Contents  on 20 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 20 June '12

Three objects reported inside ten LD

Three objects are reported traveling within ten lunar distances (LD) of our planet today. 2012 LU is inbound from 7.18 to 6.51 LD and newly announced 2012 MY2 from 8.2 to 7.4 LD*. And 2012 LA11 departs from inside ten LD, passing from 9.66 to 10.47 LD. No other objects are known to be coming this close until November.

This report was updated at 2208 UTC with new discovery 2012 MY2 (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 LA11. Today's first traffic report was generated at 1504 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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 20 June '12

The MPC's NEO Confirmation Page has 14 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fourteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 32 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 20 June '12

Minor Planet Electronic Circulars

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


MPEC 2012-M26 - "20:12 UT" - 2012 MY2


MPEC 2012-M25 - "20:10 UT" - 2012 MX2


MPEC 2012-M24 - "13:43 UT" - 2012 MU2


<< DOU on 20 June '12 >>  MPEC 2012-M23 - "06:02 UT" - Daily Orbit Update

Observers  on 20 June '12

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2012-M23, 2012-M24 & 2012-M26 -- 2012 MY2, 2012 MU2, 2012 LZ1, 2012 LU7, 2012 LL9, 2012 LK9, 2012 LJ2, 2012 LJ11, 2012 LH11, 2012 LG11, 2012 LF4, 2012 LF11, 2012 LD1, 2012 LA11, 2012 KF47, 2006 BZ7
160Castelmartini Obs. in Italy, 8 in MPEC 2012-M23 -- 2012 LZ1, 2012 LU7, 2012 DH61, 329437, 329291, 329275, 326732, 153958
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2012-M23 & 2012-M24 -- 2012 MU2, 1984 QY1, 88254, 326732, 242191, 3752, 3103
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-M23 -- 2012 LZ1, 2012 LC1
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2012-M24 & 2012-M26 -- 2012 MY2, 2012 MU2
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-M23 -- 2006 BZ7
857Iowa Robotic Obs. in Arizona, 1 in MPEC 2012-M23 -- 2012 LZ1
704LINEAR in New Mexico, 4 in MPEC 2012-M23 -- 2004 XK35, 67367, 141056, 2201
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-M24 & 2012-M26 -- 2012 MY2, 2012 MU2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-M23 -- 2012 DV43
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2012-M23, 2012-M24, 2012-M25 & 2012-M26 -- 2012 MY2, 2012 MX2, 2012 MU2, 2006 BZ7, 85628
J93Mt. Tuffley Obs. in England, 1 in MPEC 2012-M23 -- 5587
J69North Obs. in England, 1 in MPEC 2012-M23 -- 1984 QY1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2012-M23 -- 2012 LZ1, 2012 LU7, 2012 LG11, 2012 LF11, 2012 LE11, 2012 HG31, 2011 WV134, 2007 MT20, 1994 NK
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-M23 -- 2012 LG11
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2012-M23 -- 2012 LZ1, 2006 BZ7
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-M23 & 2012-M26 -- 2012 MY2, 2006 BZ7
510Siegen Obs. in Germany, 1 in MPEC 2012-M23 -- 2012 LZ1
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2012-M23 -- 2012 MP, 88710, 24445, 12538
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2012-M23 -- 2012 MQ, 2012 LR1, 2012 LQ7, 2012 LK11, 2012 LD13, 2012 KK11, 2012 JS17, 2010 LR33, 2003 MK4
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2012-M23 -- 2012 LZ1
C92Valdicerro Obs. in Italy, 2 in MPECs 2012-M23 & 2012-M24 -- 2012 MU2, 2006 BZ7
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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 MY2JPL Sentry22342056-2110568.6e-06-5.96-6.730JPL: "Analysis based on 19 observations spanning 1.0152 days (2012-Jun-19.18552 to 2012-Jun-20.20071)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2012 LK11JPL Sentry15002023-2107142.5e-06-3.00-3.100JPL: "Analysis based on 39 observations spanning 4.0189 days (2012-Jun-15.36399 to 2012-Jun-19.38293)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS15002023-207592.5e-06-2.98-3.090NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2012-06-15.365 to 2012-06-19.384."
2012 LK9JPL Sentry15002024-208776.9e-08-3.10-3.150JPL: "Analysis based on 37 observations spanning 6.8081 days (2012-Jun-12.35378 to 2012-Jun-19.161853)." Diameter approximately 1.002 km. from mean, weighted H=17.7.
NEODyS15002020-2090121.62e-07-2.53-2.650NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2012-06-12.355 to 2012-06-19.163."
2012 LR1JPL Sentry1500208017.2e-08-4.74-4.740JPL: "Analysis based on 84 observations spanning 9.8978 days (2012-Jun-09.40456 to 2012-Jun-19.30241)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS1500R E M O V E D-

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 20 June '12

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

2234Noted that JPL Sentry has posted 2012 MY2 as an impact risk - see above
2208Updated Traffic Report
2111Grabbed MPEC 2012-M25 - 2012 MX2 - see above
Grabbed MPEC 2012-M26 - 2012 MY2 - see above
1500Noted that JPL Sentry has updated its 2012 LK11 risk assessment - see above
Noted that NEODyS has updated its 2012 LK11 risk assessment - see above
Noted that JPL Sentry has updated its 2012 LK9 risk assessment - see above
Noted that NEODyS has updated its 2012 LK9 risk assessment - see above
Noted that JPL Sentry has updated its 2012 LR1 risk assessment - see above
Noted that NEODyS has removed 2012 LR1 as an impact risk - see above
Grabbed MPEC 2012-M23 - Daily Orbit Update - see above
Grabbed MPEC 2012-M24 - 2012 MU2 - see above