Contents  on 4 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.

Radar Astrometry  on 4 February '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:


Data addition noted at 2333 UTC when the database was dated 4 Feb.

NEOCP Activity  on 4 February '08

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

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of twelve objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 4 February '08

Minor Planet Electronic Circulars

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


MPEC 2008-C32 - "22:16 UT" - 2008 CT1


MPEC 2008-C31 - "19:53 UT" - 2008 CS1


MPEC 2008-C30 - "19:49 UT" - 2008 CR1


MPEC 2008-C29 - "19:44 UT" - 2008 CQ1


MPEC 2008-C28 - "15:39 UT" - 2008 CN1


MPEC 2008-C27 - "15:37 UT" - 2008 CM1


MPEC 2008-C26 - "15:32 UT" - 2008 CL1


MPEC 2008-C25 - "15:28 UT" - 2008 CJ1


MPEC 2008-C24 - "15:24 UT" - 2008 CH1


<< DOU on 4 Feb. '08 >>  MPEC 2008-C23 - "07:08 UT" - Daily Orbit Update


MPEC 2008-C22 - "00:52 UT" - Observations of Comets


MPEC 2008-C21 - "00:25 UT" - Comet C/2008 C1 (Chen-Gao)


MPEC 2008-C20 - "00:22 UT" - Comet P/2008 A2 (LINEAR)


MPEC 2008-C19 - "00:18 UT" - Comet C/2008 A1 (McNaught)


MPEC 2008-C18 - "00:15 UT" - Comet C/2007 Y1 (LINEAR)

