Contents  on 28 March '11

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 28 March '11

The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and four updated listings. All of these were "one nighters." The Tracking News counted a total of fifteen listings on the NEOCP on this day.

New MPECs  on 28 March '11

Minor Planet Electronic Circulars

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


MPEC 2011-F43 - "17:56 UT" - 2011 FV9


MPEC 2011-F42 - "17:50 UT" - 2011 FU9


MPEC 2011-F41 - "17:44 UT" - 2011 FT9


MPEC 2011-F40 - "17:36 UT" - 2011 FS9


MPEC 2011-F39 - "16:51 UT" - 2010 VG1


MPEC 2011-F38 - "09:18 UT" - 2011 FV6


<< DOU on 28 Mar. '11 >>  MPEC 2011-F37 - "07:08 UT" - Daily Orbit Update


MPEC 2011-F36 - "06:32 UT" - 2011 FS6


MPEC 2011-F35 - "06:13 UT" - 2011 FR6


MPEC 2011-F34 - "05:48 UT" - 2011 FQ6

Observers  on 28 March '11

A total of 21 observers appeared in this day's MPECs.

CodeObserver / observatory
300Bisei Spaceguard Center in Japan, 2 in MPECs 2011-F34 & 2011-F37 -- 2011 FY2, 2011 FQ6
160Castelmartini Obs. in Italy, 3 in MPEC 2011-F37 -- 68350, 23183, 11885
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2011-F37 & 2011-F41 -- 2011 FT9, 2011 DS9, 2004 FU4, 40267, 163696, 15745, 141525, 102873
807{program code "{" (31) via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2011-F37 -- 2011 FT2, 2011 EW74, 2011 EW29, 2011 EU29, 2011 ED41, 2011 DV, 2011 DS9, 2011 BA12, 2011 AO52, 2010 TV149
807Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2011-F34, 2011-F38, 2011-F39, 2011-F41, 2011-F42 & 2011-F43 -- 2011 FV9, 2011 FV6, 2011 FU9, 2011 FT9, 2011 FQ6, 2010 VG1
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-F37 -- 2008 FU6
448Desert Moon Obs. in New Mexico, 5 in MPEC 2011-F37 -- 2011 ET29, 2011 EM51, 2011 DS9, 2004 FG1, 89958
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 8 in MPEC 2011-F37 -- 2011 FY2, 2011 EW29, 2011 DS9, 2011 CH71, 2011 BO59, 2011 BE38, 2011 AO52, 2011 AN16
113Drebach Obs. in Germany, 3 in MPEC 2011-F37 -- 2011 AO52, 2009 FT, 2002 TD60
A27Eridanus Obs. in Germany, 1 in MPEC 2011-F37 -- 2011 BO59
A17Guidestar Obs. in Germany, 1 in MPEC 2011-F37 -- 2002 SZ
704LINEAR in New Mexico, 7 in MPEC 2011-F37 -- 2011 FY2, 2011 AN16, 2008 FU6, 34613, 267729, 251346, 4660
118Modra Obs. in Slovakia, 1 in MPEC 2011-F37 -- 3554
152Moletai Obs. in Lithuania, 1 in MPEC 2011-F37 -- 2011 EU20
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2011-F34, 2011-F35, 2011-F36, 2011-F37, 2011-F38, 2011-F40, 2011-F42 & 2011-F43 -- 2011 FV9, 2011 FV6, 2011 FU9, 2011 FS9, 2011 FS6, 2011 FR6, 2011 FQ6, 2011 EW29, 2011 EM51, 2011 CG22, 2010 LM14, 2005 JF21, 85953
A24New Millennium Obs. in Italy, 11 in MPEC 2011-F37 -- 2011 CH71, 2009 BH81, 85990, 256412, 23183, 22771, 215167, 21374, 4954, 3122, 1864
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-F37 -- 2011 EC
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-F37 -- 2005 GW119
434San Benedetto Po Obs. in Italy, 2 in MPEC 2011-F37 -- 22771, 11885
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-F37 -- 1916
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-F37 -- 141432
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2011-F35, 2011-F36, 2011-F37 & 2011-F38 -- 2011 FV6, 2011 FS6, 2011 FR6, 2011 EB7, 2011 DV, 2011 BX18, 2011 BR15, 2010 LN14, 2010 LM14, 2007 CT26, 2005 UY5, 2005 RN33, 2005 ML13, 2005 MD, 2004 JO2, 2003 BX33, 1998 HK49, 1991 TF3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 FQ6JPL Sentry15202055-2104413.8e-05-5.86-6.020JPL: "Analysis based on 19 observations spanning .85320 days (2011-Mar-27.26132 to 2011-Mar-28.11452)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS15202052-2090463.78e-05-5.85-6.010NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-03-27.262 to 2011-03-28.115."
2011 EU29NEODyS15202087-211031.2e-05-2.52-2.521NEODyS: "Based on 79 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-27.158."
2011 DVJPL Sentry1520210816.1e-10-7.53-7.530JPL: "Analysis based on 95 observations spanning 32.959 days (2011-Feb-22.51614 to 2011-Mar-27.47534)." 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 28 March '11

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

1832Grabbed MPEC 2011-F42 - 2011 FU9 - see above
Grabbed MPEC 2011-F43 - 2011 FV9 - see above
1748Grabbed MPEC 2011-F40 - 2011 FS9 - see above
Grabbed MPEC 2011-F41 - 2011 FT9 - see above
1705Grabbed MPEC 2011-F39 - 2010 VG1 - see above
1520Noted that JPL Sentry has updated its 2011 DV risk assessment - see above
Noted that NEODyS has updated its 2011 EU29 risk assessment - see above
Noted that JPL Sentry has posted 2011 FQ6 as an impact risk - see above
Noted that NEODyS has posted 2011 FQ6 as an impact risk - see above
Grabbed MPEC 2011-F35 - 2011 FR6 - see above
Grabbed MPEC 2011-F36 - 2011 FS6 - see above
Grabbed MPEC 2011-F37 - Daily Orbit Update - see above
Grabbed MPEC 2011-F38 - 2011 FV6 - see above
0603Grabbed MPEC 2011-F34 - 2011 FQ6 - see above