Contents  on 17 June '12

Asteroid/Comet Connection (A/CC) 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.

Traffic Report  on 17 June '12

Two objects reported inside ten LD

There are two asteroids reported moving within ten lunar distances (LD) of Earth today. 2012 LA11 is outbound from 7.30 to 8.07 LD and 2012 LU is inbound from 9.89 to 8.90 LD. No other objects are known to be approaching the ten-LD "bubble" until November.

This report was generated at 1647 UTC with follow-up in today's DOU MPEC for 2012 LA11 and 2012 LU plus departed 2012 KZ41.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

Radar Astrometry  on 17 June '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0512 UTC when the database was dated 16 June

NEOCP Activity  on 17 June '12

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2302 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 57 listings on the NEOCP today.

New MPECs  on 17 June '12

Minor Planet Electronic Circulars

As of last check at 2302 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-M11 - "17:24 UT" - 2012 LK11


MPEC 2012-M10 - "17:21 UT" - 2012 LJ11


MPEC 2012-M09 - "17:19 UT" - 2012 LH11


MPEC 2012-M08 - "17:17 UT" - 2012 LG11


MPEC 2012-M07 - "17:14 UT" - 2012 LF11


MPEC 2012-M06 - "17:12 UT" - 2012 LE11


<< DOU on 17 June '12 >>  MPEC 2012-M05 - "06:02 UT" - Daily Orbit Update

Observers  on 17 June '12

A total of 45 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-M05, 2012-M06, 2012-M07, 2012-M09 & 2012-M10 -- 2012 LZ1, 2012 LW7, 2012 LU, 2012 LT7, 2012 LJ2, 2012 LJ11, 2012 LH11, 2012 LG4, 2012 LF4, 2012 LF11, 2012 LE11, 2012 LD1, 2012 LC1, 2012 KU42, 2012 KM45
A81Balzaretto Obs. in Italy, 1 in MPEC 2012-M05 -- 153958
I99Blanquita Obs. in Spain, 2 in MPEC 2012-M05 -- 2012 LZ1, 2011 WV134
160Castelmartini Obs. in Italy, 9 in MPECs 2012-M05, 2012-M06 & 2012-M07 -- 2012 LZ1, 2012 LU7, 2012 LF11, 2012 LE11, 1994 NK, 329291, 329275, 326732, 153958
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2012-M05, 2012-M06 & 2012-M11 -- 2012 LK11, 2012 LE11, 2012 HG31, 329275, 317685, 163758, 162082, 138847
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-M05 -- 2012 LZ1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-M06 -- 2012 LE11
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-M07 -- 2012 LF11
157Frasso Sabino Obs. in Italy, 3 in MPEC 2012-M05 -- 2012 LU7, 2012 LU, 2012 LD1
203GiaGa Obs. in Italy, 1 in MPEC 2012-M07 -- 2012 LF11
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 308242
J95Great Shefford Obs. in England, 3 in MPECs 2012-M05, 2012-M08 & 2012-M09 -- 2012 LZ1, 2012 LH11, 2012 LG11
046Klet Obs. in the Czech Republic, 2 in MPECs 2012-M06 & 2012-M08 -- 2012 LG11, 2012 LE11
704LINEAR in New Mexico, 8 in MPECs 2012-M05 & 2012-M06 -- 2012 LE11, 2012 LD1, 2011 WV134, 16960, 153958, 141018, 3352, 1685
B33Libbiano Obs. in Italy, 1 in MPEC 2012-M06 -- 2012 LE11
J131National Schools Obs. via the Liverpool Telescope in the Canary Islands, 16 in MPEC 2012-M05 -- 2012 KZ41, 2012 KX, 2012 GC2, 2012 ES14, 2011 QE38, 2011 OY17, 2011 OM5, 2011 EB12, 2010 SV3, 2009 VO24, 2007 VH186, 2006 WO3, 2003 MT9, 2003 BK47, 2002 EM6, 186823
130Lumezzane Obs. in Italy, 6 in MPEC 2012-M05 -- 2012 DH61, 2011 YU62, 2008 JZ30, 329437, 24761, 162854
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-M06 & 2012-M07 -- 2012 LF11, 2012 LE11
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-M05 -- 2010 TK54
932McCarthy Obs. in Connecticut, 1 in MPEC 2012-M07 -- 2012 LF11
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-M05 -- 2009 KJ22
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-M05, 2012-M06, 2012-M09, 2012-M10 & 2012-M11 -- 2012 LK11, 2012 LJ11, 2012 LH11, 2012 LE11, 2011 US63, 2004 FF29, 100756
I89Nerpio Obs. in Italy, 1 in MPEC 2012-M06 -- 2012 LE11
