Contents  on 12 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 12 June '11

The MPC's NEO Confirmation Page has 99 listings

When last checked at 2325 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 99 objects listed. Of these, 71 were "one nighters." So far The Tracking News has counted a total of 112 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 12 June '11

Minor Planet Electronic Circulars

As of last check at 2325 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-L51 - "20:06 UT" - Observations and Orbits of Comets


<< DOU on 12 June '11 >>  MPEC 2011-L50 - "07:10 UT" - Daily Orbit Update


MPEC 2011-L49 - "03:13 UT" - 2011 LK19


MPEC 2011-L48 - "02:59 UT" - 2011 LJ19


MPEC 2011-L47 - "02:37 UT" - 2011 LD19


MPEC 2011-L46 - "02:26 UT" - 2011 LC19


MPEC 2011-L45 - "01:22 UT" - 2011 LB19

Observers  on 12 June '11

A total of 61 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2011-L51 -- C/2009 F4
349Ageo Obs. in Japan, 4 in MPEC 2011-L51 -- C/2009 P1, 115P, 78P, 27P
J24Altamira Obs. in the Canary Islands, 3 in MPEC 2011-L51 -- C/2011 F1, C/2011 A3, 73P
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2011-L47 & 2011-L51 -- 2011 LD19, C/2011 K1
069Baldone Obs. in Latvia, 1 in MPEC 2011-L51 -- C/2010 G2
300Bisei Spaceguard Center in Japan, 13 in MPEC 2011-L51 -- C/2011 K1, C/2011 F1, C/2011 C1, C/2011 A3, P/2011 A2, C/2010 X1, C/2010 G2, C/2009 UG89, C/2007 VO53, C/2005 L3, 240P, 123P, 29P
B96Brixiis Obs. in Belgium, 2 in MPEC 2011-L51 -- C/2011 A3, C/2009 UG89
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2011-L47, 2011-L50 & 2011-L51 -- 2011 LD19, 2011 KP17, P/2011 JB15, C/2011 A3, C/2010 L3, C/2010 J2, C/2009 Y1, 2008 AS28, C/2007 VO53, 2004 JO2, 162474, 240P, 115P, 71P, 37P
693Catalina Station in Arizona, 1 in MPEC 2011-L51 -- 45P
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2011-L45, 2011-L46, 2011-L47, 2011-L48 & 2011-L50 -- 2011 LZ2, 2011 LJ19, 2011 LD19, 2011 LC19, 2011 LB19
A77Chante-Perdrix Obs. in France, 6 in MPEC 2011-L51 -- C/2011 L4, C/2011 L1, P/2011 JB15, C/2011 F1, C/2009 P1, 21P
J01Cielo Profundo Obs. in Spain, 2 in MPEC 2011-L51 -- C/2009 P1, C/2006 S3
958Dax Obs. in France, 12 in MPEC 2011-L51 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2009 Y1, C/2009 UG89, C/2009 P1, C/2007 VO53, C/2006 S3, 240P, 115P, 73P, 29P
448Desert Moon Obs. in New Mexico, 6 in MPECs 2011-L49 & 2011-L50 -- 2011 LK19, 2011 KP17, 2011 KN17, 2006 OY10, 2002 UX, 5496
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2011-L51 -- C/2011 K1
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 2 in MPECs 2011-L50 & 2011-L51 -- C/2011 L4, 2102
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-L51 -- 29P
372Geisei Obs. in Japan, 1 in MPEC 2011-L51 -- C/2011 L3
J95Great Shefford Obs. in England, 4 in MPECs 2011-L45, 2011-L46, 2011-L49 & 2011-L50 -- 2011 LT17, 2011 LK19, 2011 LC19, 2011 LB19
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-L51 -- P/2010 J5
585Kiev Comet Station in the Ukraine, 11 in MPEC 2011-L51 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2009 Y1, C/2009 P1, C/2006 S3, 123P, 115P, 48P, 29P, 21P
