Contents  on 7 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 7 February '08

The MPC's NEO Confirmation Page has 11 listings: 4 new, 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and seven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of seventeen 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 7 February '08

Minor Planet Electronic Circulars

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


MPEC 2008-C38 - "14:53 UT" - 2008 CA5


MPEC 2008-C37 - "14:49 UT" - 2008 CZ4


MPEC 2008-C36 - "14:45 UT" - 2008 CY4


<< DOU on 7 Feb. '08 >>  MPEC 2008-C35 - "07:09 UT" - Daily Orbit Update

Observers  on 7 February '08

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-C35 -- 2007 XP3
726Brainerd Obs. in Minnesota, 3 in MPEC 2008-C35 -- 2008 BD15, 2008 AF4, 2005 TU45
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-C35, 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CQ, 2008 CA5, 2008 BT18, 2008 BP16, 2008 AE, 2007 YK, 2000 DM1, 101869, 1864
448Desert Moon Obs. in New Mexico, 7 in MPEC 2008-C35 -- 2008 CO, 2008 CM, 2008 CG, 2008 BT18, 2008 BH16, 2008 AN33, 2007 VH3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-C35 -- 2007 TU24
143Gnosca Obs. in Switzerland, 6 in MPEC 2008-C35 -- 2008 CQ, 2008 CG, 2008 BT18, 2008 BD15, 2007 US6, 2007 TU24
651Grasslands Obs. in Arizona, 3 in MPECs 2008-C36, 2008-C37 & 2008-C38 -- 2008 CZ4, 2008 CY4, 2008 CA5
246KLENOT in the Czech Republic, 1 in MPEC 2008-C35 -- 2008 CK
704LINEAR in New Mexico, 12 in MPECs 2008-C35, 2008-C36 & 2008-C37 -- 2008 CZ4, 2008 CY4, 2008 CQ, 2008 CG, 2008 BT18, 2000 DP107, 2000 DM1, 66959, 173561, 163696, 154589, 1862
699LONEOS in Arizona, 2 in MPEC 2008-C35 -- 173561, 4450
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-C35 -- 2008 BD15, 2004 AR1, 1993 TQ2
711McDonald Obs. in Texas, 6 in MPEC 2008-C35 -- 2008 CN1, 2008 CL1, 2008 AN33, 2007 VY7, 2002 CF26, 170891
474Mt. John Obs. in New Zealand, 4 in MPECs 2008-C35, 2008-C37 & 2008-C38 -- 2008 CZ4, 2008 CG, 2008 CA5, 2008 AH33
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CA5
473Remanzacco Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2008-C35, 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CH1, 2008 CA5, 2008 BT18, 2008 BO16, 2008 AX1, 2008 AT28, 2008 AK33, 2008 AF4, 2007 VG184, 2007 UA2, 2007 RA20, 2006 WR1, 2004 VA64, 2002 AJ129, 1997 XV11
629Szeged Obs. in Hungary, 1 in MPEC 2008-C35 -- 2007 TU24
6735Jim Young via Table Mtn. Obs. in southern California, 6 in MPECs 2008-C35, 2008-C36 & 2008-C37 -- 2008 CZ4, 2008 CY4, 2008 CQ, 2008 CP, 2008 CG, 2008 BT18
0125Peter De Cat via Uccle Obs. in Belgium, 1 in MPEC 2008-C35 -- 9172
G72University Hills Obs. in southern California, 3 in MPEC 2008-C35 -- 2008 BD15, 2008 AF4, 2007 TG8
A48Verona Obs. in Italy, 2 in MPEC 2008-C35 -- 2008 BH16, 2008 BD15

Impact Risk Monitoring  on 7 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 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 CA5JPL Sentry17592054-206624.1e-10-6.60-6.740JPL: "Analysis based on 25 observations spanning 1.0329 days (2008-Feb-06.48341 to 2008-Feb-07.51627)." Diameter approximately 0.370 km. from mean, weighted H=19.8.
2008 BO16JPL Sentry16582045-206532.2e-06-4.14-4.140JPL: "Analysis based on 30 observations spanning 6.9198 days (2008-Jan-30.38083 to 2008-Feb-06.30068)." Diameter approximately 0.088 km. from mean, weighted H=22.9.
NEODyS1607204512.11e-06-4.15-4.150NEODyS: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2008/01/30.382 to 2008/02/06.301."
2008 AF4NEODyS16072075-2090177.58e-06-2.80-3.060NEODyS: "Based on 402 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/07.229."
JPL Sentry16062078-2105373.9e-05-2.12-2.760JPL: "Analysis based on 398 observations spanning 27.832 days (2008-Jan-10.39652 to 2008-Feb-07.22804)." Diameter approximately 0.380 km. from mean, weighted H=19.7.

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 7 February '08

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

1759Noted that JPL Sentry has posted 2008 CA5 as an impact risk - see above
1658Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above
1607Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 BO16 risk assessment - see above
Grabbed MPEC 2008-C35 - Daily Orbit Update - see above
1606Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Grabbed MPEC 2008-C36 - 2008 CY4 - see above
Grabbed MPEC 2008-C37 - 2008 CZ4 - see above
Grabbed MPEC 2008-C38 - 2008 CA5 - see above