A24New Millennium Obs. in Italy, 4 in MPECs 2012-M07, 2012-M08, 2012-M09 & 2012-M10 -- 2012 LJ11, 2012 LH11, 2012 LG11, 2012 LF11
C47Nonndorf Obs. in Austria, 3 in MPECs 2012-M05 & 2012-M06 -- 2012 LZ1, 2012 LE11, 2007 MM13
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-M05 -- 154007
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2012-M05 & 2012-M07 -- 2012 LF11, 329437, 276397, 251346, 184990
B49Paus Obs. in Spain, 3 in MPECs 2012-M06, 2012-M07 & 2012-M08 -- 2012 LG11, 2012 LF11, 2012 LE11
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-M07 -- 2012 LF11
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPEC 2012-M05 -- 2012 LZ1, 2012 LK9
461SZTE Asteroid Program in Hungary, 2 in MPECs 2012-M06 & 2012-M08 -- 2012 LG11, 2012 LE11
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2012-M06, 2012-M07 & 2012-M11 -- 2012 LK11, 2012 LF11, 2012 LE11
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-M06, 2012-M07, 2012-M10 & 2012-M11 -- 2012 LK11, 2012 LJ11, 2012 LF11, 2012 LE11
H36Sandlot Obs. in Kansas, 5 in MPECs 2012-M06, 2012-M07, 2012-M08, 2012-M10 & 2012-M11 -- 2012 LK11, 2012 LJ11, 2012 LG11, 2012 LF11, 2012 LE11
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-M05 -- 2012 LZ1
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2012-M05 -- 2009 KJ22, 2007 VX7, 88710, 329571, 154007, 136900, 12538
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2012-M05, 2012-M06, 2012-M09, 2012-M10 & 2012-M11 -- 2012 LR1, 2012 LK11, 2012 LJ11, 2012 LH11, 2012 LE11, 2012 EU14
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2012-M06, 2012-M07, 2012-M10 & 2012-M11 -- 2012 LK11, 2012 LJ11, 2012 LF11, 2012 LE11
954Teide Obs. in the Canary Islands, 2 in MPECs 2012-M06 & 2012-M08 -- 2012 LG11, 2012 LE11
B18Terskol Obs. in Russia, 3 in MPECs 2012-M06, 2012-M07 & 2012-M08 -- 2012 LG11, 2012 LF11, 2012 LE11
C92Valdicerro Obs. in Italy, 1 in MPEC 2012-M05 -- 2012 LA11
B42Vitebsk Obs. in Belarus, 2 in MPECs 2012-M06 & 2012-M07 -- 2012 LF11, 2012 LE11
I42Westport Obs., 1 in MPEC 2012-M05 -- 2012 LZ1
718Wiggins Obs. in Utah, 1 in MPEC 2012-M06 -- 2012 LE11
198Wildberg Obs. in Germany, 2 in MPECs 2012-M06 & 2012-M11 -- 2012 LK11, 2012 LE11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 June '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2302 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 CLOMON2 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
2012 LK11JPL Sentry19512023-2110301.0e-06-3.47-3.820JPL: "Analysis based on 27 observations spanning 2.0922 days (2012-Jun-15.36399 to 2012-Jun-17.45616)." Diameter approximately 0.322 km. from mean, weighted H=20.1.
2012 LK9JPL Sentry1643202811.2e-08-3.87-3.870JPL: "Analysis based on 28 observations spanning 4.1795 days (2012-Jun-12.35378 to 2012-Jun-16.533302)." Diameter approximately 0.980 km. from mean, weighted H=17.7.
2012 LR1JPL Sentry16432080-210034.0e-07-3.99-4.000JPL: "Analysis based on 75 observations spanning 6.9280 days (2012-Jun-09.40456 to 2012-Jun-16.3326)." Diameter approximately 0.280 km. from mean, weighted H=20.4.

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 17 June '12

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

1951Noted that JPL Sentry has posted 2012 LK11 as an impact risk - see above
1731Grabbed MPEC 2012-M06 - 2012 LE11 - see above
Grabbed MPEC 2012-M07 - 2012 LF11 - see above
Grabbed MPEC 2012-M08 - 2012 LG11 - see above
Grabbed MPEC 2012-M09 - 2012 LH11 - see above
Grabbed MPEC 2012-M10 - 2012 LJ11 - see above
Grabbed MPEC 2012-M11 - 2012 LK11 - see above
1647Generated Traffic Report
1643Noted that JPL Sentry has updated its 2012 LK9 risk assessment - see above
Noted that JPL Sentry has updated its 2012 LR1 risk assessment - see above
Grabbed MPEC 2012-M05 - Daily Orbit Update - see above
0512Noted Radar Astrometry database update - see above