Contents  on 25 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 25 May '09

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, two were "one nighters."

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 25 May '09

Minor Planet Electronic Circulars

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


<< DOU on 25 May '09 >>  MPEC 2009-K44 - "06:07 UT" - Daily Orbit Update


MPEC 2009-K43 - "05:08 UT" - 2004 LC2 = 2009 KG3

Observers  on 25 May '09

Eleven observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2009-K44 -- 2009 KY1, 2009 KM, 2009 KK, 2009 JR, 2009 JM2
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2009-K44 -- 2009 KY1, 2009 JR, 2009 JL1, 2009 JG1, 4257
I21El Condor Obs. in Argentina, 1 in MPEC 2009-K44 -- 2002 LT38
442Gualba Obs. in Spain, 1 in MPEC 2009-K44 -- 2009 HC82
118Modra Obs. in Slovakia, 2 in MPEC 2009-K44 -- 2009 HD82, 2009 EQ2
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2009-K44 -- 2009 JM2
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-K44 -- 5620
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-K44 -- 2009 KG3
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-K44 -- 2009 KG3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-K44 -- 153311
611Starkenburg Obs. in Germany, 1 in MPEC 2009-K44 -- 2009 JM2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 KG3JPL Sentry1529R E M O V E DJPL #2 for the day: Risk listing removed at 1518 UTC.
2009 KE3NEODyS14282018-203759.37e-10-4.91-5.200NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/05/23.766 to 2009/05/24.646."
JPL Sentry05152018-2101105.3e-09-4.84-5.390JPL: "Analysis based on 10 observations spanning .88020 days (2009-May-23.76493 to 2009-May-24.64513)." Diameter approximately 0.830 km. from mean, weighted H=18.1.
2009 KC3NEODyS14282031-205586.0e-07-2.61-2.780NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/05/04.595 to 2009/05/24.498."
JPL Sentry05152031-2103106.7e-07-2.56-2.720JPL: "Analysis based on 19 observations spanning 19.903 days (2009-May-04.59432 to 2009-May-24.49722)." Diameter approximately 0.910 km. from mean, weighted H=17.9.
2009 KMJPL Sentry1428209113.0e-07-4.02-4.020JPL: "Analysis based on 55 observations spanning 6.9343 days (2009-May-17.26047 to 2009-May-24.19476)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2009 KKJPL Sentry15292022-203854.6e-05-1.49-1.501JPL: "Analysis based on 68 observations spanning 6.9541 days (2009-May-17.25987 to 2009-May-24.21401)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS14282022-203844.56e-05-1.49-1.501NEODyS: "Based on 68 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/24.215. NOTE: The Virtual Impactor in 2022/05/29.767 ... is rated as Torino Scale 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 25 May '09

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

1529Noted that JPL Sentry has removed 2009 KG3 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
1428Noted that NEODyS has posted 2009 KC3 as an impact risk - see above
Noted that NEODyS has posted 2009 KE3 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
Grabbed MPEC 2009-K44 - Daily Orbit Update - see above
0515Noted that JPL Sentry has posted 2009 KC3 as an impact risk - see above
Noted that JPL Sentry has posted 2009 KE3 as an impact risk - see above
Noted that JPL Sentry has posted 2009 KG3 as an impact risk - see above
Grabbed MPEC 2009-K43 - 2004 LC2 = 2009 KG3 - see above