Observers  on 4 February '08

A total of 82 observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2008-C19 -- C/2008 A1
349Ageo Obs. in Japan, 15 in MPECs 2008-C18, 2008-C20, 2008-C21 & 2008-C22 -- C/2008 C1, P/2008 A2, C/2007 Y1, C/2007 W1, P/2007 H1, C/2007 G1, C/2007 D3, C/2007 B2, C/2005 L3, 192P, 173P, 70P, 46P, 8P, 7P
B03Alter Satzberg Obs. in Austria, 3 in MPECs 2008-C26, 2008-C27 & 2008-C28 -- 2008 CN1, 2008 CM1, 2008 CL1
B37Ametlla del Valles Obs. in Spain, 4 in MPEC 2008-C22 -- C/2007 S2, P/2007 C2, 29P, 8P
7054Andrew Becker via Apache Point Obs. in New Mexico, 2 in MPEC 2008-C23 -- 2006 SP134, 2005 SR1
251Arecibo in Puerto Rico, 1 in radar -- 2007 TU24
H55Astronomical Research Obs. (ARO) in Illinois, 6 in MPECs 2008-C21, 2008-C23, 2008-C24 & 2008-C27 -- 2008 CQ, 2008 CP, 2008 CO, 2008 CM1, 2008 CH1, C/2008 C1
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2008-C22 -- P/2007 T6, 180P
467Auckland Obs. in New Zealand, 10 in MPECs 2008-C18, 2008-C19 & 2008-C22 -- C/2008 A1, C/2007 Y1, C/2007 W1, C/2007 T1, C/2007 Q3, C/2007 B2, C/2006 S5, C/2006 K4, 26P, 8P
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-C22 -- 29P
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-C32 -- 2008 CT1
726Brainerd Obs. in Minnesota, 2 in MPEC 2008-C22 -- 110P, 29P
215Buchloe Obs. in Germany, 13 in MPECs 2008-C18, 2008-C20 & 2008-C22 -- P/2008 A2, C/2007 Y1, P/2007 VQ11, P/2007 T6, P/2007 H1, 192P, 136P, 124P, 117P, 108P, 46P, 29P, 17P
235CAST Obs. in Italy, 8 in MPEC 2008-C22 -- C/2006 S5, 173P, 128P, 124P, 110P, 93P, 46P, 29P
B20Carmelita Obs. in Spain, 1 in MPEC 2008-C22 -- 17P
B53Casal Lumbroso Obs., 1 in MPEC 2008-C22 -- 50P
E00Castlemaine Obs. in Victoria, 2 in MPECs 2008-C19 & 2008-C22 -- C/2008 A1, C/2007 T1
703Catalina Sky Survey (CSS) in Arizona, 24 in MPECs 2008-C18, 2008-C22, 2008-C23, 2008-C27, 2008-C28, 2008-C30 & 2008-C31 -- 6344 P-L, 2008 CS1, 2008 CR1, 2008 CQ, 2008 CN1, 2008 CM1, 2008 CM, 2008 CK, 2008 BD15, 2008 AU26, C/2007 Y1, C/2007 U1, P/2007 T6, C/2006 K1, 2004 AR1, 2002 AV31, 90403, 4450, 1620, 188P, 180P, 139P, 113P, 108P
A77Chante-Perdrix Obs. in France, 8 in MPECs 2008-C20 & 2008-C22 -- P/2008 A2, C/2007 U1, 194P, 188P, 136P, 117P, 29P, 17P
448Desert Moon Obs. in New Mexico, 6 in MPECs 2008-C21, 2008-C23, 2008-C27 & 2008-C28 -- 2008 CN1, 2008 CM1, C/2008 C1, 2008 AU26, 2008 AG1, 162510
639Dresden Obs. in Germany, 2 in MPEC 2008-C23 -- 2008 BD15, 2008 AF4
J36El Olivo Obs. in Spain, 3 in MPEC 2008-C22 -- 180P, 29P, 17P
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-C23 -- 2008 BD15
B21Gaisberg Obs. in Austria, 4 in MPECs 2008-C24, 2008-C27, 2008-C28 & 2008-C29 -- 2008 CQ1, 2008 CN1, 2008 CM1, 2008 CH1
372Geisei Obs. in Japan, 6 in MPEC 2008-C22 -- 93P, 50P, 46P, 29P, 17P, 8P
143Gnosca Obs. in Switzerland, 1 in MPEC 2008-C27 -- 2008 CM1
J95Great Shefford Obs. in England, 1 in MPEC 2008-C22 -- P/2007 VQ11
458Guadarrama Obs. in Spain, 2 in MPEC 2008-C22 -- 93P, 29P
442Gualba Obs. in Spain, 2 in MPEC 2008-C22 -- 29P, 17P
A17Guidestar Obs. in Germany, 4 in MPECs 2008-C23, 2008-C27 & 2008-C28 -- 2008 CN1, 2008 CM1, 2008 BD15, 2008 AF4
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-C22 -- 17P
D88Hiratsuka Obs., 4 in MPEC 2008-C22 -- C/2007 U1, P/2007 T6, P/2007 C2, C/2006 S5
A35Hormersdorf Obs. in Germany, 1 in MPEC 2008-C23 -- 2008 BD15
B15Inastars Obs. in Germany, 4 in MPECs 2008-C23 & 2008-C27 -- 2008 CM1, 173561, 138013, 137924
J39Ingenio Obs. in the Canary Islands, 2 in MPEC 2008-C22 -- C/2007 T5, 173P
G92Jarnac Obs. in Arizona, 1 in MPEC 2008-C23 -- 7889
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-C21 -- C/2008 C1
246KLENOT in the Czech Republic, 17 in MPECs 2008-C23, 2008-C24, 2008-C25, 2008-C27, 2008-C28, 2008-C29, 2008-C30, 2008-C31 & 2008-C32 -- 2008 CT1, 2008 CS1, 2008 CR1, 2008 CQ1, 2008 CP, 2008 CO, 2008 CN1, 2008 CM1, 2008 CM, 2008 CJ1, 2008 CH1, 2008 BT18, 2008 BD15, 2008 AV28, 2008 AF4, 2007 RT147, 2005 NB7
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2008-C22 -- 26P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2008-C22 -- C/2007 W3
704LINEAR in New Mexico, 30 in MPECs 2008-C21, 2008-C22, 2008-C23, 2008-C26, 2008-C28 & 2008-C32 -- 2008 CT1, 2008 CQ, 2008 CN1, 2008 CL1, C/2008 C1, 2008 AU26, 2008 AM33, C/2007 W1, P/2007 T6, C/2007 S2, P/2007 H1, P/2007 C2, C/2006 W3, 1998 BB10, 86324, 170891, 154347, 11398, 9400, 4450, 191P, 188P, 173P, 139P, 128P, 117P, 113P, 110P, 70P, 17P
J76La Murta Obs. in Spain, 3 in MPEC 2008-C22 -- 46P, 29P, 8P
J38La Vara Obs. in Spain, 7 in MPEC 2008-C22 -- C/2006 W3, 117P, 110P, 93P, 46P, 29P, 17P
B57Laietania Obs., 1 in MPEC 2008-C22 -- 110P
J59Linceo Obs. in Spain, 1 in MPEC 2008-C22 -- C/2006 S5
A80Lindenberg Obs. in Germany, 5 in MPECs 2008-C23, 2008-C26 & 2008-C28 -- 2008 CN1, 2008 CL1, 2008 BH16, 2008 BD15, 2008 AF4
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2008-C22 -- C/2006 S5
A06Mataro Obs. in Spain, 4 in MPEC 2008-C22 -- P/2007 H1, 50P, 46P, 17P
711McDonald Obs. in Texas, 4 in MPECs 2008-C26, 2008-C27, 2008-C28 & 2008-C30 -- 2008 CR1, 2008 CN1, 2008 CM1, 2008 CL1
118Modra Obs. in Slovakia, 3 in MPECs 2008-C26, 2008-C27 & 2008-C28 -- 2008 CN1, 2008 CM1, 2008 CL1
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-C22 -- C/2007 W3
213Montcabre Obs. in Spain, 4 in MPEC 2008-C22 -- P/2007 T6, 29P, 17P, 7P
945Monte Deva Obs. in Spain, 9 in MPEC 2008-C22 -- C/2007 B2, C/2006 W3, C/2006 S5, 124P, 110P, 93P, 46P, 29P, 17P
474Mt. John Obs. in New Zealand, 1 in MPEC 2008-C30 -- 2008 CR1
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-C25, 2008-C28 & 2008-C29 -- 2008 CQ1, 2008 CN1, 2008 CJ1
J93Mt. Tuffley Obs. in England, 2 in MPEC 2008-C22 -- 110P, 93P
J78Murcia Obs. in Spain, 3 in MPEC 2008-C22 -- C/2006 S5, 110P, 29P
A13Naef Obs. in Switzerland, 1 in MPEC 2008-C23 -- 2008 BT18
J47Nazaret Obs. in Spain, 10 in MPECs 2008-C20 & 2008-C22 -- P/2008 A2, P/2007 T6, C/2007 T5, 194P, 65P, 50P, 29P, 17P, 8P, 7P
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-C21 -- C/2008 C1
A32Panker Obs. in Germany, 1 in MPEC 2008-C23 -- 1620
B49Paus Obs. in Spain, 2 in MPEC 2008-C22 -- 180P, 108P
J52Pinsoro Obs. in Spain, 5 in MPEC 2008-C22 -- C/2006 S5, 93P, 50P, 29P, 17P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-C21 -- C/2008 C1
D90RAS Obs. Moorook, 1 in MPEC 2008-C22 -- C/2007 T1
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2008-C26, 2008-C27, 2008-C28 & 2008-C30 -- 2008 CR1, 2008 CN1, 2008 CM1, 2008 CL1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-C20 -- P/2008 A2
233San Vito Obs. in Italy, 1 in MPEC 2008-C22 -- 93P
204Schiaparelli Obs. in Italy, 32 in MPECs 2008-C18, 2008-C20 & 2008-C22 -- P/2008 A2, C/2007 Y1, P/2007 VQ11, C/2007 U1, C/2007 S2, P/2007 H1, C/2007 D3, P/2007 C2, C/2006 W3, C/2006 S5, C/2006 S3, C/2006 K3, C/2006 K1, P/2004 F3, 195P, 194P, 192P, 191P, 188P, 173P, 150P, 136P, 117P, 110P, 108P, 93P, 65P, 50P, 46P, 29P, 17P, 8P
510Siegen Obs. in Germany, 1 in MPEC 2008-C22 -- 124P
071Smolyan Obs. in Bulgaria, 9 in MPEC 2008-C22 -- C/2007 W1, P/2007 H1, C/2007 G1, C/2007 B2, C/2005 L3, 124P, 29P, 17P, 8P
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2008-C23, 2008-C24 & 2008-C29 -- 2008 CQ1, 2008 CH1, 2004 CR2, 22099, 11398
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2008-C23 & 2008-C24 -- 2008 CH1, 2008 AF4, 2005 YV128, 2003 CA
A97Stammersdorf Obs. in Austria, 3 in MPECs 2008-C21 & 2008-C22 -- C/2008 C1, 29P, 17P
B30Szamotuly-Galowo Obs. in Poland, 2 in MPEC 2008-C22 -- C/2007 G1, C/2005 L3
629Szeged Obs. in Hungary, 6 in MPEC 2008-C22 -- C/2006 S5, 110P, 93P, 50P, 46P, 29P
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-C21 -- C/2008 C1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-C28 -- 2008 CN1
H53Thompsonville Obs. in Illinois, 1 in MPEC 2008-C22 -- 29P
D70Tosa Obs., 2 in MPECs 2008-C21 & 2008-C22 -- C/2008 C1, 17P
J35Tucci Obs. in Spain, 2 in MPEC 2008-C22 -- 110P, 8P
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2008-C22 -- C/2006 S5, 110P
C42Xingming Obs. in China, 1 in MPEC 2008-C21 -- C/2008 C1

