Contents  on 30 April '10

Resources:

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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 30 April '10

The MPC's NEO Confirmation Page has 12 listings: 10 new, 2 updated

When last checked at 2348 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten new and two updated listings. Of these, three were "one nighters."

New MPECs  on 30 April '10

Minor Planet Electronic Circulars

There were nine MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-H81 - "22:35 UT" - Comet P/2010 H2 (Vales)


MPEC 2010-H80 - "21:47 UT" - 2010 EO65, 2010 EP65, 2010 EU65, 2010 GX34


MPEC 2010-H79 - "17:09 UT" - PHAs


MPEC 2010-H78 - "17:09 UT" - Unusual Minor Planets


MPEC 2010-H77 - "17:09 UT" - Amors


MPEC 2010-H76 - "17:09 UT" - Atens and Apollos


MPEC 2010-H75 - "17:05 UT" - Distant Minor Planets


MPEC 2010-H74 - "17:02 UT" - Observable Comets


<< DOU on 30 Apr. '10 >>  MPEC 2010-H73 - "06:08 UT" - Daily Orbit Update

Observers  on 30 April '10

A total of 38 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPEC 2010-H73 -- 2010 HV20, 2010 HS20, 2010 HC, 2010 GZ6, 2010 GU6, 2010 GU21, 2010 GS7, 2010 GH30, 2010 EK44, 2010 DB34, 2010 CL18, 2010 CH18, 2009 WA, 2009 UY19, 2009 KD5, 2007 JZ20, 2004 XD50, 68216
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2010-H81 -- P/2010 H2
C12Berta Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
B75Betelgeuse Station in Italy, 1 in MPEC 2010-H81 -- P/2010 H2
160Castelmartini Obs. in Italy, 5 in MPEC 2010-H73 -- 2006 CX10, 85839, 232382, 218863, 141432
807Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2010-H80 -- 2010 GX34, 2010 EU65, 2010 EP65, 2010 EO65
G58Chabot Obs. in northern California, 1 in MPEC 2010-H73 -- 2010 GA34
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
458Guadarrama Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
379Hamamatsu-Yuto Obs. in Japan, 2 in MPECs 2010-H73 & 2010-H81 -- P/2010 H2, 2010 GU21
A21Irmtraut Obs. in Germany, 1 in MPEC 2010-H81 -- P/2010 H2
585Kiev Comet Station in the Ukraine, 1 in MPEC 2010-H81 -- P/2010 H2
046Klet Obs. in the Czech Republic, 1 in MPEC 2010-H81 -- P/2010 H2
D95Kurihara Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
J38La Vara Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
B33Libbiano Obs. in Italy, 1 in MPEC 2010-H81 -- P/2010 H2
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2010-H73 -- 2010 GU21
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2010-H73 -- 2010 GR7, 2010 CL18
213Montcabre Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
945Monte Deva Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
900Moriyama Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
583Odessa-Mayaki Obs. in the Ukraine, 1 in MPEC 2010-H81 -- P/2010 H2
D92Osaki Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-H81 -- P/2010 H2
473Remanzacco Obs. in Italy, 2 in MPECs 2010-H73 & 2010-H81 -- P/2010 H2, 2010 GU21
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-H81 -- P/2010 H2
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-H81 -- P/2010 H2
D93Sendai Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
510Siegen Obs. in Germany, 2 in MPECs 2010-H73 & 2010-H81 -- P/2010 H2, 2010 GU21
A71Stixendorf Obs. in Austria, 1 in MPEC 2010-H81 -- P/2010 H2
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-H81 -- P/2010 H2
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-H81 -- P/2010 H2
A48Verona Obs. in Italy, 2 in MPEC 2010-H73 -- 2010 GU21, 2006 CX10
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-H81 -- P/2010 H2
367Yatsuka Obs. in Japan, 1 in MPEC 2010-H81 -- P/2010 H2
J08Zonalunar Obs. in Spain, 1 in MPEC 2010-H81 -- P/2010 H2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2348 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.
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
2010 HS20JPL Sentry13522030-210144.4e-06-4.30-4.340JPL: "Analysis based on 36 observations spanning 8.8667 days (2010-Apr-20.41913 to 2010-Apr-29.285846)." Diameter approximately 0.076 km. from mean, weighted H=23.3.
NEODyS1352203013.23e-06-4.36-4.360NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2010/04/20.420 to 2010/04/29.287."

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 30 April '10

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

2310Grabbed MPEC 2010-H81 - Comet P/2010 H2 (Vales) - see above
2200Grabbed MPEC 2010-H80 - 2010 EO65, 2010 EP65, 2010 EU65, 2010 GX34 - see above
1941Grabbed MPEC 2010-H74 - Observable Comets - see above
Grabbed MPEC 2010-H75 - Distant Minor Planets - see above
Grabbed MPEC 2010-H76 - Atens and Apollos - see above
Grabbed MPEC 2010-H77 - Amors - see above
Grabbed MPEC 2010-H78 - Unusual Minor Planets - see above
Grabbed MPEC 2010-H79 - PHAs - see above
1352Noted that JPL Sentry has updated its 2010 HS20 risk assessment - see above
Noted that NEODyS has updated its 2010 HS20 risk assessment - see above
Grabbed MPEC 2010-H73 - Daily Orbit Update - see above