Contents  on 4 April '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 April '10

The MPC's NEO Confirmation Page has 6 listings: 4 new, 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of fourteen 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 April '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-G19 - "21:52 UT" - 2010 GU5

MPEC 2010-G18 - "20:08 UT" - 2010 FJ81

MPEC 2010-G17 - "20:05 UT" - 2010 FH81

MPEC 2010-G16 - "20:02 UT" - 2010 FG81

<< DOU on 4 Apr. '10 >>  MPEC 2010-G15 - "06:08 UT" - Daily Orbit Update

Observers  on 4 April '10

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-G19 -- 2010 GU5
A81Balzaretto Obs. in Italy, 4 in MPEC 2010-G15 -- 2010 CC180, 88254, 218863, 163243
703Catalina Sky Survey in Arizona, 1 in MPEC 2010-G19 -- 2010 GU5
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2010-G15 -- 2010 EE43, 162882
B23Fiamene Obs. in Italy, 6 in MPEC 2010-G15 -- 2010 FR, 2010 EK44, 2010 CN44, 1996 GQ, 88254, 218863
J95Great Shefford Obs. in England, 1 in MPEC 2010-G19 -- 2010 GU5
J75La Sagra Obs. in Spain, 1 in MPEC 2010-G15 -- 68216
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2010-G16, 2010-G17 & 2010-G18 -- 2010 FJ81, 2010 FH81, 2010 FG81
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-G19 -- 2010 GU5
H36Sandlot Obs. in Kansas, 2 in MPEC 2010-G15 -- 2010 FC6, 2005 YU55
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-G15 -- 2005 YU55
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-G15 -- 2005 YU55
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2010-G15 -- 2010 FV9, 2010 FT9, 2010 FQ9, 2010 FB6, 2010 EQ43, 2010 EK43, 2010 EJ43, 2010 EF44, 2010 EA46, 2010 CW180, 2010 CH55, 2005 YU55, 1996 FS1
926Tenagra II Obs. in Arizona, 5 in MPECs 2010-G15 & 2010-G19 -- 2010 GU5, 2010 FL48, 2010 FC6, 2010 FA81, 2010 EE43
H53Thompsonville Obs. in Illinois, 4 in MPEC 2010-G15 -- 88254, 218863, 3554, 1627
G72University Hills Obs. in southern California, 1 in MPEC 2010-G15 -- 2010 CM44
C51WISE in Earth polar orbit, 3 in MPECs 2010-G16, 2010-G17 & 2010-G18 -- 2010 FJ81, 2010 FH81, 2010 FG81
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2303 and NEODyS at 2359 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
2010 FC81NEODyS15122026-204128.12e-10-7.24-7.360NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/03/30.763 to 2010/04/03.216."

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 April '10

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

2303Grabbed MPEC 2010-G17 - 2010 FH81 - see above
Grabbed MPEC 2010-G18 - 2010 FJ81 - see above
Grabbed MPEC 2010-G19 - 2010 GU5 - see above
2302Grabbed MPEC 2010-G16 - 2010 FG81 - see above
1512Noted that NEODyS has posted 2010 FC81 as an impact risk - see above
Grabbed MPEC 2010-G15 - Daily Orbit Update - see above