Contents  on 25 February '08

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 February '08

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter." So far The Tracking News has counted a total of five objects listed on the NEOCP at some point today.

New MPECs  on 25 February '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-D35 - "23:22 UT" - 2008 DJ


MPEC 2008-D34 - "19:12 UT" - 2007 JK43


MPEC 2008-D33 - "16:53 UT" - 2008 AO112


MPEC 2008-D32 - "15:56 UT" - Observations of Comets


MPEC 2008-D31 - "15:40 UT" - Comet C/2008 C1 (Chen-Gao)


MPEC 2008-D30 - "15:33 UT" - Comet C/2008 A1 (McNaught)


<< DOU on 25 Feb. '08 >>  MPEC 2008-D29 - "07:07 UT" - Daily Orbit Update

Observers  on 25 February '08

A total of 56 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 15 in MPECs 2008-D31 & 2008-D32 -- C/2008 C1, C/2007 W1, C/2007 U1, C/2007 G1, C/2007 D1, C/2007 B2, C/2006 S5, C/2006 K1, P/2005 SB216, C/2003 WT42, 110P, 50P, 46P, 29P, 17P
A44Altschwendt Obs. in Austria, 1 in MPEC 2008-D29 -- 2008 BT18
B37Ametlla del Valles Obs. in Spain, 2 in MPEC 2008-D32 -- P/2007 C2, C/2006 S5
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-D29 -- 2002 SQ
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2008-D32 -- C/2007 W1, C/2007 B2, 17P
A81Balzaretto Obs. in Italy, 2 in MPEC 2008-D29 -- 2008 CN1, 2006 DU62
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-D29 -- 2008 DE
B62Brelingen Obs., 1 in MPEC 2008-D32 -- C/2007 B2
215Buchloe Obs. in Germany, 6 in MPEC 2008-D32 -- C/2007 U1, C/2006 K1, 192P, 139P, 113P, 46P
J96Cantabria Obs. in Spain, 4 in MPEC 2008-D32 -- C/2007 D1, P/2007 C2, C/2006 S5, 124P
B20Carmelita Obs. in Spain, 1 in MPEC 2008-D32 -- 29P
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2008-D29 & 2008-D32 -- C/2007 W1, 85804, 40267, 137158, 93P
A77Chante-Perdrix Obs. in France, 3 in MPEC 2008-D32 -- 124P, 29P, 17P
B50Corner Obs. in Germany, 1 in MPEC 2008-D29 -- 1620
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-D29 -- 2008 DC, 2008 CL72, 2008 CC6, 2008 CC22, 2008 CC175, 2008 CA119
113Drebach Obs. in Germany, 7 in MPEC 2008-D29 -- 2008 CR116, 2008 CP116, 2008 CN1, 2007 YX1, 2005 EK70, 2005 BE2, 2002 TD66
151Eschenberg Obs. in Switzerland, 4 in MPEC 2008-D29 -- 2008 CN1, 2008 CC6, 2006 DU62, 2002 TD66
143Gnosca Obs. in Switzerland, 4 in MPEC 2008-D29 -- 2008 CR116, 2008 CN1, 2008 CC6, 4450
J95Great Shefford Obs. in England, 2 in MPEC 2008-D29 -- 2008 DB, 2008 CR118
458Guadarrama Obs. in Spain, 1 in MPEC 2008-D32 -- 29P
442Gualba Obs. in Spain, 2 in MPEC 2008-D32 -- 29P, 17P
D88Hiratsuka Obs., 9 in MPECs 2008-D30, 2008-D31 & 2008-D32 -- C/2008 C1, C/2008 A1, C/2007 U1, C/2006 W3, C/2006 S5, 110P, 93P, 74P, 46P
A21Irmtraut Obs. in Germany, 9 in MPECs 2008-D31 & 2008-D32 -- C/2008 C1, C/2007 B2, C/2006 W3, C/2006 S5, 192P, 110P, 65P, 46P, 29P
246KLENOT in the Czech Republic, 1 in MPEC 2008-D35 -- 2008 DJ
G89Kachina Obs. in Arizona, 2 in MPEC 2008-D32 -- P/2005 SB216, 172P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2008-D32 -- 65P
J66Kinver Obs. in England, 2 in MPEC 2008-D32 -- 93P, 50P
704LINEAR in New Mexico, 1 in MPEC 2008-D35 -- 2008 DJ
J38La Vara Obs. in Spain, 3 in MPEC 2008-D32 -- C/2006 W3, 29P, 17P
B57Laietania Obs. in Spain, 1 in MPEC 2008-D32 -- 29P
304Las Campanas Obs. in Chile, 1 in MPEC 2008-D34 -- 2007 JK43
130Lumezzane Obs. in Italy, 1 in MPEC 2008-D32 -- 172P
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-D29 -- 2008 CN1, 2005 EK70, 153591
A06Mataro Obs. in Spain, 1 in MPEC 2008-D32 -- 29P
J46Montana Blanca Obs. in the Canary Islands, 2 in MPECs 2008-D30 & 2008-D32 -- C/2008 A1, 46P
213Montcabre Obs. in Spain, 1 in MPEC 2008-D32 -- C/2007 G1
945Monte Deva Obs. in Spain, 3 in MPEC 2008-D32 -- C/2007 W1, 180P, 46P
900Moriyama Obs. in Japan, 4 in MPEC 2008-D32 -- C/2007 B2, C/2006 S5, 180P, 17P
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-D29 & 2008-D33 -- 2008 AO112, 177049
J93Mt. Tuffley Obs. in England, 6 in MPECs 2008-D29 & 2008-D32 -- 170891, 153591, 4954, 1036, 124P, 93P
A13Naef Obs. in Switzerland, 3 in MPEC 2008-D29 -- 2008 DC, 2000 QY69, 2000 DP107
J47Nazaret Obs. in Spain, 6 in MPECs 2008-D30 & 2008-D32 -- C/2008 A1, P/2007 C2, C/2006 S5, 46P, 29P, 17P
B49Paus Obs. in Spain, 3 in MPEC 2008-D32 -- P/2005 SB216, 65P, 29P
B58Polaris Obs. in Hungary, 3 in MPECs 2008-D31 & 2008-D32 -- C/2008 C1, C/2007 B2, C/2006 W3
473Remanzacco Obs. in Italy, 1 in MPEC 2008-D32 -- 29P
A41Rezman Obs. in Slovenia, 5 in MPEC 2008-D32 -- 110P, 93P, 74P, 46P, 29P
939Rodeno Obs. in Spain, 7 in MPECs 2008-D31 & 2008-D32 -- C/2008 C1, C/2006 W3, C/2006 S5, 124P, 93P, 46P, 17P
461SZTE Asteroid Program (SZTE) in Hungary, 6 in MPECs 2008-D29 & 2008-D35 -- 2008 DJ, 2008 DD, 2008 DC, 2008 CZ118, 2008 CC175, 2008 CB22
233San Vito Obs. in Italy, 1 in MPEC 2008-D31 -- C/2008 C1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-D29 -- 2007 PF2
510Siegen Obs. in Germany, 3 in MPECs 2008-D31 & 2008-D32 -- C/2008 C1, C/2006 S5, 29P
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-D29 -- 175189
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2008-D29 -- 2008 DB, 2008 CL116, 2008 CH1, 2008 CE5, 2008 CA22, 2008 BV2, 2008 BS2, 2008 AX1, 2008 AE4, 2007 YM56
A97Stammersdorf Obs. in Austria, 5 in MPECs 2008-D29, 2008-D31 & 2008-D32 -- C/2008 C1, 153591, 1620, 46P, 17P
A78Stia Obs. in Italy, 4 in MPEC 2008-D29 -- 2008 CL72, 2008 CD22, 2005 EK70, 170891
138Village-Neuf Obs. in France, 2 in MPEC 2008-D32 -- C/2006 S5, 110P

