Contents  on 28 October '08

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 28 October '08

The MPC's NEO Confirmation Page has 9 listings: 9 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had nine updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 20 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 28 October '08

Minor Planet Electronic Circulars

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


MPEC 2008-U80 - "12:36 UT" - 2008 UO90


MPEC 2008-U79 - "12:33 UT" - 2008 UN90


MPEC 2008-U78 - "12:30 UT" - 2008 UM90


MPEC 2008-U77 - "12:27 UT" - 2008 UL90


<< DOU on 28 Oct. '08 >>  MPEC 2008-U76 - "06:14 UT" - Daily Orbit Update


MPEC 2008-U75 - "04:53 UT" - 2008 CH1

Observers  on 28 October '08

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 12 in MPEC 2008-U76 -- 2008 SQ1, 2008 SP7, 2008 SN1, 2008 SE, 2005 WS55, 2005 TZ51, 2005 OU1, 2001 SG10, 188452, 16960, 144901, 105140
300Bisei Spaceguard Center in Japan, 1 in MPEC 2008-U79 -- 2008 UN90
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-U76 & 2008-U79 -- 2008 UN90, 2008 TX3, 2008 SQ, 2003 GW, 2002 SS41, 2000 FL1, 189062, 18882, 142348, 108906
294College of Staten Island Obs., 4 in MPEC 2008-U76 -- 2008 SQ, 2008 SE, 2005 TZ51, 2001 TW1
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-U79 -- 2008 UN90
B23Fiamene Obs. in Italy, 1 in MPEC 2008-U76 -- 2008 SQ
J95Great Shefford Obs. in England, 4 in MPECs 2008-U76, 2008-U77, 2008-U79 & 2008-U80 -- 2008 UO90, 2008 UN90, 2008 UL90, 2008 UC7
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2008-U76 -- 2008 US4, 2008 SQ1, 2008 SE, 2005 TZ51, 2001 UY4
585Kiev Comet Station in the Ukraine, 1 in MPEC 2008-U76 -- 1620
704LINEAR in New Mexico, 17 in MPEC 2008-U76 -- 2008 US4, 2008 SE, 2008 RG98, 2005 LR3, 2004 TU11, 2004 TL19, 1996 TE9, 90075, 87024, 39572, 16834, 155140, 153306, 12538, 11500, 4183, 2201
304Las Campanas Obs. in Chile, 1 in MPEC 2008-U76 -- 2008 MB5
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2008-U77, 2008-U78, 2008-U79 & 2008-U80 -- 2008 UO90, 2008 UN90, 2008 UM90, 2008 UL90
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2008-U75 & 2008-U76 -- 2008 TP26, 2008 ST7, 2008 CH1
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-U76, 2008-U77 & 2008-U78 -- 2008 UM90, 2008 UL90, 2008 UD1, 2008 UC7, 2008 TY9, 2008 TB27, 2006 UP, 2006 GW2, 2005 BE2, 162825
H36Sandlot Obs. in Kansas, 4 in MPEC 2008-U76 -- 2008 UU, 2008 UN3, 2008 TV26, 2008 TQ2
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-U76 -- 2001 KO20, 68031
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2008-U76 & 2008-U80 -- 2008 US2, 2008 UO90, 2008 TA1, 2008 RX24, 2003 SG170, 6178
291Spacewatch 1.8m telescope in Arizona, 21 in MPECs 2008-U76, 2008-U78, 2008-U79 & 2008-U80 -- 2008 UW5, 2008 UV5, 2008 UU, 2008 UT5, 2008 US2, 2008 UR2, 2008 UO90, 2008 UN90, 2008 UN3, 2008 UM90, 2008 UL3, 2008 UF, 2008 UD1, 2008 UB7, 2008 TQ10, 2008 TE4, 2008 TC2, 2008 TA1, 2008 RH1, 2005 SN25, 185851
A78Stia Obs. in Italy, 3 in MPEC 2008-U76 -- 2008 TF4, 2008 SQ1, 2008 SP7
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-U79 -- 2008 UN90
G56Walnut Creek Obs., 2 in MPEC 2008-U76 -- 137032, 1620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 October '08

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 UB7NEODyS19012044-2088453.91e-05-3.68-4.020NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2008/10/26.260 to 2008/10/28.177."
JPL Sentry12582044-2100474.4e-05-3.64-4.000JPL: "Analysis based on 31 observations spanning 1.9172 days (2008-Oct-26.25877 to 2008-Oct-28.17595)." Diameter approximately 0.059 km. from mean, weighted H=23.8.
2008 UW5NEODyS1259205011.19e-11-7.27-7.270NEODyS: "Based on 20 optical observations (of which 1 are rejected as outliers) from 2008/10/25.825 to 2008/10/27.297."
JPL Sentry1258R E M O V E DJPL: Risk listing removed at 0856 UTC.
2008 UV5NEODyS1259207012.59e-11-11.24-11.240NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/10/25.359 to 2008/10/27.279."
JPL Sentry1258203911.6e-10-10.00-10.00JPL: "Analysis based on 16 observations spanning 1.9193 days (2008-Oct-25.35859 to 2008-Oct-27.2779)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2008 UT5JPL Sentry1258R E M O V E DJPL: Risk listing removed at 0930 UTC.
NEODyS1258R E M O V E D-
2008 UD1JPL Sentry1258R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1258R E M O V E D-
2008 TP26JPL Sentry1258R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1258R E M O V E D-
2008 ST7NEODyS12592073-208952.12e-07-6.42-6.520NEODyS: "Based on 113 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/26.429."
JPL Sentry12582074-2105195.2e-05-4.19-4.580JPL: "Analysis based on 107 observations spanning 32.129 days (2008-Sep-24.29993 to 2008-Oct-26.42862)." Diameter approximately 0.051 km. from mean, weighted H=24.1.

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 28 October '08

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

1901Noted that NEODyS has posted 2008 UB7 as an impact risk - see above
1259Noted that NEODyS has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 UV5 risk assessment - see above
Noted that NEODyS has updated its 2008 UW5 risk assessment - see above
Grabbed MPEC 2008-U75 - 2008 CH1 - see above
Grabbed MPEC 2008-U76 - Daily Orbit Update - see above
Grabbed MPEC 2008-U77 - 2008 UL90 - see above
Grabbed MPEC 2008-U78 - 2008 UM90 - see above
Grabbed MPEC 2008-U79 - 2008 UN90 - see above
Grabbed MPEC 2008-U80 - 2008 UO90 - see above
1258Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above
Noted that JPL Sentry has removed 2008 TP26 as an impact risk - see above
Noted that NEODyS has removed 2008 TP26 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 UB7 risk assessment - see above
Noted that JPL Sentry has removed 2008 UD1 as an impact risk - see above
Noted that NEODyS has removed 2008 UD1 as an impact risk - see above
Noted that JPL Sentry has removed 2008 UT5 as an impact risk - see above
Noted that NEODyS has removed 2008 UT5 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 UV5 risk assessment - see above
Noted that JPL Sentry has removed 2008 UW5 as an impact risk - see above