Contents  on 1 January '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 this year 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 1 January '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 2105 UTC when the database was dated 1 Jan.

NEOCP Activity  on 1 January '08

The MPC's NEO Confirmation Page has 20 listings: 4 new, 16 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and sixteen updated listings. Of these, six were "one nighters." The Tracking News counted a total of 22 objects listed on the NEOCP at some point on this day.

New MPECs  on 1 January '08

Minor Planet Electronic Circulars

There were four MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-A04 - "15:58 UT" - 2007 RM283, 2007 TB418, 2007 TC418, 2007 TD418, 2007 VJ302, 2007 VK302


MPEC 2008-A03 - "15:43 UT" - 2007 TA418


MPEC 2008-A02 - "15:31 UT" - 2007 TZ417


<< DOU on 1 Jan. '08 >>  MPEC 2008-A01 - "07:08 UT" - Daily Orbit Update

Observers  on 1 January '08

Nineteen observing facilities appeared in this day's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2007 XH16
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-A01 -- 2007 XT3, 2007 XF18, 2007 VX7, 2007 VH186, 2007 VH184
B09Capannoli Obs. in Italy, 1 in MPEC 2008-A01 -- 2007 YZ
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-A01 -- 2007 YF1, 2007 TG15, 2003 AD1, 22099, 17182, 170502, 152742, 138971, 3288
807Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2008-A02, 2008-A03 & 2008-A04 -- 2007 VK302, 2007 VJ302, 2007 TZ417, 2007 TD418, 2007 TC418, 2007 TB418, 2007 TA418, 2007 RM283
448Desert Moon Obs. in New Mexico, 4 in MPEC 2008-A01 -- 2007 YK, 2007 VW137, 2007 TU24, 2007 SV11
B34Green Island Obs. in Cyprus, 5 in MPEC 2008-A01 -- 2007 WF55, 2007 TG15, 2005 XD1, 2003 BH84, 1993 TQ2
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-A01 -- 2007 YZ, 2005 WJ56
704LINEAR in New Mexico, 8 in MPEC 2008-A01 -- 2007 TG15, 1989 AZ, 68359, 34613, 18736, 153591, 136793, 9172
J76La Murta Obs. in Spain, 2 in MPEC 2008-A01 -- 68359, 66272
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-A01 -- 2007 WD5
474Mt. John Obs. in New Zealand, 2 in MPEC 2008-A01 -- 2007 XO3, 2007 VC138
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2008-A01 -- 19764, 170903, 162038, 138947
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2008-A01 -- 2007 YZ, 2007 YH, 2007 XH16, 2007 WF55, 2007 VH3, 2007 SP6, 2005 XK8, 2005 XD1, 2005 WJ56, 2005 TU45, 1993 TQ2, 90403, 68359, 138947, 136793
233San Vito Obs. in Italy, 2 in MPEC 2008-A01 -- 2007 XH16, 86324
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-A01 -- 2005 NB7
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-A01 -- 2102
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-A01 -- 2005 YY128, 68063, 34613, 172718
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2008-A01 -- 2007 YG, 2007 YB2, 2007 XK11, 2007 XB10, 2006 HX5, 2006 EV52, 2005 BE2, 2004 EO20

Impact Risk Monitoring  on 1 January '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.
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
2007 YB2JPL Sentry21052043-209823.3e-08-3.99-4.000JPL: "Analysis based on 58 observations spanning 13.068 days (2007-Dec-18.34552 to 2007-Dec-31.41369)." Diameter approximately 0.770 km. from mean, weighted H=18.2.
NEODyS1550204313.67e-08-3.96-3.960NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2007/12/18.346 to 2007/12/31.414."

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 1 January '08

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

2105Noted that JPL Sentry has updated its 2007 YB2 risk assessment - see above
Noted Radar Astrometry database addition
1621Grabbed MPEC 2008-A04 - 2007 RM283, 2007 TB418, 2007 TC418, 2007 TD418, 2007 VJ302, 2007 VK302 - see above
1551Grabbed MPEC 2008-A01 - Daily Orbit Update - see above
1550Noted that NEODyS has updated its 2007 YB2 risk assessment - see above
Grabbed MPEC 2008-A02 - 2007 TZ417 - see above
Grabbed MPEC 2008-A03 - 2007 TA418 - see above