Contents  on 9 May '11


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 9 May '11

The MPC's NEO Confirmation Page has 9 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 24 listings on the NEOCP 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 9 May '11

Minor Planet Electronic Circulars

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

MPEC 2011-J38 - "17:40 UT" - 2011 JW10

MPEC 2011-J37 - "17:39 UT" - 2011 JV10

MPEC 2011-J36 - "17:38 UT" - 2011 JU10

<< DOU on 9 May '11 >>  MPEC 2011-J35 - "07:08 UT" - Daily Orbit Update

Observers  on 9 May '11

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-J35 -- 2002 SS41
703Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2011-J35 -- 2011 JB10, 2011 HP, 2011 HC24, 2011 AO52, 2010 VN65, 2008 GV20, 2006 SV134, 2004 FU4, 2002 JQ100, 86878, 85490, 260141, 256670, 152941, 138359
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2011-J35 & 2011-J36 -- 2011 JY1, 2011 JU2, 2011 JU10, 2011 JL, 2011 JK, 2011 JD1
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2011-J35 -- 2011 GP59
157Frasso Sabino Obs. in Italy, 6 in MPEC 2011-J35 -- 2011 JA, 2011 HT, 2011 HQ, 2011 HO, 2011 GQ65, 2011 EZ78
J95Great Shefford Obs. in England, 3 in MPECs 2011-J35 & 2011-J38 -- 2011 JW10, 2011 JM5, 2011 JB10
A17Guidestar Obs. in Germany, 2 in MPEC 2011-J35 -- 2011 JX1, 2011 HL7
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-J35 -- 2001 QP181
704LINEAR in New Mexico, 5 in MPEC 2011-J35 -- 2004 JO2, 2004 FU4, 264308, 256670, 3288
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2011-J35, 2011-J36, 2011-J37 & 2011-J38 -- 2011 JW10, 2011 JV10, 2011 JU10, 2011 JM5, 2011 JB10, 2011 HB53
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2011-J35, 2011-J36, 2011-J37 & 2011-J38 -- 2011 JW10, 2011 JV10, 2011 JU10, 2011 HO53, 2011 FY22, 2010 VN65, 2002 JQ100, 85490, 267729, 175706, 138359, 7889
A13Naef Obs. in Switzerland, 1 in MPEC 2011-J35 -- 2007 PP6
A24New Millennium Obs. in Italy, 11 in MPEC 2011-J35 -- 2010 WQ7, 2006 SV134, 89830, 274138, 260141, 23187, 144332, 141525, 136617, 8176, 4954
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-J35 -- 2011 JB10
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-J35 -- 2011 JB10
H36Sandlot Obs. in Kansas, 2 in MPEC 2011-J35 -- 2011 GS60, 2001 VH5
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2011-J35 -- 2007 RV17, 2000 YH4, 24445
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2011-J35 -- 2011 HS60, 2011 HO53, 2011 HO5, 2011 HO24, 2011 HN24, 2011 HF, 2010 CN1, 2007 XC10
198Wildberg Obs. in Germany, 1 in MPEC 2011-J35 -- 2011 JB10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 May '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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
2011 HB53JPL Sentry1458R E M O V E DJPL: Risk listing removed at 1050 UTC.
NEODyS1458R E M O V E D-
2011 HO5JPL Sentry14582069-2108332.3e-05-4.60-4.810JPL: "Analysis based on 48 observations spanning 10.937 days (2011-Apr-27.39956 to 2011-May-08.33705)." Diameter approximately 0.048 km. from mean, weighted H=24.3.
NEODyS14582069-2090302.07e-05-4.65-4.810NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2011-04-27.400 to 2011-05-08.338."
2011 AG5JPL Sentry14582036-2052102.8e-04-1.89-1.891JPL: "Analysis based on 128 observations spanning 119.19 days (2011-Jan-08.2673 to 2011-May-07.459)." Diameter approximately 0.140 km. from mean, weighted H=21.9.

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 9 May '11

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

1801Grabbed MPEC 2011-J36 - 2011 JU10 - see above
Grabbed MPEC 2011-J37 - 2011 JV10 - see above
Grabbed MPEC 2011-J38 - 2011 JW10 - see above
1458Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
Noted that JPL Sentry has removed 2011 HB53 as an impact risk - see above
Noted that NEODyS has removed 2011 HB53 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 HO5 risk assessment - see above
Noted that NEODyS has updated its 2011 HO5 risk assessment - see above
Grabbed MPEC 2011-J35 - Daily Orbit Update - see above