Contents  on 13 June '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 June '09

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." So far The Tracking News has counted a total of five 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 June '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-L44 - "15:28 UT" - 2009 LX


<< DOU on 13 June '09 >>  MPEC 2009-L43 - "06:06 UT" - Daily Orbit Update


MPEC 2009-L42 - "01:50 UT" - 2009 LS

Observers  on 13 June '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-L42 -- 2009 LS
B88Bigmuskie Obs. in Italy, 2 in MPEC 2009-L43 -- 2002 LT38, 215442
432Boambee Obs. in New South Wales, 6 in MPEC 2009-L43 -- 2009 KC3, 2002 LT38, 207945, 143651, 4954, 3552
160Castelmartini Obs. in Italy, 2 in MPEC 2009-L43 -- 2002 LV, 212546
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-L42 & 2009-L43 -- 2009 LS, 2006 HR29, 2005 MO13, 214088, 153311, 5620
176Consell Obs. in Spain, 1 in MPEC 2009-L42 -- 2009 LS
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-L42 -- 2009 LS
B23Fiamene Obs. in Italy, 6 in MPEC 2009-L43 -- 2009 BL2, 2005 MO13, 2002 LV, 85989, 162181, 3103
J28Jaen Obs. in Spain, 1 in MPEC 2009-L42 -- 2009 LS
232Masquefa Obs. in Spain, 1 in MPEC 2009-L42 -- 2009 LS
A13Naef Obs. in Switzerland, 4 in MPEC 2009-L43 -- 54660, 215442, 159399, 138883
J41Raheny Obs. in Ireland, 2 in MPECs 2009-L42 & 2009-L43 -- 2009 LS, 2009 LQ
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-L42 -- 2009 LS
E12Siding Spring Survey (SSS) in New South Wales, 9 in MPECs 2009-L43 & 2009-L44 -- 2009 LX, 2009 JM2, 2009 DE47, 2007 BT2, 2002 LT38, 2000 CO101, 207945, 152560, 4953
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-L43 -- 5620
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2009-L43 -- 2009 KT21, 2009 KM7, 2009 JR5, 2009 JR, 2009 HW44, 2009 HV58, 2009 FV4
611Starkenburg Obs. in Germany, 1 in MPEC 2009-L42 -- 2009 LS
147Suno Obs. in Italy, 1 in MPEC 2009-L42 -- 2009 LS
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 June '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 LXJPL Sentry18162059-209841.6e-09-6.25-6.550JPL: "Analysis based on 11 observations spanning 1.8757 days (2009-Jun-11.69171 to 2009-Jun-13.56741)." Diameter approximately 0.441 km. from mean, weighted H=19.4.
2009 LSNEODyS15252011-2090489.86e-09-3.65-4.000NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2009/06/12.391 to 2009/06/12.988."
JPL Sentry04262033-2106489.7e-08-3.11-4.160JPL: "Analysis based on 37 observations spanning .59689 days (2009-Jun-12.39072 to 2009-Jun-12.98761)." Diameter approximately 1.000 km. from mean, weighted H=17.6.
2009 KT21JPL Sentry1525R E M O V E DJPL: Risk listing removed at 0848 UTC.
NEODyS1525R 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 13 June '09

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

1816Noted that JPL Sentry has posted 2009 LX as an impact risk - see above
1643Grabbed MPEC 2009-L44 - 2009 LX - see above
1525Noted that JPL Sentry has removed 2009 KT21 as an impact risk - see above
Noted that NEODyS has removed 2009 KT21 as an impact risk - see above
Noted that NEODyS has posted 2009 LS as an impact risk - see above
Grabbed MPEC 2009-L43 - Daily Orbit Update - see above
0426Noted that JPL Sentry has posted 2009 LS as an impact risk - see above
0305Grabbed MPEC 2009-L42 - 2009 LS - see above