Contents  on 20 May '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 20 May '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active yesterday.

New MPECs  on 20 May '09

Minor Planet Electronic Circulars

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


<< DOU on 20 May '09 >>  MPEC 2009-K23 - "06:07 UT" - Daily Orbit Update

Observers  on 20 May '09

A total of 20 observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 21 in MPEC 2009-K23 -- 2009 KN, 2009 KM, 2009 KL, 2009 KK, 2009 JR2, 2009 JM2, 2009 HZ67, 2009 HU2, 2009 HM82, 2009 HG, 2009 HC, 2009 FY29, 2009 FU23, 2009 FL25, 2009 ED1, 2009 CR2, 2009 BH81, 2006 KZ37, 2002 FT6, 2001 FE90, 1998 WT7
B88Bigmuskie Obs. in Italy, 3 in MPEC 2009-K23 -- 2009 JR, 2009 JM2, 2008 WL60
B09Capannoli Obs. in Italy, 1 in MPEC 2009-K23 -- 143651
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-K23 -- 2009 JM2
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-K23 -- 2009 KY1
J95Great Shefford Obs. in England, 3 in MPEC 2009-K23 -- 2009 KY1, 2009 KJ, 2009 JG2
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-K23 -- 2009 JM2
240Herrenberg Obs. in Germany, 1 in MPEC 2009-K23 -- 37655
682Kanab Obs. in Utah, 1 in MPEC 2009-K23 -- 2009 JR5
J75La Sagra Obs. in Spain, 5 in MPEC 2009-K23 -- 2009 KY1, 2009 JG1, 2009 HG, 2008 WN2, 207945
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2009-K23 -- 2009 JM2, 2009 HV44, 2009 HD82
932McCarthy Obs. in Connecticut, 1 in MPEC 2009-K23 -- 2009 KK
900Moriyama Obs. in Japan, 1 in MPEC 2009-K23 -- 2009 JM2
A13Naef Obs. in Switzerland, 2 in MPEC 2009-K23 -- 2009 HG, 214088
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2009-K23 -- 2009 JM2, 212546
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2009-K23 -- 2009 JM2, 2009 EQ2
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-K23 -- 2009 HU58
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-K23 -- 2008 WN2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-K23 -- 2009 KK
A48Verona Obs. in Italy, 2 in MPEC 2009-K23 -- 2009 JM2, 2009 JG2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 May '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 KNNEODyS1322R E M O V E D-
JPL Sentry1322R E M O V E DJPL: Risk listing removed at 0850 UTC.
2009 KMJPL Sentry13222052-209052.3e-09-6.00-6.390JPL: "Analysis based on 31 observations spanning 1.9207 days (2009-May-17.26047 to 2009-May-19.181122)." Diameter approximately 0.325 km. from mean, weighted H=20.1.
NEODyS13222068-209041.86e-09-6.13-6.420NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/19.182."
2009 KKJPL Sentry15002022-2053123.6e-05-1.68-1.890JPL: "Analysis based on 44 observations spanning 2.9157 days (2009-May-17.25987 to 2009-May-20.17558)." Diameter approximately 0.277 km. from mean, weighted H=20.4.
NEODyS13222022-2049113.55e-05-1.68-1.890NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/20.176."
2009 HCJPL Sentry13222095-209969.9e-07-6.38-6.610JPL: "Analysis based on 136 observations spanning 31.915 days (2009-Apr-17.23164 to 2009-May-19.14646)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS1322R E M O V E D-

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 20 May '09

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

1500Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
1322Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that NEODyS has removed 2009 HC as an impact risk - see above
Noted that NEODyS has updated its 2009 KK risk assessment - see above
Noted that JPL Sentry has updated its 2009 KM risk assessment - see above
Noted that NEODyS has updated its 2009 KM risk assessment - see above
Noted that JPL Sentry has removed 2009 KN as an impact risk - see above
Noted that NEODyS has removed 2009 KN as an impact risk - see above
Grabbed MPEC 2009-K23 - Daily Orbit Update - see above