400Kitami Obs. in Japan, 6 in MPEC 2011-L51 -- C/2010 X1, C/2010 R1, C/2009 UG89, C/2007 VO53, C/2006 S3, 115P
D95Kurihara Obs. in Japan, 11 in MPEC 2011-L51 -- C/2011 L3, C/2010 X1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2006 S3, 240P, 213P, 123P, 29P, 27P
704LINEAR in New Mexico, 7 in MPECs 2011-L50 & 2011-L51 -- 2011 LT17, C/2011 A3, 2008 VH, C/2007 VO53, 267759, 248590, 7482
J87La Canada Obs. in Spain, 1 in MPEC 2011-L51 -- C/2011 K1
J38La Vara Obs. in Spain, 3 in MPEC 2011-L51 -- C/2010 X1, 115P, 29P
844Los Molinos Obs. in Uruguay, 2 in MPEC 2011-L51 -- C/2009 P1, 213P
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2011-L45, 2011-L46, 2011-L47, 2011-L49 & 2011-L50 -- 2011 LK19, 2011 LD19, 2011 LC19, 2011 LB19, 2011 AG5
C10Maisoncelles Obs. in France, 7 in MPEC 2011-L51 -- C/2010 X1, C/2009 Y1, C/2009 P1, C/2007 Q3, P/2006 T1, C/2006 S3, 29P
A01Masia Cal Maciarol Modul 1 in Spain, 1 in MPEC 2011-L51 -- 29P
945Monte Deva Obs. in Spain, 3 in MPEC 2011-L51 -- C/2011 F1, C/2010 G2, 123P
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2011-L45, 2011-L46, 2011-L47, 2011-L48, 2011-L49, 2011-L50 & 2011-L51 -- 2011 LK19, 2011 LJ19, 2011 LD19, 2011 LC19, 2011 LB19, C/2011 K1, 2011 FZ2, 21374, 164206, 115P, 48P, 45P
675|program code "|" (32) via Mt. Palomar in southern California, 1 in MPEC 2011-L51 -- 45P
E07Murrumbateman Obs. in New South Wales, 3 in MPEC 2011-L51 -- C/2011 L1, 43P, 21P
583Odessa-Mayaki Obs. in the Ukraine, 2 in MPEC 2011-L51 -- C/2011 A3, C/2006 S3
C23Olmen Obs. in Belgium, 5 in MPEC 2011-L51 -- C/2011 F1, C/2010 G2, C/2009 UG89, C/2009 P1, C/2006 S3
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2011-L50 & 2011-L51 -- 2011 DS9, 87309, 32906, 78P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2011-L51 -- C/2011 F1, C/2011 A3, C/2010 G2, C/2009 UG89, 115P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 15 in MPECs 2011-L50 & 2011-L51 -- C/2011 L4, C/2011 L3, C/2011 L2, C/2011 L1, C/2011 K1, C/2011 J3, C/2011 G1, C/2011 C1, C/2009 P1, 2009 BD, 2008 HE, 213P, 78P, 27P, 9P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 5 in MPEC 2011-L51 -- C/2011 L4, C/2011 K1, C/2009 P1, C/2006 S3, 48P
473Remanzacco Obs. in Italy, 1 in MPEC 2011-L51 -- 29P
939Rodeno Obs. in Spain, 4 in MPEC 2011-L51 -- C/2011 A3, C/2009 UG89, C/2006 S3, 115P
461SZTE Asteroid Program in Hungary, 2 in MPEC 2011-L51 -- C/2011 A3, C/2009 UG89
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-L47 -- 2011 LD19
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-L51 -- C/2010 X1
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-L47 -- 2011 LD19
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-L51 -- C/2011 G1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2011-L51 -- C/2011 L3, C/2011 L2
510Siegen Obs. in Germany, 1 in MPEC 2011-L51 -- C/2010 X1
G68Sierra Stars Obs. in northern California, 2 in MPEC 2011-L51 -- C/2010 X1, C/2006 S3
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2011-L50 & 2011-L51 -- 2011 KP17, 2006 RG7, 2003 WM25, 163335, 162474, 115P
