Contents  on 27 May '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 27 May '12

Two objects reported inside ten LD

Two asteroids are reported moving inside ten lunar distances (LD) of our planet today. Risk-listed intruder 2012 KP24 enters Earth's Hill sphere, passing from 4.72 to 1.85 LD, and 2012 KT12 is within the sphere, now outbound from 3.06 to 3.80 LD.

No other objects are known to be approaching to come within ten LD until November.

This report was generated at 1612 UTC with follow-up in today's DOU MPEC for 2012 KP24.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 27 May '12

The MPC's NEO Confirmation Page has 9 listings

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

New MPECs  on 27 May '12

Minor Planet Electronic Circulars

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

<< DOU on 27 May '12 >>  MPEC 2012-K60 - "06:04 UT" - Daily Orbit Update

Observers  on 27 May '12

Thirteen observers appear in today's MPEC.

CodeObserver / observatory
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-K60 -- 2012 DU30
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2012-K60 -- 2012 FE58, 86039, 68348, 328059, 100926, 5836
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2012-K60 -- 2012 KD6
J95Great Shefford Obs. in England, 3 in MPEC 2012-K60 -- 2012 KP24, 2012 KD6, 2012 JS11
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-K60 -- 2012 KP24
B33Libbiano Obs. in Italy, 1 in MPEC 2012-K60 -- 2012 KP24
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2012-K60 -- 2012 KP24, 2010 LJ14
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-K60 -- 2002 JE9, 312473, 141018
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-K60 -- 2012 KP24, 2012 JB16, 2012 HN40, 2012 HG31, 2011 WV134, 2007 LE, 2006 VY13, 2001 LB, 1999 VP6, 297274, 162082, 153958
J84South Obs. in England, 1 in MPEC 2012-K60 -- 2012 KP24
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2012-K60 -- 2012 GV17
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2012-K60 -- 2011 WV134, 1994 NK
B42Vitebsk Obs. in Belarus, 1 in MPEC 2012-K60 -- 2012 KP24
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 May '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 KP24JPL Sentry1612203212.6e-06-5.71-5.710JPL: "Analysis based on 61 observations spanning 3.7498 days (2012-May-23.33535 to 2012-May-27.08514)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
NEODyS1612203225.27e-06-5.41-5.410NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2012-05-23.336 to 2012-05-27.086."
2012 JS11JPL Sentry1612R E M O V E DJPL: Risk listing removed at 0849 UTC.

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 27 May '12

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

1612Noted that JPL Sentry has removed 2012 JS11 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 KP24 risk assessment - see above
Noted that NEODyS has updated its 2012 KP24 risk assessment - see above
Grabbed MPEC 2012-K60 - Daily Orbit Update - see above
Generated Traffic Report