Contents  on 13 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 13 May '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of seven 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 13 May '09

Minor Planet Electronic Circulars

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


MPEC 2009-J55 - "18:16 UT" - 2009 JL2


MPEC 2009-J54 - "15:54 UT" - 2009 JM2


MPEC 2009-J53 - "15:49 UT" - 2009 JL2


<< DOU on 13 May '09 >>  MPEC 2009-J52 - "06:06 UT" - Daily Orbit Update

Observers  on 13 May '09

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2009-J54 -- 2009 JM2
H55Astronomical Research Obs. (ARO) in Illinois, 15 in MPEC 2009-J52 -- 2009 JR, 2009 JM1, 2009 HY51, 2009 HX51, 2009 HV2, 2009 HU44, 2009 HM82, 2009 HG60, 2009 HG, 2009 HD21, 2009 HC, 2009 FN28, 2009 BL2, 2002 LV, 2000 KN44
670Camarillo Obs. in southern California, 1 in MPEC 2009-J54 -- 2009 JM2
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-J52, 2009-J53 & 2009-J54 -- 2009 JR, 2009 JM2, 2009 JL2, 2009 CQ1, 2008 WL60, 2005 SA71, 212546, 200840, 7088, 4179
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-J54 -- 2009 JM2
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2009-J53 & 2009-J54 -- 2009 JM2, 2009 JL2
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-J52 -- 2009 HC82
B15Inastars Obs. in Germany, 2 in MPECs 2009-J53 & 2009-J54 -- 2009 JM2, 2009 JL2
118Modra Obs. in Slovakia, 3 in MPECs 2009-J52, 2009-J53 & 2009-J54 -- 2009 JM2, 2009 JL2, 2009 HV44
900Moriyama Obs. in Japan, 2 in MPECs 2009-J53, 2009-J54 & 2009-J55 -- 2009 JM2, 2009 JL2
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-J54 -- 2009 JM2
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-J54 -- 2009 JM2
H06.Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-J54 -- 2009 JM2
J41Raheny Obs. in Ireland, 2 in MPECs 2009-J53 & 2009-J54 -- 2009 JM2, 2009 JL2
473Remanzacco Obs. in Italy, 1 in MPEC 2009-J53 -- 2009 JL2
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-J54 & 2009-J55 -- 2009 JM2, 2009 JL2
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-J52 -- 2009 HU44, 2009 HC21
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-J55 -- 2009 JL2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-J54 -- 2009 JM2
G56Walnut Creek Obs. in northern California, 2 in MPECs 2009-J52 & 2009-J54 -- 2009 JM2, 213869
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 JL2JPL Sentry20102057-208548.6e-06-5.60-5.920JPL #2 for the day: "Analysis based on 52 observations spanning 1.2422 days (2009-May-12.38588 to 2009-May-13.62807)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
2009 HCJPL Sentry13132095-209851.7e-06-6.17-6.760JPL: "Analysis based on 117 observations spanning 24.922 days (2009-Apr-17.23164 to 2009-May-12.153619)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS1313209012.27e-08-7.99-7.990NEODyS: "Based on 119 optical observations (of which 2 are rejected as outliers) from 2009/04/17.232 to 2009/05/12.154."

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 13 May '09

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

2010Noted that JPL Sentry has updated its 2009 JL2 risk assessment - see above
1830Grabbed MPEC 2009-J55 - 2009 JL2 - see above
1809Noted that JPL Sentry has posted 2009 JL2 as an impact risk - see above
1600Grabbed MPEC 2009-J53 - 2009 JL2 - see above
Grabbed MPEC 2009-J54 - 2009 JM2 - see above
1313Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that NEODyS has reposted 2009 HC as an impact risk - see above
Grabbed MPEC 2009-J52 - Daily Orbit Update - see above