Contents  on 3 April '09


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 3 April '09

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new listing. So far The Tracking News has counted a total of two listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 3 April '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 3 Apr. '09 >>  MPEC 2009-G08 - "06:13 UT" - Daily Orbit Update

MPEC 2009-G07 - "03:14 UT" - Comet C/2008 Q3 (Garradd)

Observers  on 3 April '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2009-G08 -- 2009 FO28, 2009 FL25, 2009 FJ1, 2009 EC1, 2009 DF1, 2009 DE47, 2009 DD1
467Auckland Obs. in New Zealand, 1 in MPEC 2009-G07 -- C/2008 Q3
300Bisei Spaceguard Center in Japan, 2 in MPEC 2009-G08 -- 2008 EV5, 2005 BC
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2009-G08 -- 2009 FL25, 2007 BT2, 2006 WZ2, 163696, 6050
113Drebach Obs. in Germany, 2 in MPEC 2009-G08 -- 2009 FA, 2008 SV11
J27El Guijo Obs. in Spain, 1 in MPEC 2009-G08 -- 143651
355Hadano Obs. in Japan, 2 in MPEC 2009-G08 -- 2007 UY1, 200754
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2009-G08 -- 2009 FA, 2009 DL1, 2008 WL60, 2008 SV11, 2007 BT2, 2006 GQ2, 2004 VC
B12Koschny Obs. in The Netherlands, 1 in MPEC 2009-G08 -- 5011
474Mt. John Obs. in New Zealand, 3 in MPEC 2009-G08 -- 2009 FQ, 2007 EL, 2002 LT38
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2009-G08 -- 2006 EV52, 207970, 162181, 152941
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-G08 -- 2009 FJ44
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-G08 -- 2008 WL60
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2009-G08 -- 2009 FG44, 1998 UN1
A20Sogel Obs. in Germany, 1 in MPEC 2009-G08 -- 2009 FL25
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2009-G08 -- 2009 FV4, 2003 UN12, 2002 HF8, 40329, 39557, 189008, 719
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2009-G08 -- 2009 FS23, 2009 FR30, 2009 FP, 2009 FJ, 2009 FE, 2009 DO1, 2009 DL46, 2000 OB22
198Wildberg Obs. in Germany, 4 in MPEC 2009-G08 -- 2009 FU30, 2009 BA71, 2008 SV11, 2004 VC
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 April '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2009 FJJPL Sentry13362058-210794.4e-05-4.39-4.410JPL: "Analysis based on 116 observations spanning 15.953 days (2009-Mar-17.30916 to 2009-Apr-02.26256)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS13362058-208864.18e-05-4.40-4.410NEODyS: "Based on 123 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/04/02.263."

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 3 April '09

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

1336Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that NEODyS has updated its 2009 FJ risk assessment - see above
Grabbed MPEC 2009-G08 - Daily Orbit Update - see above
Noted that the NEOCP has become active
0410Grabbed MPEC 2009-G07 - Comet C/2008 Q3 (Garradd) - see above