009 UW18, 218017, 20790, 152931, 6239
G58Chabot Obs. in northern California, 3 in MPEC 2009-U112 -- 2009 UQ5, 2009 UJ14, 2009 UA
850Cordell-Lorenz Obs. in Tennessee, 5 in MPEC 2009-U112 -- 2009 UV18, 2009 SV171, 1999 HY1, 217683, 185716
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-U108 -- 2009 UK28
355Hadano Obs. in Japan, 8 in MPEC 2009-U112 -- 2009 NH, 2009 NE, 2009 MC9, 2007 LL, 2002 LV, 17274, 163697, 433
704LINEAR in New Mexico, 8 in MPEC 2009-U112 -- 2009 UH14, 2009 UC19, 99907, 87311, 85818, 38091, 217683, 5131
J75La Sagra Obs. in Spain, 3 in MPECs 2009-U108 & 2009-U112 -- 2009 UV18, 2009 UK28, 2009 TK8
B33Libbiano Obs. in Italy, 3 in MPECs 2009-U106, 2009-U107 & 2009-U108 -- 2009 UM28, 2009 UL28, 2009 UK28
688Lowell Obs. Anderson Mesa Station in Arizona, 3 in MPECs 2009-U109, 2009-U110 & 2009-U111 -- 2008 SP266, 2008 QY40, 2008 NW4
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2009-U112 -- 2009 UO3, 2009 TK12, 2009 ML1, 2009 KC3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2009-U106, 2009-U107, 2009-U115, 2009-U116, 2009-U117, 2009-U118, 2009-U119, 2009-U120, 2009-U121, 2009-U122 & 2009-U123 -- 2009 UZ87, 2009 UY87, 2009 UX87, 2009 UW87, 2009 UV87, 2009 UU87, 2009 UT87, 2009 US87, 2009 UM28, 2009 UL28, 2009 UG89
900Moriyama Obs. in Japan, 1 in MPEC 2009-U121 -- 2009 UY87
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2009-U107, 2009-U112, 2009-U115, 2009-U116, 2009-U117, 2009-U118, 2009-U119, 2009-U122 & 2009-U123 -- 2009 UZ87, 2009 UW87, 2009 UV87, 2009 UU87, 2009 UT87, 2009 US87, 2009 UM28, 2009 UG89, 2009 TF10, 38091, 183548, 155340, 140158, 3361
675Mt. Palomar in southern California, 5 in MPECs 2009-U109, 2009-U110, 2009-U111, 2009-U113 & 2009-U114 -- 2008 SP266, 2008 QY40, 2008 QB43, 2008 NW4, 2008 AP129
J47Nazaret Obs. in Spain, 1 in MPEC 2009-U112 -- 152575
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2009-U112 -- 2009 TK8, 2009 SG2, 2009 MC9, 2005 RQ6
D29Purple Mtn. Obs. Xuyi Station (Xuyi Sta.) in China, 5 in MPEC 2009-U112 -- 38091, 217683, 16816, 136617, 3288
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-U107 -- 2009 UM28
473Remanzacco Obs. in Italy, 1 in MPEC 2009-U107 -- 2009 UM28
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-U106, 2009-U107 & 2009-U120 -- 2009 UX87, 2009 UM28, 2009 UL28
H36Sandlot Obs. in Kansas, 2 in MPECs 2009-U117 & 2009-U123 -- 2009 UU87, 2009 UG89
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-U112 -- 2009 TK8
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-U107 -- 2009 UM28
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-U112 -- 2009 TN8, 2008 WB59, 87684, 42286, 220124, 211871
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2009-U114 -- 2008 QB43
587Sormano Obs. in Italy, 2 in MPECs 2009-U107 & 2009-U108 -- 2009 UM28, 2009 UK28
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2009-U106, 2009-U112 & 2009-U115 -- 2009 US87, 2009 UL28, 2002 UN3, 4486
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-U106, 2009-U112, 2009-U115 & 2009-U123 -- 2009 UW18, 2009 UV18, 2009 UT19, 2009 US87, 2009 UL28, 2009 UL20, 2009 UK20, 2009 UK, 2009 UG89, 2009 UF2, 2009 UD2, 2009 SS104, 2008 UB95, 2006 VG13, 2000 AX93
926Tenagra II Obs. in Arizona, 2 in MPECs 2009-U117 & 2009-U120 -- 2009 UX87, 2009 UU87
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 October '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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
2009 UY87JPL Sentry23102020-2100221.8e-08-4.60-5.010JPL: "Analysis based on 18 observations spanning .29206 days (2009-Oct-27.40843 to 2009-Oct-27.70049)." Diameter approximately 0.488 km. from mean, weighted H=19.2.
2009 UV87JPL Sentry23102029-2100202.3e-08-7.36-7.990JPL: "Analysis based on 16 observations spanning .17970 days (2009-Oct-27.18486 to 2009-Oct-27.36456)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2009 UL20JPL Sentry1323R E M O V E DJPL: Risk listing removed at 0850 UTC.
2009 UV18JPL Sentry1323R E M O V E DJPL: Risk listing removed at 0847 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 27 October '09

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

2358Grabbed MPEC 2009-U123 - 2009 UG89 - see above
2310Noted that JPL Sentry has posted 2009 UV87 as an impact risk - see above
Noted that JPL Sentry has posted 2009 UY87 as an impact risk - see above
Grabbed MPEC 2009-U115 - 2009 US87 - see above
Grabbed MPEC 2009-U116 - 2009 UT87 - see above
Grabbed MPEC 2009-U117 - 2009 UU87 - see above
Grabbed MPEC 2009-U118 - 2009 UV87 - see above
Grabbed MPEC 2009-U119 - 2009 UW87 - see above
Grabbed MPEC 2009-U120 - 2009 UX87 - see above
Grabbed MPEC 2009-U121 - 2009 UY87 - see above
Grabbed MPEC 2009-U122 - 2009 UZ87 - see above
1806Grabbed MPEC 2009-U113 - 2008 AP129 - see above
Grabbed MPEC 2009-U114 - 2008 QB43 - see above
1323Noted that JPL Sentry has removed 2009 UL20 as an impact risk - see above
Noted that JPL Sentry has removed 2009 UV18 as an impact risk - see above
Grabbed MPEC 2009-U112 - Daily Orbit Update - see above
0405Grabbed MPEC 2009-U106 - 2009 UL28 - see above
Grabbed MPEC 2009-U107 - 2009 UM28 - see above
Grabbed MPEC 2009-U108 - 2009 UK28 - see above
Grabbed MPEC 2009-U109 - 2008 NW4 - see above
Grabbed MPEC 2009-U110 - 2008 QY40 - see above
Grabbed MPEC 2009-U111 - 2008 SP266 - see above