Contents  on 28 April '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 28 April '09

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of fifteen 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 28 April '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-H76 - "15:55 UT" - 2009 HZ67


MPEC 2009-H75 - "15:52 UT" - 2009 HY67


MPEC 2009-H74 - "15:49 UT" - 2009 HX67


MPEC 2009-H73 - "15:41 UT" - 2009 HW67


MPEC 2009-H72 - "15:38 UT" - 2009 HV67


MPEC 2009-H71 - "15:05 UT" - Observations of Comets


MPEC 2009-H70 - "14:57 UT" - Comet C/2009 F6 (Yi-SWAN)


MPEC 2009-H69 - "14:54 UT" - Comet C/2009 F5 (McNaught)


MPEC 2009-H68 - "14:49 UT" - Comet C/2009 F4 (McNaught)


MPEC 2009-H67 - "14:45 UT" - Comet C/2009 F2 (McNaught)


MPEC 2009-H66 - "14:40 UT" - Comet C/2009 F1 (Larson)


MPEC 2009-H65 - "14:32 UT" - Comet C/2009 E1 (Itagaki)


<< DOU on 28 Apr. '09 >>  MPEC 2009-H64 - "06:09 UT" - Daily Orbit Update

Observers  on 28 April '09

A total of 54 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 8 in MPECs 2009-H65, 2009-H68, 2009-H70 & 2009-H71 -- C/2009 F6, C/2009 F4, C/2009 E1, C/2008 T2, C/2008 N1, C/2007 N3, 144P, 74P
J10Alicante Obs. in Spain, 7 in MPEC 2009-H71 -- C/2008 T2, C/2008 FK75, C/2006 W3, C/2006 OF2, 144P, 143P, 29P
300Bisei Spaceguard Center in Japan, 1 in MPEC 2009-H64 -- 2009 HG60
B59Borken Obs. in Germany, 1 in MPEC 2009-H71 -- C/2008 FK75
B96Brixiis Obs. in Belgium, 1 in MPEC 2009-H71 -- 116P
215Buchloe Obs. in Germany, 4 in MPECs 2009-H70 & 2009-H71 -- C/2009 F6, 67P, 59P, 29P
235CAST Obs. in Italy, 17 in MPECs 2009-H69, 2009-H70 & 2009-H71 -- C/2009 F6, C/2009 F5, C/2008 T2, C/2008 FK75, C/2007 N3, C/2006 Q1, C/2006 OF2, C/2005 L3, 144P, 116P, 88P, 77P, 74P, 67P, 65P, 59P, 29P
J96Cantabria Obs. in Spain, 3 in MPECs 2009-H69 & 2009-H71 -- C/2009 F5, C/2007 N3, 29P
160Castelmartini Obs. in Italy, 6 in MPEC 2009-H71 -- C/2007 N3, C/2006 Q1, C/2006 OF2, 144P, 116P, 65P
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2009-H64, 2009-H71 & 2009-H72 -- 2009 HV67, 2009 HV2, 2009 HL21, 2009 HC, P/2009 F7, 2008 YE29, 2008 WL60, 2007 BT2, 1990 UA, 212546, 211871, 16960, 141432, 3102, 210P, 77P, 33P
A77Chante-Perdrix Obs. in France, 7 in MPECs 2009-H68, 2009-H69 & 2009-H71 -- C/2009 F5, C/2009 F4, C/2008 N1, C/2008 FK75, C/2006 W3, 209P, 22P
B84Cyclops Obs. in The Netherlands, 1 in MPEC 2009-H71 -- 116P
448Desert Moon Obs. in New Mexico, 6 in MPEC 2009-H64 -- 2009 HW44, 2009 HV2, 2009 HB, 2009 DC43, 2009 CC3, 2001 CK32
I21El Condor Obs. in Argentina, 6 in MPEC 2009-H64 -- 2009 DL1, 2008 WN2, 2005 SG19, 194386, 175706, 3552
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 2 in MPECs 2009-H64 & 2009-H76 -- 2009 HZ67, 2009 HG60
B83Gieres Obs. in France, 1 in MPEC 2009-H71 -- C/2005 L3
J95Great Shefford Obs. in England, 1 in MPEC 2009-H76 -- 2009 HZ67
379Hamamatsu-Yuto Obs. in Japan, 9 in MPECs 2009-H64 & 2009-H71 -- 2009 HV44, 2009 DE47, 2008 WL60, 2008 SV11, C/2007 N3, 2007 BT2, C/2006 Q1, C/2006 OF2, C/2005 L3
024Heidelberg-Konigstuhl Obs. in Germany, 5 in MPEC 2009-H71 -- C/2007 N3, C/2006 OF2, 144P, 116P, 29P
046Klet Obs. in the Czech Republic, 7 in MPEC 2009-H64 -- 2009 HU44, 2009 HL21, 2009 HD, 2009 HC, 2009 FU23, 2009 CQ1, 2008 SV11
704LINEAR in New Mexico, 8 in MPECs 2009-H64 & 2009-H71 -- 2009 HU44, 2007 BT2, C/2002 VQ94, 39557, 162900, 3102, 88P, 77P
J31La Axarquia Obs. in Spain, 2 in MPEC 2009-H71 -- C/2006 Q1, 116P
212La Dehesilla Obs. in Spain, 14 in MPECs 2009-H69 & 2009-H71 -- C/2009 F5, C/2008 T2, C/2008 Q1, C/2008 FK75, C/2007 N3, C/2006 Q1, C/2005 L3, 210P, 116P, 88P, 77P, 65P, 29P, 22P
J38La Vara Obs. in Spain, 4 in MPEC 2009-H71 -- C/2006 OF2, 116P, 65P, 29P
B33Libbiano Obs. in Italy, 1 in MPEC 2009-H71 -- 215P
J59Linceo Obs. in Spain, 4 in MPECs 2009-H69 & 2009-H71 -- C/2009 F5, 88P, 77P, 65P