Impact Risk Monitoring  on 25 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 DEJPL Sentry1530R E M O V E DJPL: Risk listing removed at 1033 UTC.
NEODyS1530R E M O V E D
2008 DBNEODyS15312046-2090252.22e-05-5.05-5.130NEODyS: "Based on 44 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/25.013."
JPL Sentry15302046-2108273.8e-05-4.82-4.900JPL: "Analysis based on 43 observations spanning 6.7705 days (2008-Feb-18.242 to 2008-Feb-25.01246)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
2008 CL116JPL Sentry1530210219.7e-08-4.78-4.780JPL: "Analysis based on 63 observations spanning 14.055 days (2008-Feb-10.40671 to 2008-Feb-24.46154)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
NEODyS1530R E M O V E D
2008 AO112JPL Sentry21042009-2099463.9e-07-2.94-2.960JPL: "Analysis based on 8 observations spanning 1.0097 days (2008-Jan-11.08899 to 2008-Jan-12.098698)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

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 February '08

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

2354Grabbed MPEC 2008-D35 - 2008 DJ - see above
2201The NEOCP has become active
2104Noted that JPL Sentry has posted 2008 AO112 as an impact risk - see above
2003Grabbed MPEC 2008-D34 - 2007 JK43 - see above
1815Grabbed MPEC 2008-D33 - 2008 AO112 - see above
The NEOCP has become empty
1607Grabbed MPEC 2008-D30 - Comet C/2008 A1 (McNaught) - see above
Grabbed MPEC 2008-D31 - Comet C/2008 C1 (Chen-Gao) - see above
Grabbed MPEC 2008-D32 - Observations of Comets - see above
1531Noted that NEODyS has updated its 2008 DB risk assessment - see above
Grabbed MPEC 2008-D29 - Daily Orbit Update - see above
1530Noted that JPL Sentry has updated its 2008 CL116 risk assessment - see above
Noted that NEODyS has removed 2008 CL116 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 DB risk assessment - see above
Noted that JPL Sentry has removed 2008 DE as an impact risk - see above
Noted that NEODyS has removed 2008 DE as an impact risk - see above