Contents  on 21 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 21 May '09

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter."

New MPECs  on 21 May '09

Minor Planet Electronic Circulars

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


MPEC 2009-K26 - "14:44 UT" - Comet C/2009 K2 (Catalina)


MPEC 2009-K25 - "14:37 UT" - Comet P/2009 K1 (Gibbs)


<< DOU on 21 May '09 >>  MPEC 2009-K24 - "06:07 UT" - Daily Orbit Update

Observers  on 21 May '09

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

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 13 in MPEC 2009-K24 -- 2009 KN, 2009 KM, 2009 KL, 2009 KK, 2009 JR, 2009 HX51, 2009 HW44, 2009 HU58, 2009 FG19, 2009 DF1, 2009 CC3, 2009 AV, 2004 JR1
A81Balzaretto Obs. in Italy, 2 in MPEC 2009-K24 -- 2009 JM2, 207945
B88Bigmuskie Obs. in Italy, 4 in MPEC 2009-K24 -- 85989, 162181, 5620, 3103
215Buchloe Obs. in Germany, 1 in MPEC 2009-K26 -- C/2009 K2
160Castelmartini Obs. in Italy, 6 in MPECs 2009-K24 & 2009-K26 -- C/2009 K2, 2009 JM2, 2009 HD82, 2002 LV, 85989, 15745
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-K24 -- 2009 JM2
151Eschenberg Obs. in Switzerland, 1 in MPEC 2009-K24 -- 2009 JM2
J95Great Shefford Obs. in England, 1 in MPEC 2009-K24 -- 2009 JG2
B19Iluro Obs. in Spain, 3 in MPEC 2009-K24 -- 2009 JM2, 138883, 5620
J75La Sagra Obs. in Spain, 1 in MPEC 2009-K24 -- 2009 KY1
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2009-K24 -- 2009 JR, 2008 JV19, 1998 SC15
213Montcabre Obs. in Spain, 2 in MPECs 2009-K25 & 2009-K26 -- C/2009 K2, P/2009 K1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-K24 -- 2009 ED27
A13Naef Obs. in Switzerland, 4 in MPEC 2009-K24 -- 2002 LV, 2000 KN44, 15745, 5620
J47Nazaret Obs. in Spain, 2 in MPECs 2009-K25 & 2009-K26 -- C/2009 K2, P/2009 K1
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2009-K24 -- 2009 JM2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPECs 2009-K24 & 2009-K26 -- C/2009 K2, 2009 JM2, 2009 JK1, 2009 JG1, 2009 HV44, 2009 EQ2, 2000 KN44, 1998 SC15
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-K24 -- 4015
B40Skylive Obs. in Italy, 1 in MPEC 2009-K26 -- C/2009 K2
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-K24 -- 2009 ED27
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-K25 -- P/2009 K1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-K24 -- 2009 KM
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2009-K24 -- 3988
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-K24 -- 4015
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 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 KMJPL Sentry13062074-209122.8e-07-4.04-4.050JPL: "Analysis based on 38 observations spanning 2.9428 days (2009-May-17.26047 to 2009-May-20.20324)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS1306207411.97e-09-6.10-6.100NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/20.204."
2009 KKJPL Sentry15022022-2053123.6e-05-1.68-1.890JPL: "Analysis based on 47 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.
NEODyS13062022-2049133.63e-05-1.68-1.900NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/20.176."
2009 ED27JPL Sentry1306203121.5e-09-3.90-3.940JPL: "Analysis based on 11 observations spanning 4.0975 days (2009-Mar-15.26893 to 2009-Mar-19.36638)." Diameter approximately 2.700 km. from mean, weighted H=15.5.
NEODyS13062010-2090212.06e-09-2.94-2.970NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/03/15.270 to 2009/03/19.367."

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 21 May '09

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

1502Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
Grabbed MPEC 2009-K25 - Comet P/2009 K1 (Gibbs) - see above
Grabbed MPEC 2009-K26 - Comet C/2009 K2 (Catalina) - see above
Noted that the NEOCP has become active
1306Noted that JPL Sentry has posted 2009 ED27 as an impact risk - see above
Noted that NEODyS has posted 2009 ED27 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
Grabbed MPEC 2009-K24 - Daily Orbit Update - see above