Bright meteor Weds. night 
over Ontario. Credit: UWO.

This image from 10:59pm EST on March 5th (0359 UTC) comes from a network of all-sky cameras that caught this fireball for the University of Western Ontario Physics and Astronomy Department. It's expected that one or more meteorites survived in the Parry Sound area from this event. See more info. Credit: UWO.


Contents  on 7 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 7 March '08

The MPC's NEO Confirmation Page has 12 listings: 4 new, 8 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and eight updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 21 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 March '08

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-E65 - "20:06 UT" - 2008 ER7


MPEC 2008-E64 - "19:34 UT" - 2008 EQ7


MPEC 2008-E63 - "19:28 UT" - 2008 EP7


MPEC 2008-E62 - "19:17 UT" - 2008 EO7


MPEC 2008-E61 - "18:46 UT" - 2008 EN7


MPEC 2008-E60 - "18:42 UT" - 2008 EM7


<< DOU on 7 Mar. '08 >>  MPEC 2008-E59 - "07:08 UT" - Daily Orbit Update

Observers  on 7 March '08

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-E59 -- 2008 EO6, 2008 EN6
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2008-E59 -- 2002 TD66, 1036
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2008-E59, 2008-E61 & 2008-E64 -- 2008 EQ7, 2008 EN7, 2008 DG5, 2008 BT18, 2008 AF4, 2006 BG55, 2003 TM1, 53319, 35107, 164222, 163696, 163249, 162038, 5587, 1685
639Dresden Obs. in Germany, 3 in MPEC 2008-E59 -- 2008 CN1, 2008 CL1, 2006 DU62
651Grasslands Obs. in Arizona, 3 in MPECs 2008-E61, 2008-E63 & 2008-E64 -- 2008 EQ7, 2008 EP7, 2008 EN7
240Herrenberg Obs. in Germany, 1 in MPEC 2008-E59 -- 2008 CN1
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-E59 -- 2008 EO6
246KLENOT in the Czech Republic, 8 in MPECs 2008-E59, 2008-E60, 2008-E61, 2008-E63, 2008-E64 & 2008-E65 -- 2008 ER7, 2008 EQ7, 2008 EP7, 2008 EN7, 2008 EM7, 2008 EK1, 2008 EJ, 2008 DJ
118Modra Obs. in Slovakia, 1 in MPEC 2008-E64 -- 2008 EQ7
474Mt. John Obs. in New Zealand, 3 in MPEC 2008-E59 -- 2008 EK1, 2008 DL5, 2007 EP88
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPECs 2008-E59, 2008-E60, 2008-E61, 2008-E62, 2008-E63, 2008-E64 & 2008-E65 -- 2008 EV5, 2008 ES, 2008 ER7, 2008 EQ7, 2008 EP7, 2008 EO7, 2008 EN7, 2008 EM7, 2008 EM, 2008 EE5, 2008 CM116, 2008 CC175, 2007 TG8, 2005 GP21, 2002 CF26, 2000 RN12, 164222, 154020, 3552
A13Naef Obs. in Switzerland, 1 in MPEC 2008-E59 -- 2005 EA
941Pla D'Arguines Obs. in Spain, 2 in MPEC 2008-E59 -- 2003 DC14, 2000 XK44
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2008-E59 -- 2008 EY5, 2008 EJ1, 2007 VR183, 1999 SO5
H85Silver Spring Obs. in Maryland, 2 in MPEC 2008-E59 -- 2008 EK1, 2008 DE
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2008-E59, 2008-E62 & 2008-E65 -- 2008 ER7, 2008 EO7, 2008 DK5, 2008 CZ21, 2008 CJ116, 2008 AL33, 2006 BA148, 9162
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-E59, 2008-E60, 2008-E62 & 2008-E65 -- 2008 ER7, 2008 EO7, 2008 EM7, 2008 EK1, 2008 DW, 2008 DL5, 2008 DH23, 2004 FN32, 2003 ED50

Impact Risk Monitoring  on 7 March '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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 ER7JPL Sentry22592011-20541099.5e-07-2.66-3.120JPL: "Analysis based on 15 observations spanning 1.0499 days (2008-Mar-06.33608 to 2008-Mar-07.38598)." Diameter approximately 0.366 km. from mean, weighted H=19.9.
2008 EM7JPL Sentry22012014-21071466.3e-07-4.06-4.590JPL: "Analysis based on 22 observations spanning 1.0957 days (2008-Mar-06.25767 to 2008-Mar-07.35332)." Diameter approximately 0.170 km. from mean, weighted H=21.5.
2008 EL6NEODyS15382082-209021.21e-08-5.80-5.800NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/03/05.109 to 2008/03/06.529."
2008 EV5JPL Sentry15382022-2103162.6e-08-5.37-5.960JPL: "Analysis based on 21 observations spanning 1.9851 days (2008-Mar-04.21432 to 2008-Mar-06.19939)." Diameter approximately 0.325 km. from mean, weighted H=20.1.
NEODyS1538R E M O V E D
2008 EE5JPL Sentry15382037-203931.1e-09-5.55-5.890JPL: "Analysis based on 19 observations spanning 2.0236 days (2008-Mar-04.17185 to 2008-Mar-06.19547)." Diameter approximately 0.540 km. from mean, weighted H=19.0.
NEODyS1538R E M O V E D
2008 AF4JPL Sentry17562078-210084.3e-05-2.04-2.151JPL: "Analysis based on 570 observations spanning 55.459 days (2008-Jan-10.39652 to 2008-Mar-05.85535)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS15382078-208933.25e-05-2.15-2.151NEODyS: "Based on 574 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/05.856. NOTE: The Virtual Impactor in 2089/01/09.478 ... 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 7 March '08

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

2259Noted that JPL Sentry has posted 2008 ER7 as an impact risk - see above
2201Noted that JPL Sentry has posted 2008 EM7 as an impact risk - see above
2030Grabbed MPEC 2008-E65 - 2008 ER7 - see above
1958Grabbed MPEC 2008-E61 - 2008 EN7 - see above
Grabbed MPEC 2008-E62 - 2008 EO7 - see above
Grabbed MPEC 2008-E63 - 2008 EP7 - see above
Grabbed MPEC 2008-E64 - 2008 EQ7 - see above
1859Grabbed MPEC 2008-E60 - 2008 EM7 - see above
1756Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1539Grabbed MPEC 2008-E59 - Daily Orbit Update - see above
1538Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EE5 risk assessment - see above
Noted that NEODyS has removed 2008 EE5 as an impact risk - see above
Noted that NEODyS has posted 2008 EL6 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 EV5 risk assessment - see above
Noted that NEODyS has removed 2008 EV5 as an impact risk - see above