Contents  on 17 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 17 March '08

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of seven 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 17 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-F06 - "17:18 UT" - 2008 ER90


<< DOU on 17 Mar. '08 >>  MPEC 2008-F05 - "06:10 UT" - Daily Orbit Update


MPEC 2008-F04 - "01:56 UT" - Observations of Comets


MPEC 2008-F03 - "01:46 UT" - Comet C/2008 C1 (Chen-Gao)


MPEC 2008-F02 - "01:39 UT" - Comet C/2008 A1 (McNaught)

Observers  on 17 March '08

A total of 47 observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 2 in MPECs 2008-F02 & 2008-F04 -- C/2008 A1, C/2006 Q1
349Ageo Obs. in Japan, 9 in MPEC 2008-F04 -- C/2007 B2, C/2006 W3, 124P, 110P, 74P, 70P, 65P, 46P, 26P
J32Aljaraque Obs., 2 in MPEC 2008-F05 -- 1685, 1036
B37Ametlla del Valles Obs. in Spain, 5 in MPEC 2008-F04 -- C/2007 M2, C/2007 B2, C/2002 VQ94, 70P, 29P
J51Atlante Obs. in the Canary Islands, 7 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 M2, C/2006 W3, 124P, 46P, 26P, 17P
467Auckland Obs. in New Zealand, 4 in MPECs 2008-F02 & 2008-F04 -- C/2008 A1, C/2006 U6, C/2006 Q1, 8P
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-F04 -- 110P
235CAST Obs. in Italy, 9 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 B2, C/2006 W3, C/2006 S5, 110P, 93P, 46P, 29P, 17P
J79Calarreona Obs. in Spain, 7 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, 110P, 93P, 50P, 46P, 29P, 17P
J96Cantabria Obs. in Spain, 7 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 M2, C/2007 B2, C/2006 S5, 70P, 46P, 17P
B20Carmelita Obs. in Spain, 6 in MPEC 2008-F04 -- C/2007 W1, C/2007 B2, C/2006 S5, 180P, 124P, 29P
703Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2008-F04 -- P/2008 E2, C/2007 M2, C/2007 B2, P/2005 SB216, 183P, 180P, 172P, 93P, 70P, 65P, 22P, 7P
A77Chante-Perdrix Obs. in France, 4 in MPEC 2008-F04 -- P/2005 SB216, C/2003 WT42, 65P, 17P
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2008-F04 -- C/2007 B2, 124P
J36El Olivo Obs. in Spain, 1 in MPEC 2008-F04 -- 17P
442Gualba Obs. in Spain, 2 in MPEC 2008-F04 -- 46P, 29P
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-F04 -- C/2007 W1, C/2007 M2
J39Ingenio Obs. in the Canary Islands, 2 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, 46P
415Kambah Obs. in the Australian Capital Territory, 8 in MPECs 2008-F02 & 2008-F04 -- C/2008 A1, C/2007 Y2, C/2007 W1, C/2007 D1, C/2007 B2, C/2006 Q1, 26P, 8P
585Kiev Comet Station in the Ukraine, 2 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 T5
704LINEAR in New Mexico, 8 in MPEC 2008-F04 -- C/2007 M2, P/2005 SB216, 180P, 172P, 70P, 50P, 22P, 17P
844Los Molinos Obs. in Uruguay, 4 in MPECs 2008-F04 & 2008-F05 -- C/2007 W1, C/2006 Q1, 21088, 8P
130Lumezzane Obs. in Italy, 4 in MPEC 2008-F04 -- P/2008 E2, 65P, 22P, 7P
J40Malaga Obs. in Spain, 2 in MPEC 2008-F04 -- C/2007 T5, 180P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F06 -- 2008 ER90
118Modra Obs. in Slovakia, 1 in MPEC 2008-F04 -- C/2002 VQ94
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-F04 -- 46P
213Montcabre Obs. in Spain, 2 in MPEC 2008-F04 -- 29P, 7P
945Monte Deva Obs. in Spain, 4 in MPEC 2008-F04 -- C/2007 W1, C/2007 B2, 180P, 46P
900Moriyama Obs. in Japan, 13 in MPECs 2008-F02, 2008-F03 & 2008-F04 -- P/2008 E2, C/2008 C1, C/2008 A1, C/2007 W1, C/2007 T1, C/2007 M2, C/2007 B2, C/2006 W3, 180P, 124P, 46P, 29P, 26P
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2008-F04 -- C/2007 B2, 74P, 70P
J47Nazaret Obs. in Spain, 8 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 W1, 183P, 180P, 46P, 29P, 22P, 17P
423North Ryde Obs. in New South Wales, 5 in MPECs 2008-F02 & 2008-F04 -- C/2008 A1, C/2007 Y2, C/2007 T1, C/2006 Q1, C/2006 K4
B49Paus Obs. in Spain, 2 in MPEC 2008-F04 -- C/2007 D1, 22P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2008-F05 -- 2007 TG8, 2007 RX19, 2006 DU62, 2005 EK70, 2005 BE2, 2002 TD66, 2000 DP107, 68359, 22099, 170891, 4954, 3288
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2008-F04 -- C/2007 M2
473Remanzacco Obs. in Italy, 1 in MPEC 2008-F04 -- C/2006 S5
A41Rezman Obs. in Slovenia, 5 in MPEC 2008-F04 -- C/2007 M2, C/2007 B2, 183P, 180P, 124P
939Rodeno Obs. in Spain, 9 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 W3, 180P, 124P, 93P, 29P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2008-F05 -- 2008 AT28
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-F05 -- 2008 EM7, 2008 ED69, 2008 EC69, 2008 DW
A97Stammersdorf Obs. in Austria, 3 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, 29P, 17P
B30Szamotuly-Galowo Obs. in Poland, 10 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2006 W3, P/2005 SB216, 183P, 180P, 124P, 93P, 65P, 22P, 7P
A55Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-F04 -- C/2003 WT42
J70Vega del Thader Obs. in Spain, 2 in MPEC 2008-F04 -- 93P, 46P
C42Xingming Obs. in China, 1 in MPEC 2008-F03 -- C/2008 C1
367Yatsuka Obs., 10 in MPECs 2008-F03 & 2008-F04 -- C/2008 C1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 S5, 180P, 124P, 110P, 46P, 29P

