Contents  on 26 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 26 March '11

The MPC's NEO Confirmation Page has 9 listings: 2 new, 7 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and seven updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of nineteen 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 26 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-F30 - "19:41 UT" - 2011 FT2


MPEC 2011-F29 - "19:27 UT" - 2011 FS2


MPEC 2011-F28 - "19:21 UT" - 2011 FR2


MPEC 2011-F27 - "19:17 UT" - 2011 FQ2


MPEC 2011-F26 - "13:35 UT" - 2011 FK1


MPEC 2011-F25 - "10:21 UT" - 2011 FG


<< DOU on 26 Mar. '11 >>  MPEC 2011-F24 - "07:07 UT" - Daily Orbit Update

Observers  on 26 March '11

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-F24 -- 85953
300Bisei Spaceguard Center in Japan, 4 in MPECs 2011-F26, 2011-F28, 2011-F29 & 2011-F30 -- 2011 FT2, 2011 FS2, 2011 FR2, 2011 FK1
160Castelmartini Obs. in Italy, 3 in MPEC 2011-F24 -- 23187, 22771, 11885
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2011-F24, 2011-F25, 2011-F26 & 2011-F30 -- 2011 FT2, 2011 FK1, 2011 FG, 2011 EW29, 2011 EM51, 2008 SO, 2008 FT6, 2007 DU103, 1999 TK12, 99935, 86819, 136874, 136617, 11885, 7480, 4954
807{Dan Reichart via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-F24 -- 2008 EJ1
J18Churchstoke Obs. in Wales, 1 in MPEC 2011-F25 -- 2011 FG
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2011-F24 -- 2011 EW29, 2011 BE38
J95Great Shefford Obs. in England, 7 in MPECs 2011-F24, 2011-F25, 2011-F26, 2011-F27, 2011-F29 & 2011-F30 -- 2011 FT2, 2011 FS2, 2011 FQ2, 2011 FK1, 2011 FG, 2011 EW74, 2011 ES74
A17Guidestar Obs. in Germany, 2 in MPECs 2011-F25 & 2011-F30 -- 2011 FT2, 2011 FG
704LINEAR in New Mexico, 6 in MPECs 2011-F24 & 2011-F27 -- 2011 FQ2, 2009 DV42, 267136, 228368, 184990, 162463
568`program code "`" (30) on Mauna Kea in Hawaii, 11 in MPEC 2011-F24 -- 2009 SG2, 2007 YV56, 1998 QE2, 35396, 212546, 194006, 175706, 162998, 13651, 5693, 4486
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2011-F24, 2011-F27, 2011-F28 & 2011-F29 -- 2011 FS2, 2011 FR2, 2011 FQ2, 234341
A13Naef Obs. in Switzerland, 1 in MPEC 2011-F25 -- 2011 FG
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-F24 -- 2008 FU6
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-F26 -- 2011 FK1
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2011-F25, 2011-F26, 2011-F27 & 2011-F30 -- 2011 FT2, 2011 FQ2, 2011 FK1, 2011 FG
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-F25 -- 2011 FG
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2011-F24 -- 2008 FU6, 1998 SR49, 250706, 250620, 7753, 6037
291Spacewatch 1.8m telescope in Arizona, 25 in MPECs 2011-F24 & 2011-F28 -- 2011 FR2, 2011 EX4, 2011 EX29, 2011 EV29, 2011 EU29, 2011 ET74, 2011 EO51, 2011 EN51, 2011 EN40, 2011 EM51, 2011 EG17, 2011 EF17, 2011 EF15, 2011 ED12, 2011 EC7, 2011 EC41, 2011 DV, 2011 DU, 2011 BN59, 2010 XZ67, 2010 LN14, 2010 DA, 2005 GW119, 2005 AB, 2002 SZ
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-F25, 2011-F26 & 2011-F30 -- 2011 FT2, 2011 FK1, 2011 FG
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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 EU29NEODyS15522087-211031.1e-05-2.56-2.561NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-26.208."
2011 EF17NEODyS1552R E M O V E D-
JPL Sentry1552R E M O V E DJPL: Risk listing removed at 1051 UTC.
2011 DVJPL Sentry1552210819.7e-09-6.33-6.330JPL: "Analysis based on 87 observations spanning 30.978 days (2011-Feb-22.51614 to 2011-Mar-25.49422)." Diameter approximately 0.270 km. from mean, weighted H=20.5.

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 26 March '11

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

2016Grabbed MPEC 2011-F27 - 2011 FQ2 - see above
Grabbed MPEC 2011-F28 - 2011 FR2 - see above
Grabbed MPEC 2011-F29 - 2011 FS2 - see above
Grabbed MPEC 2011-F30 - 2011 FT2 - see above
1552Noted that JPL Sentry has updated its 2011 DV risk assessment - see above
Noted that JPL Sentry has removed 2011 EF17 as an impact risk - see above
Noted that NEODyS has removed 2011 EF17 as an impact risk - see above
Noted that NEODyS has updated its 2011 EU29 risk assessment - see above
Grabbed MPEC 2011-F24 - Daily Orbit Update - see above
Grabbed MPEC 2011-F25 - 2011 FG - see above
Grabbed MPEC 2011-F26 - 2011 FK1 - see above