Contents  on 23 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 23 October '09

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of thirteen 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 23 October '09

Minor Planet Electronic Circulars

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


MPEC 2009-U72 - "17:13 UT" - 2009 UZ17


MPEC 2009-U71 - "17:05 UT" - 2009 UY17


MPEC 2009-U70 - "16:56 UT" - 2009 UX17


<< DOU on 23 Oct. '09 >>  MPEC 2009-U69 - "06:12 UT" - Daily Orbit Update


MPEC 2009-U68 - "02:52 UT" - 2009 HW77

Observers  on 23 October '09

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
069Baldone Obs. in Latvia, 1 in MPEC 2009-U68 -- 2009 HW77
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 TL4, 2009 RD1
B84Cyclops Obs. in The Netherlands, 2 in MPEC 2009-U69 -- 2009 KC3, 3200
A27Eridanus Obs. in Germany, 1 in MPEC 2009-U69 -- 159402
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UK14
E10Faulkes Telescope South in New South Wales, 2 in MPECs 2009-U71 & 2009-U72 -- 2009 UZ17, 2009 UY17
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-U69 -- 164121
J95Great Shefford Obs. in England, 4 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UU1, 2009 UK14, 2009 UJ
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-U72 -- 2009 UZ17
A17Guidestar Obs. in Germany, 2 in MPEC 2009-U69 -- 2009 TL8, 54660
C05Konigsleiten Obs. in Austria, 4 in MPEC 2009-U69 -- 2009 TK12, 162998, 136617, 3361
704LINEAR in New Mexico, 4 in MPEC 2009-U69 -- 2009 UM3, 35396, 218017, 3361
J131program code 1 via the Liverpool Telescope in the Canary Islands, 1 in MPEC 2009-U69 -- 2009 TA1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-U69 -- 2009 TU
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-U68, 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UO1, 2009 HW77, 2002 RQ25, 1999 TE5, 162168, 138877, 5626
473Remanzacco Obs. in Italy, 1 in MPEC 2009-U70 -- 2009 UX17
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-U70 -- 2009 UX17
204Schiaparelli Obs. in Italy, 7 in MPEC 2009-U69 -- 2009 UQ, 2009 UJ, 2009 UF, 2009 UD, 2009 TN8, 2009 TK8, 2009 TK12
E12Siding Spring Survey (SSS) in New South Wales, 12 in MPECs 2009-U69, 2009-U71 & 2009-U72 -- 2009 UZ17, 2009 UY17, 2009 UN3, 2009 TK, 2009 SQ172, 2009 HD21, 1999 TE5, 212546, 155334, 3552, 2100, 1863
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-U68 -- 2009 HW77
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UN, 2009 UM, 2009 UK14, 2009 UJ5, 2009 UF2, 2009 UE2, 2009 UD2, 2009 TB3, 2009 SU19
926Tenagra II Obs. in Arizona, 7 in MPECs 2009-U69 & 2009-U70 -- 2009 UX17, 2009 UR5, 2009 UN1, 2009 UJ5, 2009 UE, 2009 TO8, 2009 TG10
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-U70 -- 2009 UX17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 UK14JPL Sentry1315R E M O V E DJPL: Risk listing removed at 1031 UTC.
2009 UN3JPL Sentry13152026-2108711.1e-07-3.19-4.060JPL: "Analysis based on 14 observations spanning 2.9909 days (2009-Oct-19.59856 to 2009-Oct-22.58941)." Diameter approximately 0.919 km. from mean, weighted H=17.8.
NEODyS13152013-20901492.94e-07-2.54-2.990NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/10/19.599 to 2009/10/22.590."
2009 UF2JPL Sentry1315R E M O V E DJPL: Risk listing removed at 1029 UTC.
NEODyS1315R E M O V E D-
2009 TUJPL Sentry13152086-209552.2e-05-5.87-6.320JPL: "Analysis based on 57 observations spanning 8.2739 days (2009-Oct-10.18978 to 2009-Oct-18.463635)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
NEODyS1315208632.15e-05-5.88-6.320NEODyS: "Based on 58 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/18.464."

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 '09

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

1802Grabbed MPEC 2009-U72 - 2009 UZ17 - see above
1712Grabbed MPEC 2009-U70 - 2009 UX17 - see above
Grabbed MPEC 2009-U71 - 2009 UY17 - see above
1315Noted that JPL Sentry has updated its 2009 TU risk assessment - see above
Noted that NEODyS has updated its 2009 TU risk assessment - see above
Noted that JPL Sentry has removed 2009 UF2 as an impact risk - see above
Noted that NEODyS has removed 2009 UF2 as an impact risk - see above
Noted that JPL Sentry has removed 2009 UK14 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 UN3 risk assessment - see above
Noted that NEODyS has updated its 2009 UN3 risk assessment - see above
Grabbed MPEC 2009-U69 - Daily Orbit Update - see above
0407Grabbed MPEC 2009-U68 - 2009 HW77 - see above