130Lumezzane Obs. in Italy, 1 in MPEC 2009-H70 -- C/2009 F6
B82Maidbronn Obs. in Germany, 3 in MPEC 2009-H71 -- C/2007 T5, C/2006 OF2, 33P
J40Malaga Obs. in Spain, 9 in MPECs 2009-H69 & 2009-H71 -- C/2009 F5, C/2008 T2, C/2007 N3, C/2006 OF2, 144P, 88P, 67P, 65P, 22P
118Modra Obs. in Slovakia, 1 in MPEC 2009-H72 -- 2009 HV67
152Moletai Obs. in Lithuania, 1 in MPEC 2009-H64 -- 2009 DF1
945Monte Deva Obs. in Spain, 4 in MPEC 2009-H71 -- C/2008 T2, C/2007 N3, C/2006 Q1, 67P
900Moriyama Obs. in Japan, 14 in MPECs 2009-H68, 2009-H69 & 2009-H71 -- C/2009 F5, C/2009 F4, C/2008 Q1, C/2008 FK75, C/2006 Q1, C/2006 OF2, C/2005 L3, 210P, 144P, 143P, 116P, 88P, 74P, 65P
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2009-H64, 2009-H66, 2009-H72, 2009-H73, 2009-H74, 2009-H75 & 2009-H76 -- 2009 HZ67, 2009 HY67, 2009 HX67, 2009 HW67, 2009 HV67, 2009 HD21, 2009 HC21, C/2009 F1, 1998 WT30, 65803, 31345, 15745, 152941, 2059
A13Naef Obs. in Switzerland, 1 in MPEC 2009-H71 -- 215P
J47Nazaret Obs. in Spain, 5 in MPECs 2009-H66 & 2009-H71 -- C/2009 F1, C/2005 L3, 143P, 77P, 29P
423North Ryde Obs. in New South Wales, 3 in MPECs 2009-H67, 2009-H68 & 2009-H69 -- C/2009 F5, C/2009 F4, C/2009 F2
A32Panker Obs. in Germany, 7 in MPECs 2009-H70 & 2009-H71 -- C/2009 F6, C/2007 N3, 210P, 116P, 74P, 65P, 29P
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2009-H72 & 2009-H73 -- 2009 HW67, 2009 HV67
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 3 in MPECs 2009-H64 & 2009-H71 -- C/2007 N3, C/2002 VQ94, 138911
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-H71 -- 209P
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2009-H71 -- P/2009 F7
J41Raheny Obs. in Ireland, 2 in MPECs 2009-H72 & 2009-H76 -- 2009 HZ67, 2009 HV67
473Remanzacco Obs. in Italy, 3 in MPECs 2009-H66, 2009-H69 & 2009-H71 -- C/2009 F5, C/2009 F1, 116P
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-H72 & 2009-H73 -- 2009 HW67, 2009 HV67
B70Sant Celoni Obs. in Spain, 2 in MPEC 2009-H71 -- 77P, 65P
204Schiaparelli Obs. in Italy, 5 in MPECs 2009-H68, 2009-H70 & 2009-H71 -- C/2009 F6, C/2009 F4, C/2008 FK75, C/2007 T5, C/2006 Q1
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-H64 -- 2009 HG, 2009 HF, 2009 EO2
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-H64 & 2009-H71 -- 2005 SA71, 88P
291Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2009-H64 -- 2009 HY51, 2009 HU2, 2009 HR2, 2009 HH21, 2009 HD21, 2009 HC21, 2009 HC, 2009 FV4, 2009 FF44, 2009 CC3, 2006 PW
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2009-H64, 2009-H73 & 2009-H74 -- 2009 HX67, 2009 HW67, 2009 HB
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-H71 -- C/2008 T2, C/2006 OF2
H10Tzec Maun Obs. Mayhill in New Mexico, 4 in MPECs 2009-H71 & 2009-H76 -- 2009 HZ67, P/2009 F7, C/2002 VQ94, 88P
H47Vicksburg Obs. in Mississippi, 6 in MPEC 2009-H71 -- C/2005 L3, 116P, 88P, 77P, 74P, 65P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 April '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 HW67JPL Sentry18052036-208271.3e-06-6.10-6.380JPL: "Analysis based on 20 observations spanning .95200 days (2009-Apr-27.29601 to 2009-Apr-28.24801)." Diameter approximately 0.021 km. from mean, weighted H=26.1.
2009 HD21NEODyS1322R E M O V E D-
JPL Sentry1322R E M O V E DJPL: Risk listing removed at 0850 UTC.
2009 HU2JPL Sentry13222053-2071243.2e-07-3.23-4.090JPL: "Analysis based on 49 observations spanning 8.1543 days (2009-Apr-19.13168 to 2009-Apr-27.28603)." Diameter approximately 0.777 km. from mean, weighted H=18.2.
NEODyS13222045-2067206.61e-07-2.86-3.240NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2009/04/19.132 to 2009/04/27.287."
2009 HCJPL Sentry13222097-209851.1e-06-6.35-6.860JPL: "Analysis based on 94 observations spanning 10.127 days (2009-Apr-17.23164 to 2009-Apr-27.35831)." Diameter approximately 0.036 km. from mean, weighted H=24.9.