Impact Risk Monitoring  on 4 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2353 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of 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 CS1JPL Sentry23532013-2106424.3e-08-4.36-4.490JPL: "Analysis based on 15 observations spanning .56140 days (2008-Feb-03.50178 to 2008-Feb-04.06318)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2008 CKJPL Sentry1547R E M O V E DJPL: Risk listing removed at 1046 UTC.
2008 BT18NEODyS15482011-2090228.43e-08-3.86-4.800NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2008/01/31.414 to 2008/02/03.969."
JPL Sentry15472011-2105271.0e-07-3.75-4.590JPL: "Analysis based on 32 observations spanning 3.5553 days (2008-Jan-31.41308 to 2008-Feb-03.96841)." Diameter approximately 0.750 km. from mean, weighted H=18.3.
2008 BD15JPL Sentry1547R E M O V E DJPL: Risk listing removed at 1131 UTC.
2008 AF4NEODyS15482078-2090166.81e-06-2.86-3.120NEODyS: "Based on 373 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/03.953."
JPL Sentry15472078-2105383.5e-05-2.18-2.690JPL: "Analysis based on 369 observations spanning 24.555 days (2008-Jan-10.39652 to 2008-Feb-03.95181)." Diameter approximately 0.380 km. from mean, weighted H=19.8.

