Contents  on 4 May '10


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 4 May '10

The MPC's NEO Confirmation Page has 10 listings: 7 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven new and three updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of twelve 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 4 May '10

Minor Planet Electronic Circulars

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

MPEC 2010-J15 - "21:20 UT" - 2008 JP

MPEC 2010-J14 - "12:00 UT" - 2010 JA

MPEC 2010-J13 - "11:42 UT" - 2010 HD33

<< DOU on 4 May '10 >>  MPEC 2010-J12 - "06:07 UT" - Daily Orbit Update

MPEC 2010-J11 - "02:41 UT" - 2010 HE79

Observers  on 4 May '10

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2010-J12, 2010-J13 & 2010-J14 -- 2010 JA, 2010 HG20, 2010 HD33, 2010 HC, 2010 GU21, 2010 GT7, 2010 GH30, 2010 FO92, 2010 FA81, 2010 EV45, 2010 CL18, 66400, 153814
160Castelmartini Obs. in Italy, 13 in MPEC 2010-J12 -- 2010 GU6, 2010 GU21, 2010 FA81, 2009 XC2, 2009 SO103, 2009 KD5, 2006 CX10, 2004 TB18, 2000 HD74, 85839, 68359, 218863, 141432
703Catalina Sky Survey in Arizona, 1 in MPEC 2010-J14 -- 2010 JA
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPECs 2010-J12 & 2010-J13 -- 2010 HD33, 2010 GU21
J95Great Shefford Obs. in England, 1 in MPEC 2010-J12 -- 2002 JR100
304Las Campanas Obs. in Chile, 1 in MPEC 2010-J11 -- 2010 HE79
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-J12 -- 2010 FB81
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-J14 -- 2010 JA
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-J13 -- 2010 HD33
D21Shenton Park Obs. in Western Australia, 1 in MPEC 2010-J15 -- 2008 JP
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2010-J12 & 2010-J13 -- 2010 HD33, 237442, 164207
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2010-J12 & 2010-J13 -- 2010 HD33, 2010 HA, 2010 GF30, 2010 FR, 1998 WB2, 153814
926Tenagra II Obs. in Arizona, 2 in MPECs 2010-J12 & 2010-J15 -- 2010 FA81, 2008 JP
C51WISE in Earth polar orbit, 1 in MPEC 2010-J13 -- 2010 HD33
G56Walnut Creek Obs. in northern California, 1 in MPEC 2010-J12 -- 2010 EC135
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 May '10

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. Both also post impact solutions beyond 100 years for a few special 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
153814 2001 WN5NEODyS13272099-212245.84e-10-6.30-6.560NEODyS: "Based on 168 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/05/03.318."

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 4 May '10

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

2201Grabbed MPEC 2010-J15 - 2008 JP - see above
1327Noted that NEODyS has updated its 153814 2001 WN5 risk assessment - see above
Grabbed MPEC 2010-J12 - Daily Orbit Update - see above
Grabbed MPEC 2010-J13 - 2010 HD33 - see above
Grabbed MPEC 2010-J14 - 2010 JA - see above
0628Grabbed MPEC 2010-J11 - 2010 HE79 - see above