Contents  on 30 March '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 30 March '11

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of fourteen 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 30 March '11

Minor Planet Electronic Circulars

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


MPEC 2011-F53 - "22:31 UT" - 2010 FE49


MPEC 2011-F52 - "22:27 UT" - 2010 FD49


MPEC 2011-F51 - "19:02 UT" - 2011 FR21


MPEC 2011-F50 - "18:53 UT" - 2011 FQ21


<< DOU on 30 Mar. '11 >>  MPEC 2011-F49 - "07:08 UT" - Daily Orbit Update


MPEC 2011-F48 - "06:50 UT" - 2011 FR17


MPEC 2011-F47 - "06:12 UT" - 2011 FQ17

Observers  on 30 March '11

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2011-F49 -- 2008 FT6, 2004 FX31, 5646, 4401
807{program code "{" (31) via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2011-F49 -- 2011 FY2, 2011 FV6, 2011 FU9, 2011 FT9, 2011 ED41, 2011 DV, 2006 SV134, 2005 LY19, 2004 HC, 1997 XV11
807Robert Holmes via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-F47 -- 2011 FQ17
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2011-F49 -- 263976
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-F49 -- 2008 FU6
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2011-F49 -- 2011 BE38
113Drebach Obs. in Germany, 1 in MPEC 2011-F49 -- 2011 AO52
A17Guidestar Obs. in Germany, 3 in MPEC 2011-F49 -- 2011 FT2, 2011 EM51, 2011 DV
355Hadano Obs. in Japan, 5 in MPEC 2011-F49 -- 2011 EW29, 2011 AO52, 2004 FU4, 2002 TD60, 267729
168Kourovskaya Obs. in Russia, 5 in MPEC 2011-F49 -- 1999 TK12, 85953, 23187, 11885, 3122
704LINEAR in New Mexico, 8 in MPECs 2011-F47 & 2011-F49 -- 2011 FT2, 2011 FQ17, 2011 EW29, 2008 SO, 2008 FT6, 85953, 18882, 4401
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-F47 -- 2011 FQ17
6885Larry Wasserman via Lowell Obs. Anderson Mesa Station in Arizona, 2 in MPECs 2011-F52 & 2011-F53 -- 2010 FE49, 2010 FD49
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2011-F49 -- 2010 VX39, 2008 FU6, 2008 FT6
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2011-F48, 2011-F49, 2011-F50 & 2011-F51 -- 2011 FR6, 2011 FR21, 2011 FR17, 2011 FQ21, 2011 EU29, 2005 GW119, 2000 CR101, 175189, 12923, 9856, 5646
A24New Millennium Obs. in Italy, 20 in MPEC 2011-F49 -- 2011 CH71, 2009 EN2, 2008 FT6, 2001 QP181, 99935, 89830, 53435, 40267, 36284, 267940, 265196, 256412, 248083, 23187, 228368, 21374, 144332, 7480, 4401, 1864
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-F49 -- 2004 EK1
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2011-F49 -- 85953, 22771, 11885, 3554
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2011-F49 -- 2008 FU6, 4401
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-F49 -- 2011 FY2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-F49 -- 162781
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2011-F49, 2011-F52 & 2011-F53 -- 2010 FE49, 2010 FD49, 250706, 6037
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2011-F48, 2011-F49, 2011-F50 & 2011-F51 -- 2011 FR21, 2011 FR17, 2011 FQ6, 2011 FQ21, 2011 EF15
I93St. Pardon de Conques Obs. in France, 2 in MPEC 2011-F49 -- 2011 EO51, 2010 WE9
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-F49 -- 89958
A48Verona Obs. in Italy, 3 in MPEC 2011-F49 -- 2011 AN16, 2004 FG1, 2002 TD60
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 March '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 FQ6NEODyS16032051-2090403.17e-05-5.95-6.040NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2011-03-27.262 to 2011-03-29.399."
JPL Sentry16002053-2103302.9e-05-5.99-6.100JPL: "Analysis based on 22 observations spanning 2.1366 days (2011-Mar-27.26132 to 2011-Mar-29.39793)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2011 EU29NEODyS16032110-211017.0e-06-2.76-2.760NEODyS: "Based on 88 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-29.205."
JPL Sentry1600211016.7e-06-2.78-2.780JPL: "Analysis based on 88 observations spanning 21.003 days (2011-Mar-08.20041 to 2011-Mar-29.20384)." Diameter approximately 0.370 km. from mean, weighted H=19.8.

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 March '11

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

2248Grabbed MPEC 2011-F52 - 2010 FD49 - see above
Grabbed MPEC 2011-F53 - 2010 FE49 - see above
1939Grabbed MPEC 2011-F50 - 2011 FQ21 - see above
Grabbed MPEC 2011-F51 - 2011 FR21 - see above
1603Noted that NEODyS has updated its 2011 EU29 risk assessment - see above
Noted that NEODyS has updated its 2011 FQ6 risk assessment - see above
1600Noted that JPL Sentry has updated its 2011 EU29 risk assessment - see above
Noted that JPL Sentry has updated its 2011 FQ6 risk assessment - see above
Grabbed MPEC 2011-F48 - 2011 FR17 - see above
Grabbed MPEC 2011-F49 - Daily Orbit Update - see above
0637Grabbed MPEC 2011-F47 - 2011 FQ17 - see above