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 4 February '08

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

2353Noted that JPL Sentry has posted 2008 CS1 as an impact risk - see above
2333Grabbed MPEC 2008-C32 - 2008 CT1 - see above
Noted Radar Astrometry database addition - see above
2001Grabbed MPEC 2008-C29 - 2008 CQ1 - see above
Grabbed MPEC 2008-C30 - 2008 CR1 - see above
Grabbed MPEC 2008-C31 - 2008 CS1 - see above
1551Grabbed MPEC 2008-C24 - 2008 CH1 - see above
Grabbed MPEC 2008-C26 - 2008 CL1 - see above
Grabbed MPEC 2008-C27 - 2008 CM1 - see above
Grabbed MPEC 2008-C28 - 2008 CN1 - see above
1548Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 BT18 risk assessment - see above
Grabbed MPEC 2008-C23 - Daily Orbit Update - see above
1547Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has removed 2008 BD15 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 BT18 risk assessment - see above
Noted that JPL Sentry has removed 2008 CK as an impact risk - see above
Grabbed MPEC 2008-C25 - 2008 CJ1 - see above
0129Grabbed MPEC 2008-C22 - Observations of Comets - see above
0054Grabbed MPEC 2008-C20 - Comet P/2008 A2 (LINEAR) - see above
Grabbed MPEC 2008-C21 - Comet C/2008 C1 (Chen-Gao) - see above
0022Grabbed MPEC 2008-C18 - Comet C/2007 Y1 (LINEAR) - see above
Grabbed MPEC 2008-C19 - Comet C/2008 A1 (McNaught) - see above