Contents  on 3 May '11

Resources:

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 May '11

The Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) was not checked on this day.

New MPECs  on 3 May '11

Minor Planet Electronic Circulars

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


MPEC 2011-J13 - "22:34 UT" - 2011 JL


MPEC 2011-J12 - "22:33 UT" - 2011 JK


MPEC 2011-J11 - "22:31 UT" - 2011 HJ61


MPEC 2011-J10 - "19:49 UT" - 2011 HS60


MPEC 2011-J09 - "19:47 UT" - 2011 HR60


MPEC 2011-J08 - "18:57 UT" - 2005 PH2


<< DOU on 3 May '11 >>  MPEC 2011-J07 - "07:07 UT" - Daily Orbit Update

Observers  on 3 May '11

Eighteen observers appeared in this day's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2011-J07 -- 2004 FG1, 2002 WP11, 1998 KH9, 85490, 138359, 10145
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2011-J08, 2011-J10, 2011-J11, 2011-J12 & 2011-J13 -- 2011 JL, 2011 JK, 2011 HS60, 2011 HJ61, 2005 PH2
J18Churchstoke Obs. in Wales, 1 in MPEC 2011-J13 -- 2011 JL
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2011-J07 -- 2011 HQ
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-J11 -- 2011 HJ61
J95Great Shefford Obs. in England, 2 in MPECs 2011-J10 & 2011-J12 -- 2011 JK, 2011 HS60
704LINEAR in New Mexico, 5 in MPEC 2011-J07 -- 2004 FU4, 2001 QP181, 24445, 169675, 4954
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2011-J09, 2011-J10, 2011-J11 & 2011-J12 -- 2011 JK, 2011 HS60, 2011 HR60, 2011 HJ61
474Mt. John Obs. in New Zealand, 2 in MPEC 2011-J07 -- 2011 GM44, 2011 DL19
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2011-J07, 2011-J09, 2011-J11 & 2011-J12 -- 2011 JK, 2011 HR60, 2011 HJ61, 2011 EZ78, 2011 AO52, 2008 LN16, 34613, 249595
A24New Millennium Obs. in Italy, 17 in MPEC 2011-J07 -- 2011 EM51, 2011 AO52, 2010 WQ7, 2010 VN65, 2009 FT, 2004 HC, 274138, 267759, 263976, 260141, 250614, 198856, 163250, 162463, 141525, 8176, 4954
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2011-J07 -- 274138
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2011-J07, 2011-J08, 2011-J10 & 2011-J13 -- 2011 JL, 2011 HS60, 2011 GH62, 2010 TS149, 2010 SL13, 2006 VT2, 2005 PH2, 248818, 237442, 192563, 186822, 3671
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-J07 -- 260141
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-J07 -- 2011 GJ62
H36Sandlot Obs. in Kansas, 3 in MPECs 2011-J07 & 2011-J13 -- 2011 JL, 2011 HC36, 2011 HC24
291Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2011-J07 -- 2011 HO5, 2011 HO24, 2011 HN5, 2011 HN24, 2011 HF, 2011 HC36, 2011 GO65, 2011 GN44, 2011 GB55, 2010 LM68, 154993
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-J10 -- 2011 HS60
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 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.
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
2011 HN24NEODyS14442027-202716.4e-08-8.06-8.060NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2011-04-27.460 to 2011-05-02.397."
2011 HO5JPL Sentry14442025-21102628.1e-05-3.72-4.230JPL: "Analysis based on 21 observations spanning 5.0141 days (2011-Apr-27.39956 to 2011-May-02.41362)." Diameter approximately 0.054 km. from mean, weighted H=24.0.
NEODyS14442025-2090951.85e-05-4.34-4.970NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2011-04-27.400 to 2011-05-02.414."
2011 GN44NEODyS14442068-206813.6e-08-3.81-3.810NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2011-04-03.444 to 2011-05-03.212."
JPL Sentry1444R E M O V E DJPL: Risk listing removed at 1050 UTC.

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 May '11

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

2309Grabbed MPEC 2011-J11 - 2011 HJ61 - see above
Grabbed MPEC 2011-J12 - 2011 JK - see above
Grabbed MPEC 2011-J13 - 2011 JL - see above
2001Grabbed MPEC 2011-J09 - 2011 HR60 - see above
Grabbed MPEC 2011-J10 - 2011 HS60 - see above
1907Grabbed MPEC 2011-J08 - 2005 PH2 - see above
1444Noted that JPL Sentry has removed 2011 GN44 as an impact risk - see above
Noted that NEODyS has updated its 2011 GN44 risk assessment - see above
Noted that NEODyS has posted 2011 HN24 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-J07 - Daily Orbit Update - see above