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 28 April '09

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

1805Noted that JPL Sentry has posted 2009 HW67 as an impact risk - see above
1700Grabbed MPEC 2009-H72 - 2009 HV67 - see above
Grabbed MPEC 2009-H73 - 2009 HW67 - see above
Grabbed MPEC 2009-H74 - 2009 HX67 - see above
Grabbed MPEC 2009-H75 - 2009 HY67 - see above
Grabbed MPEC 2009-H76 - 2009 HZ67 - see above
1534Grabbed MPEC 2009-H70 - Comet C/2009 F6 (Yi-SWAN) - see above
Grabbed MPEC 2009-H71 - Observations of Comets - see above
1500Grabbed MPEC 2009-H65 - Comet C/2009 E1 (Itagaki) - see above
Grabbed MPEC 2009-H66 - Comet C/2009 F1 (Larson) - see above
Grabbed MPEC 2009-H67 - Comet C/2009 F2 (McNaught) - see above
Grabbed MPEC 2009-H68 - Comet C/2009 F4 (McNaught) - see above
Grabbed MPEC 2009-H69 - Comet C/2009 F5 (McNaught) - see above
1322Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that JPL Sentry has removed 2009 HD21 as an impact risk - see above
Noted that NEODyS has removed 2009 HD21 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 HU2 risk assessment - see above
Noted that NEODyS has updated its 2009 HU2 risk assessment - see above
Grabbed MPEC 2009-H64 - Daily Orbit Update - see above