Sky view with 2008 EF32 on March 10th 
at 0000 UTC. A/CC illustration.

Tiny 2008 EF32 came from sunward and flew through the Earth-Moon system, passing the Moon Sunday at one-quarter lunar distance (LD) and whipping past Earth yesterday at a distance presently calculated at 0.17 LD. Estimated to be roughly four meters wide, it was first noticed at 0838 UTC this morning by the Mt. Lemmon Survey. See today's MPEC 2008-E91 below and more details. This A/CC illustration depicts the sky at 0000 UTC yesterday.


Contents  on 11 March '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 11 March '08

The MPC's NEO Confirmation Page has 25 listings: 17 new, 8 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seventeen new and eight updated listings. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 40 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 11 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-E97 - "23:44 UT" - 2008 EM68


MPEC 2008-E96 - "23:40 UT" - 2008 EL68


MPEC 2008-E95 - "23:13 UT" - 2008 EK68


MPEC 2008-E94 - "23:06 UT" - 2008 EJ68


MPEC 2008-E93 - "22:10 UT" - 2007 UQ13


MPEC 2008-E92 - "17:05 UT" - 2008 EG32


MPEC 2008-E91 - "16:58 UT" - 2008 EF32


MPEC 2008-E90 - "16:53 UT" - 2008 EC32


MPEC 2008-E89 - "16:47 UT" - 2008 EB32


MPEC 2008-E88 - "16:43 UT" - 2008 EA32


<< DOU on 11 Mar. '08 >>  MPEC 2008-E87 - "06:09 UT" - Daily Orbit Update

Observers  on 11 March '08

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 3 in MPECs 2008-E87, 2008-E88 & 2008-E89 -- 2008 ED8, 2008 EB32, 2008 EA32
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2008-E87, 2008-E88, 2008-E90 & 2008-E92 -- 2008 ES, 2008 EP7, 2008 EK1, 2008 EJ, 2008 EG32, 2008 EC32, 2008 EA32, 2008 CZ118, 2008 CR118, 2008 CL72, 2008 AF4, 2007 TG8, 2002 CF26, 2000 DP107, 85990, 22099, 21277, 164202, 1864
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E87 -- 162038
H51Greiner Research Obs. (GRO) in Wisconsin, 6 in MPEC 2008-E87 -- 2008 DK5, 2005 EK70, 138127, 6037, 5131, 1685
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-E87 -- 2008 CL1, 2005 EK70
701Junk Bond Obs. in Arizona, 2 in MPEC 2008-E87 -- 2008 EM9, 2008 EF9
046Klet Obs. in the Czech Republic, 4 in MPEC 2008-E87 -- 2008 EL, 2008 DK5, 2008 CD22, 2005 EY169
G88LAMP Obs. in Arizona, 1 in MPEC 2008-E87 -- 2008 EL6
704LINEAR in New Mexico, 20 in MPECs 2008-E87 & 2008-E89 -- 2008 EP, 2008 EF9, 2008 EB32, 2008 DK5, 2008 CN1, 2005 EY169, 2005 EK70, 2004 CR2, 2002 TD66, 96189, 54686, 175921, 170891, 162038, 138205, 138013, 9400, 5587, 1685, 1620
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2008-E87 -- 2007 UQ13, 2007 PQ9
118Modra Obs. in Slovakia, 1 in MPEC 2008-E88 -- 2008 EA32
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2008-E87, 2008-E88, 2008-E89, 2008-E90, 2008-E91, 2008-E92, 2008-E94, 2008-E95, 2008-E96 & 2008-E97 -- 2008 EN6, 2008 EM68, 2008 EL68, 2008 EK68, 2008 EJ68, 2008 EG32, 2008 EF32, 2008 EC32, 2008 EB32, 2008 EA32, 2008 AU26, 2008 AT28, 2007 QE3, 177049, 142561, 719
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-E93 -- 2007 UQ13
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2008-E87 -- 2005 TU45, 2005 EK70
649Powell Obs. in Kansas, 1 in MPEC 2008-E90 -- 2008 EC32
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2008-E88, 2008-E89 & 2008-E90 -- 2008 EC32, 2008 EB32, 2008 EA32
E12Siding Spring Survey (SSS) in New South Wales, 11 in MPEC 2008-E87 -- 2008 EY5, 2008 EP6, 2008 EM9, 2008 EJ1, 2008 EE9, 2008 CG119, 2003 GW, 1999 TA10, 86667, 172034, 1916
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-E87 -- 2008 CS116, 2008 BC22, 175189, 138205, 13553, 9162
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-E90 -- 2008 EC32
A97Stammersdorf Obs. in Austria, 2 in MPEC 2008-E87 -- 2008 ED8, 1620
A92Urseanu Obs. in Romania, 2 in MPEC 2008-E87 -- 2008 CL1, 2002 TD66

Impact Risk Monitoring  on 11 March '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2354 and JPL at 2355 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 EG32JPL Sentry23552022-21071471.8e-07-7.86-8.550JPL: "Analysis based on 12 observations spanning .05654 days (2008-Mar-11.38484 to 2008-Mar-11.44138)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2008 EF32JPL Sentry19302011-208357.3e-08-9.02-9.410JPL: "Analysis based on 8 observations spanning .12271 days (2008-Mar-11.35979 to 2008-Mar-11.4825)." Diameter approximately 0.004 km. from mean, weighted H=29.4.
2008 EA9NEODyS17482041-2089332.19e-05-6.30-6.920NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/10.408."
2008 AF4JPL Sentry15142078-209964.3e-05-2.03-2.101JPL: "Analysis based on 579 observations spanning 58.874 days (2008-Jan-10.39652 to 2008-Mar-09.27031)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS14482078-208933.57e-05-2.11-2.111NEODyS: "Based on 583 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/09.271. NOTE: The Virtual Impactor in 2089/01/09.479 ... is rated as Torino Scale 1."

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 11 March '08

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

2355Noted that JPL Sentry has posted 2008 EG32 as an impact risk - see above
2354Grabbed MPEC 2008-E94 - 2008 EJ68 - see above
Grabbed MPEC 2008-E95 - 2008 EK68 - see above
Grabbed MPEC 2008-E96 - 2008 EL68 - see above
Grabbed MPEC 2008-E97 - 2008 EM68 - see above
2237Grabbed MPEC 2008-E93 - 2007 UQ13 - see above
1930Noted that JPL Sentry has posted 2008 EF32 as an impact risk - see above
1748Noted that NEODyS has posted 2008 EA9 as an impact risk - see above
Grabbed MPEC 2008-E88 - 2008 EA32 - see above
Grabbed MPEC 2008-E89 - 2008 EB32 - see above
Grabbed MPEC 2008-E90 - 2008 EC32 - see above
Grabbed MPEC 2008-E91 - 2008 EF32 - see above
Grabbed MPEC 2008-E92 - 2008 EG32 - see above
1514Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1448Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Grabbed MPEC 2008-E87 - Daily Orbit Update - see above