Contents  on 27 June '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 27 June '11

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of 21 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 27 June '11

Minor Planet Electronic Circulars

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


MPEC 2011-M44 - "17:15 UT" - 2011 MD2


MPEC 2011-M43 - "15:17 UT" - 2011 MC2


MPEC 2011-M42 - "12:49 UT" - 2011 MB2


<< DOU on 27 June '11 >>  MPEC 2011-M41 - "07:06 UT" - Daily Orbit Update


MPEC 2011-M40 - "02:43 UT" - 2011 MW1


MPEC 2011-M39 - "02:41 UT" - 2011 MV1

Observers  on 27 June '11

A total of 44 observers appear in today's MPECs.

CodeObserver / observatory
7057program code 7 via Apache Point Obs. in New Mexico, 8 in MPEC 2011-M41 -- 2007 WU3, 2007 VY7, 2007 TB23, 2006 UN216, 2006 UM, 2006 SE6, 2006 OT9, 2006 KZ112
A81Balzaretto Obs. in Italy, 1 in MPEC 2011-M41 -- 2011 MD
300Bisei Spaceguard Center in Japan, 15 in MPEC 2011-M41 -- 2011 GW9, 2011 GQ59, 2011 GP59, 2011 GL62, 2011 GG60, 2011 GF, 2011 FS29, 2011 EM51, 2004 FU4, 89958, 274138, 267729, 163250, 4954, 1866
235CAST Obs. in Italy, 1 in MPEC 2011-M41 -- 2011 MD
I77CEAMIG-REA in Brazil, 1 in MPEC 2011-M41 -- 2011 MD
B20Carmelita Obs. in Spain, 1 in MPEC 2011-M41 -- 2011 MD
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2011-M39, 2011-M40, 2011-M41 & 2011-M42 -- 2011 MW1, 2011 MV1, 2011 MT, 2011 ML, 2011 MK, 2011 MC, 2011 MB2, 2011 LX10, 2011 LH, 2011 HT, 2011 CG2, 2010 YH
970Chelmsford Obs. in England, 1 in MPEC 2011-M41 -- 2011 MD
B92Chinon Obs. in France, 1 in MPEC 2011-M41 -- 1036
C13Como Obs. in Italy, 2 in MPEC 2011-M41 -- 2008 VH, 2008 LV16
448Desert Moon Obs. in New Mexico, 2 in MPEC 2011-M41 -- 2011 MD, 2008 RP108
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2011-M39 & 2011-M41 -- 2011 MV1, 2011 MD
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-M40 -- 2011 MW1
157Frasso Sabino Obs. in Italy, 3 in MPEC 2011-M41 -- 2011 MD, 2008 VH, 2008 LV16
203GiaGa Obs. in Italy, 2 in MPEC 2011-M41 -- 2011 LA19, 2011 KP17
J95Great Shefford Obs. in England, 1 in MPEC 2011-M41 -- 2011 MD
A17Guidestar Obs. in Germany, 2 in MPEC 2011-M41 -- 2011 ME, 2011 MD
B86Hagen Obs. in Germany, 1 in MPEC 2011-M41 -- 2011 MD
G89Kachina Obs. in Arizona, 1 in MPEC 2011-M41 -- 2011 MD
704LINEAR in New Mexico, 3 in MPEC 2011-M41 -- 2011 MK, 2008 LV16, 3288
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2011-M41 -- 2011 MD, 2011 JA8
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2011-M39, 2011-M40, 2011-M41, 2011-M43 & 2011-M44 -- 2011 MW1, 2011 MV1, 2011 MD2, 2011 MD, 2011 MC2, 2011 AG5
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-M41 -- 2011 MD
213Montcabre Obs. in Spain, 1 in MPEC 2011-M41 -- 2011 MD
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-M39, 2011-M40, 2011-M41, 2011-M43 & 2011-M44 -- 2011 MW1, 2011 MV1, 2011 MD2, 2011 MD, 2011 MC2, 2002 TD60
J93Mt. Tuffley Obs. in England, 4 in MPEC 2011-M41 -- 3988, 3288, 3103, 1036
A13Naef Obs. in Switzerland, 1 in MPEC 2011-M41 -- 2011 MD
C27Pallerols Obs. in Spain, 1 in MPEC 2011-M41 -- 2011 EZ78
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-M41 -- 21374
B49Paus Obs. in Spain, 1 in MPEC 2011-M41 -- 2011 MD
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2011-M41 -- 2011 MD
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-M41 -- 2011 MD
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-M42 -- 2011 MB2
939Rodeno Obs. in Spain, 1 in MPEC 2011-M41 -- 2011 MD
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-M41 -- 2011 MD
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-M39 & 2011-M41 -- 2011 MV1, 2011 MD
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-M44 -- 2011 MD2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-M42 -- 2011 MB2
J84South Obs. in England, 1 in MPEC 2011-M41 -- 2011 MD
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-M41 -- 2010 YH
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2011-M39, 2011-M40, 2011-M41 & 2011-M44 -- 2011 MW1, 2011 MV1, 2011 MF, 2011 MD2, 2011 LS17, 2011 LK19, 2011 LJ19
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2011-M42 -- 2011 MB2
A48Verona Obs. in Italy, 4 in MPEC 2011-M41 -- 2011 KP17, 2011 KN9, 2011 EZ78, 2011 DL19
198Wildberg Obs. in Germany, 1 in MPEC 2011-M41 -- 2011 MD
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 June '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 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 MDJPL Sentry23592067-2111485.5e-04-5.26-5.980JPL #2 for the day: "Analysis based on 386 observations spanning 4.8841 days (2011-Jun-22.26489 to 2011-Jun-27.14903)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
NEODyS15262081-208943.97e-05-6.33-6.460NEODyS: "Based on 386 optical observations (of which 18 are rejected as outliers) from 2011-06-22.266 to 2011-06-27.150."
2011 LS17JPL Sentry1529R E M O V E DJPL: Risk listing removed at 0950 UTC.
NEODyS1526R E M O V E D-
2011 AG5NEODyS15262040-204788.47e-04-1.38-1.381NEODyS: "Based on 153 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-06-26.395."
JPL Sentry00182040-204756.9e-04-1.47-1.471JPL: "Analysis based on 149 observations spanning 168.15 days (2011-Jan-08.2673 to 2011-Jun-25.41689)." Diameter approximately 0.150 km. from mean, weighted H=21.8.

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 27 June '11

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

2359Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
1910Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
1720Grabbed MPEC 2011-M44 - 2011 MD2 - see above
1529Noted that JPL Sentry has removed 2011 LS17 as an impact risk - see above
1526Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Noted that NEODyS has removed 2011 LS17 as an impact risk - see above
Noted that NEODyS has updated its 2011 MD risk assessment - see above
Grabbed MPEC 2011-M41 - Daily Orbit Update - see above
Grabbed MPEC 2011-M42 - 2011 MB2 - see above
Grabbed MPEC 2011-M43 - 2011 MC2 - see above
0325Grabbed MPEC 2011-M39 - 2011 MV1 - see above
Grabbed MPEC 2011-M40 - 2011 MW1 - see above
0018Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above