Contents  on 27 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 27 May '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2341 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of ten 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 27 May '09

Minor Planet Electronic Circulars

As of last check at 2351 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-K59 - "23:05 UT" - 2004 EP95


MPEC 2009-K58 - "22:22 UT" - 2003 QO91


MPEC 2009-K57 - "22:07 UT" - 2002 PQ152


MPEC 2009-K56 - "19:31 UT" - 2004 RK9


MPEC 2009-K55 - "15:19 UT" - 2009 KD5


<< DOU on 27 May '09 >>  MPEC 2009-K54 - "06:08 UT" - Daily Orbit Update


MPEC 2009-K53 - "00:37 UT" - 2009 KT4

Observers  on 27 May '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-K54 -- 3988
I77CEAMIG-REA in Brazil, 1 in MPEC 2009-K54 -- 2009 KN4
B09Capannoli Obs. in Italy, 1 in MPEC 2009-K54 -- 3103
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-K54 & 2009-K55 -- 2009 KD5, 2002 FB6, 90367, 54401, 1863
693Catalina Station in Arizona, 2 in MPECs 2009-K53 & 2009-K55 -- 2009 KT4, 2009 KD5
807Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2009-K57 & 2009-K58 -- 2003 QO91, 2002 PQ152
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-K54 -- 214088
808El Leoncito Obs. in Argentina, 6 in MPEC 2009-K54 -- 2009 DL1, 214088, 207945, 138911, 136617, 4954
J95Great Shefford Obs. in England, 2 in MPECs 2009-K53 & 2009-K54 -- 2009 KW2, 2009 KT4
J28Jaen Obs. in Spain, 2 in MPEC 2009-K54 -- 2002 MQ3, 54660
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2009-K59 -- 2004 EP95
J75La Sagra Obs. in Spain, 2 in MPECs 2009-K54 & 2009-K55 -- 2009 KY1, 2009 KD5
688Lowell Obs. Anderson Mesa Station in Arizona, 2 in MPECs 2009-K57 & 2009-K58 -- 2003 QO91, 2002 PQ152
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-K53 & 2009-K54 -- 2009 KV2, 2009 KT4, 206910
J53Posadas Obs. in Spain, 2 in MPEC 2009-K54 -- 2009 JM2, 143651
D21Shenton Park Obs. in Western Australia, 3 in MPECs 2009-K54 & 2009-K56 -- 2009 KW2, 2009 KN4, 2004 RK9
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2009-K54 -- 2009 KY1, 2009 JR5, 2009 JR, 2009 DF1, 2008 KP, 2004 LC2, 2000 KN44, 99799, 65803, 31345, 214088, 138911
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2009-K54 -- 2009 KK, 2009 JR5, 2009 JM1, 2007 HF44, 2005 MO13, 2004 JR
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 May '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2350 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 KD5JPL Sentry18042015-2104856.6e-08-3.30-3.860JPL: "Analysis based on 14 observations spanning 1.2922 days (2009-May-26.13113 to 2009-May-27.42334)." Diameter approximately 0.991 km. from mean, weighted H=17.7.
2009 KT4NEODyS13522018-2077225.88e-08-5.61-6.070NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/05/26.168 to 2009/05/26.965."
JPL Sentry03252018-2108631.9e-07-5.12-5.630JPL: "Analysis based on 17 observations spanning .79689 days (2009-May-26.16694 to 2009-May-26.96383)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
2009 KQ4NEODyS13522014-2070123.76e-09-5.98-6.600NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/05/26.168 to 2009/05/26.943."
JPL Sentry03252014-2106442.1e-08-5.26-5.800JPL: "Analysis based on 19 observations spanning .77432 days (2009-May-26.16763 to 2009-May-26.94195)." Diameter approximately 0.278 km. from mean, weighted H=20.4.
2009 KN4JPL Sentry13522013-2108665.8e-07-3.05-3.840JPL: "Analysis based on 16 observations spanning 3.0961 days (2009-May-23.78358 to 2009-May-26.87971)." Diameter approximately 0.796 km. from mean, weighted H=18.1.
NEODyS13522013-2089253.54e-07-3.14-3.620NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2009/05/23.784 to 2009/05/26.880."
2009 KKJPL Sentry1516202213.6e-05-1.60-1.601JPL: "Analysis based on 73 observations spanning 8.9603 days (2009-May-17.25987 to 2009-May-26.22015)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS13522022-203823.62e-05-1.60-1.601NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/26.221. NOTE: The Virtual Impactor in 2022/05/29.763 ... 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 27 May '09

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

2322Grabbed MPEC 2009-K59 - 2004 EP95 - see above
2253Grabbed MPEC 2009-K57 - 2002 PQ152 - see above
Grabbed MPEC 2009-K58 - 2003 QO91 - see above
2000Grabbed MPEC 2009-K56 - 2004 RK9 - see above
1804Noted that JPL Sentry has posted 2009 KD5 as an impact risk - see above
1601Grabbed MPEC 2009-K55 - 2009 KD5 - see above
1516Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
1352Noted that NEODyS has updated its 2009 KK risk assessment - see above
Noted that JPL Sentry has updated its 2009 KN4 risk assessment - see above
Noted that NEODyS has posted 2009 KN4 as an impact risk - see above
Noted that NEODyS has posted 2009 KQ4 as an impact risk - see above
Noted that NEODyS has posted 2009 KT4 as an impact risk - see above
Grabbed MPEC 2009-K54 - Daily Orbit Update - see above
0325Noted that JPL Sentry has posted 2009 KQ4 as an impact risk - see above
Noted that JPL Sentry has posted 2009 KT4 as an impact risk - see above
Grabbed MPEC 2009-K53 - 2009 KT4 - see above