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2011-L45, 2011-L46, 2011-L47, 2011-L48 & 2011-L50 -- 2011 LY2, 2011 LJ19, 2011 LD19, 2011 LC19, 2011 LB19, 2011 KW19, 2011 KN17
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2011-L46 & 2011-L47 -- 2011 LD19, 2011 LC19
A71Stixendorf Obs. in Austria, 6 in MPEC 2011-L51 -- C/2011 J3, C/2010 X1, 240P, 73P, 29P, 27P
I40TRAPPIST in Chile, 11 in MPEC 2011-L51 -- C/2011 C3, C/2011 C1, C/2010 X1, C/2010 FB87, C/2010 B1, C/2006 W3, C/2006 S3, 213P, 103P, 43P, 29P
926Tenagra II Obs. in Arizona, 2 in MPEC 2011-L51 -- C/2011 K1, C/2010 R1
H10Tzec Maun Obs. Mayhill in New Mexico, 11 in MPEC 2011-L51 -- C/2011 L3, C/2010 S1, C/2010 R1, C/2009 Y1, C/2009 P1, C/2006 S3, 213P, 130P, 78P, 48P, 21P
D96Tzec Maun Obs. Moorook in South Australia, 5 in MPEC 2011-L51 -- C/2010 X1, C/2009 P1, C/2009 F4, C/2006 S3, 29P
H47Vicksburg Obs. in Mississippi, 6 in MPECs 2011-L50 & 2011-L51 -- 2011 EZ78, C/2009 Y1, C/2009 P1, C/2006 S3, 115P, 48P
C28Wellinghofen Obs. in Germany, 1 in MPEC 2011-L51 -- 29P
367Yatsuka Obs. in Japan, 10 in MPEC 2011-L51 -- C/2011 G1, C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2006 S3, 213P, 29P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 June '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2325 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 LJ19JPL Sentry05372040-2103121.1e-06-4.29-4.460JPL: "Analysis based on 19 observations spanning 1.9695 days (2011-Jun-09.22872 to 2011-Jun-11.19822)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
2011 LA19JPL Sentry02052040-2108123.2e-07-3.45-3.650JPL: "Analysis based on 37 observations spanning 2.6535 days (2011-Jun-09.29963 to 2011-Jun-11.9531)." Diameter approximately 0.532 km. from mean, weighted H=19.0.
2011 LT17JPL Sentry15332072-211071.8e-06-4.10-4.300JPL: "Analysis based on 47 observations spanning 2.5839 days (2011-Jun-09.33984 to 2011-Jun-11.9237)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2011 LS17NEODyS22402038-208986.97e-09-6.74-6.870NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2011-06-07.400 to 2011-06-09.267."
2011 KN17JPL Sentry1533207113.1e-07-5.24-5.240JPL: "Analysis based on 84 observations spanning 12.078 days (2011-May-30.27802 to 2011-Jun-11.35629)." Diameter approximately 0.100 km. from mean, weighted H=22.6.

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 12 June '11

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

2240Noted that NEODyS has posted 2011 LS17 as an impact risk - see above
2015Grabbed MPEC 2011-L51 - Observations and Orbits of Comets - see above
1533Noted that JPL Sentry has updated its 2011 KN17 risk assessment - see above
Noted that JPL Sentry has updated its 2011 LT17 risk assessment - see above
Grabbed MPEC 2011-L50 - Daily Orbit Update - see above
0537Noted that JPL Sentry has posted 2011 LJ19 as an impact risk - see above
0331Grabbed MPEC 2011-L49 - 2011 LK19 - see above
0302Grabbed MPEC 2011-L46 - 2011 LC19 - see above
Grabbed MPEC 2011-L47 - 2011 LD19 - see above
Grabbed MPEC 2011-L48 - 2011 LJ19 - see above
0205Noted that JPL Sentry has posted 2011 LA19 as an impact risk - see above
Grabbed MPEC 2011-L45 - 2011 LB19 - see above