Contents  on 1 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 1 June '12

Five objects reported inside ten LD

There are five objects reported flying within ten lunar distances (LD) of our planet today. 2012 KC45 is outbound from 5.85 to 7.16 LD, 2012 KT12 from 6.92 to 7.72 LD, and 2012 KZ41 from 8.15 to 8.78 LD. Risk-listed intruder 2012 KP24 leaves ten LD, traveling from 9.64 to 12.51 LD, and intruder 2012 KT42 also departs, moving from 9.68 to 13.26 LD.

No other objects are known to be coming inside ten LD until November.

This report was generated at 1608 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 1 June '12

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen 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 1 June '12

Minor Planet Electronic Circulars

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

MPEC 2012-L03 - "11:24 UT" - 2012 KM45

MPEC 2012-L02 - "11:21 UT" - 2012 KL45

<< DOU on 1 June '12 >>  MPEC 2012-L01 - "06:04 UT" - Daily Orbit Update

Observers  on 1 June '12

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-L01, 2012-L02 & 2012-L03 -- 2012 KX, 2012 KO18, 2012 KN18, 2012 KM45, 2012 KL45, 2012 KC6, 2012 JB16, 2012 HJ1, 2012 DU30, 2012 DO, 2011 YV15, 2010 LJ14, 4487
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-L03 -- 2012 KM45
J95Great Shefford Obs. in England, 1 in MPEC 2012-L03 -- 2012 KM45
704LINEAR in New Mexico, 1 in MPEC 2012-L01 -- 7889
118Modra Obs. in Slovakia, 1 in MPEC 2012-L03 -- 2012 KM45
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-L02 -- 2012 KL45
A24New Millennium Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-L01 -- 326732
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-L01 & 2012-L02 -- 2012 KU42, 2012 KN11, 2012 KL45, 2012 KL11, 2012 KK11, 2012 JU11, 2010 OD101
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-L03 -- 2012 KM45
C44Volta Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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.





Notes for Today's Latest Risk Assessments
2012 KU42JPL Sentry16052035-204221.4e-08-3.53-3.550JPL: "Analysis based on 45 observations spanning 5.9775 days (2012-May-25.44054 to 2012-May-31.41804)." Diameter approximately 1.400 km. from mean, weighted H=16.9.
NEODyS16052035-208941.55e-08-3.64-3.670NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2012-05-25.441 to 2012-05-31.419."

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 1 June '12

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

1608Generated Traffic Report
1605Noted that JPL Sentry has updated its 2012 KU42 risk assessment - see above
Noted that NEODyS has updated its 2012 KU42 risk assessment - see above
Grabbed MPEC 2012-L01 - Daily Orbit Update - see above
Grabbed MPEC 2012-L02 - 2012 KL45 - see above
Grabbed MPEC 2012-L03 - 2012 KM45 - see above