Impact Risk Monitoring  on 17 March '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 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 ED69NEODyS1429205312.16e-11-6.21-6.210NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/03/11.497 to 2008/03/16.414."
2008 EC69JPL Sentry14292018-21041182.4e-07-2.61-3.450JPL: "Analysis based on 37 observations spanning 4.9009 days (2008-Mar-11.49608 to 2008-Mar-16.39694)." Diameter approximately 1.264 km. from mean, weighted H=17.1.
NEODyS14292018-20901172.32e-07-2.61-3.440NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2008/03/11.497 to 2008/03/16.398."
2008 EM7JPL Sentry1429R E M O V E DJPL: Risk listing removed at 1007 UTC.
2008 AF4JPL Sentry16392078-210085.3e-05-1.94-2.021JPL: "Analysis based on 584 observations spanning 64.725 days (2008-Jan-10.39652 to 2008-Mar-15.1213)." Diameter approximately 0.390 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 17 March '08

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

1740Grabbed MPEC 2008-F06 - 2008 ER90 - see above
1639Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1429Noted that JPL Sentry has updated its 2008 EC69 risk assessment - see above
Noted that NEODyS has updated its 2008 EC69 risk assessment - see above
Noted that NEODyS has updated its 2008 ED69 risk assessment - see above
Noted that JPL Sentry has removed 2008 EM7 as an impact risk - see above
Grabbed MPEC 2008-F05 - Daily Orbit Update - see above
0231Grabbed MPEC 2008-F02 - Comet C/2008 A1 (McNaught) - see above
Grabbed MPEC 2008-F03 - Comet C/2008 C1 (Chen-Gao) - see above
Grabbed MPEC 2008-F04 - Observations of Comets - see above