Contents  on 16 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 16 June '12

Three objects reported inside ten LD

Three visitors are reported to be within ten lunar distances (LD) of our planet today. Newly announced 2012 LA11 is outbound from 6.55 to 7.30 LD. 2012 LT leaves ten LD, moving from 9.80 to 11.37 LD. And 2012 LU comes inside ten LD, passing from 10.94 to 9.89 LD. No other objects are known to be approaching this close until November.

This report was updated at 2350 UTC with new discovery 2012 LA11 (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 LU and 2012 LA as well as distant 2011 YW15. Today's first traffic report was generated at 1612 UTC.


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.

NEOCP Activity  on 16 June '12

The MPC's NEO Confirmation Page has 48 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, 25 were "one nighters." The Tracking News counted a total of 57 listings on the NEOCP on this day.

New MPECs  on 16 June '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there were four MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-M04 - "22:52 UT" - P/2004 H3 = 2012 L4 (Larsen)


MPEC 2012-M03 - "22:06 UT" - 2012 LA11


<< DOU on 16 June '12 >>  MPEC 2012-M02 - "06:02 UT" - Daily Orbit Update


MPEC 2012-M01 - "00:32 UT" - 2012 LL9

Observers  on 16 June '12

A total of 38 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LU, 2012 LR1, 2012 LL9, 2012 LK2, 2012 LJ2, 2012 LG4, 2012 LF4, 2012 LD1, 2012 LC1, 2012 LA11, 2012 LA, 2012 KU42, 2012 KM45, 2012 KC6, 2012 JR17, 2012 JB16, 2012 HO, 2012 HG31, 2008 AF32
160Castelmartini Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 DH61, 329437
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LL9, 2012 LA11, 2012 KU42, 2010 LG14, 20460, 7092
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-M02 -- 2012 LR1, 2012 LP1, 2012 LG4, 2012 JB16
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-M02 -- 2012 JS11, 248818, 141056
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-M02 -- 2012 LU7
151Eschenberg Obs. in Switzerland, 4 in MPECs 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LA11, 2012 HG31, 2011 WV134
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-M03 -- 2012 LA11
203GiaGa Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 HG31, 329275
J95Great Shefford Obs. in England, 1 in MPEC 2012-M01 -- 2012 LL9
857Iowa Robotic Obs. in Arizona, 1 in MPEC 2012-M02 -- 2012 LZ1
695]Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-M02 -- 2011 YU74
704LINEAR in New Mexico, 1 in MPEC 2012-M03 -- 2012 LA11
B33Libbiano Obs. in Italy, 1 in MPEC 2012-M01 -- 2012 LL9
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2012-M01 -- 2012 LL9
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-M02 -- 2011 YW15
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-M02 -- 2012 LD1
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2012-M02 -- 2012 LR1, 2012 DX32, 226219, 162173
A24New Millennium Obs. in Italy, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11
C47Nonndorf Obs. in Austria, 2 in MPEC 2012-M02 -- 2007 MM13, 5626
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPEC 2012-M02 -- 2012 LZ1, 2012 KC6, 2012 JH11, 2002 VP69, 326732, 163732, 143637
B49Paus Obs. in Spain, 1 in MPEC 2012-M02 -- 2012 LU7
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-M02 -- 2012 LZ1, 2012 LU7, 2012 LU, 2012 LD1, 2012 DH61, 2011 WV134
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-M02 -- 2012 LZ1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-M01 -- 2012 LL9
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-M03 -- 2012 LA11
461SZTE Asteroid Program in Hungary, 4 in MPECs 2012-M01, 2012-M02 & 2012-M04 -- 2012 LL9, P/2012 L4, 2004 RU331, 154302
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2012-M03 -- 2012 LA11
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2012-M01, 2012-M02 & 2012-M03 -- 2012 LZ1, 2012 LR1, 2012 LL9, 2012 LA11
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-M03 -- 2012 LA11
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-M02 -- 2012 LZ1
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-M02 -- 2009 NH, 24445
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2012-M02 -- 2012 LR1, 2012 JU4, 2012 JT17, 2012 HY33, 2012 HW1, 2012 HR15, 2012 GD5, 2010 UT7, 2010 JU39, 2008 SX7, 2004 BL86, 2000 RD53, 1998 XN2
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11
A78Stia Obs. in Italy, 2 in MPEC 2012-M02 -- 2012 LC1, 112221
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-M02 -- 2012 LZ1
B18Terskol Obs. in Russia, 2 in MPECs 2012-M01 & 2012-M03 -- 2012 LL9, 2012 LA11
C92Valdicerro Obs. in Italy, 1 in MPEC 2012-M02 -- 2012 LT7
A48Verona Obs. in Italy, 1 in MPEC 2012-M02 -- 2012 LZ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 June '12

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 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 LK9NEODyS16112020-208391.9e-08-3.55-3.830NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2012-06-12.355 to 2012-06-15.255."
JPL Sentry04242020-206731.1e-08-3.71-3.740JPL: "Analysis based on 25 observations spanning 2.9005 days (2012-Jun-12.35378 to 2012-Jun-15.25424)." Diameter approximately 1.005 km. from mean, weighted H=17.6.
2012 LR1JPL Sentry1611208012.8e-07-4.13-4.130JPL: "Analysis based on 72 observations spanning 6.5204 days (2012-Jun-09.40456 to 2012-Jun-15.92499)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS16112080-208953.98e-07-3.99-4.010NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2012-06-09.405 to 2012-06-15.926."

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 16 June '12

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

2359Grabbed MPEC 2012-M04 - P/2004 H3 = 2012 L4 (Larsen) - see above
2350Updated Traffic Report
2224Grabbed MPEC 2012-M03 - 2012 LA11 - see above
1611Noted that NEODyS has posted 2012 LK9 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 LR1 risk assessment - see above
Noted that NEODyS has updated its 2012 LR1 risk assessment - see above
Grabbed MPEC 2012-M02 - Daily Orbit Update - see above
0424Noted that JPL Sentry has posted 2012 LK9 as an impact risk - see above
0047Grabbed MPEC 2012-M01 - 2012 LL9 - see above