Contents  on 26 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 26 May '12

Three objects reported inside ten LD

There are three objects reported flying within ten lunar distances (LD) of our planet today. Inside Earth's Hill sphere, 2012 KT12 is outbound from 2.37 to 3.06 LD. Further away, risk-listed intruder 2012 KP24 is inbound from 7.58 to 4.72 LD and 2012 KW exits ten LD, passing from 9.96 to 12.12 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 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 26 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, five were "one nighters."

New MPECs  on 26 May '12

Minor Planet Electronic Circulars

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

MPEC 2012-K59 - "14:51 UT" - 2011 KW15

<< DOU on 26 May '12 >>  MPEC 2012-K58 - "06:04 UT" - Daily Orbit Update

Observers  on 26 May '12

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPEC 2012-K58 -- 2012 KN18, 2012 GV11
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2012-K58 -- 2012 JB16, 163732
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-K58 -- 2012 KL11
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2012-K58 -- 2012 KA4
151Eschenberg Obs. in Switzerland, 5 in MPEC 2012-K58 -- 2012 HJ1, 2012 HG31, 2011 WV134, 2009 AV, 2002 OA22
J95Great Shefford Obs. in England, 4 in MPEC 2012-K58 -- 2012 KP24, 2012 KN18, 2012 KD6, 2012 KC6
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-K58 -- 2012 KP24
704LINEAR in New Mexico, 1 in MPEC 2012-K58 -- 2011 YU62
C01Lohrmann Obs. in Germany, 1 in MPEC 2012-K58 -- 86667
130Lumezzane Obs. in Italy, 7 in MPEC 2012-K58 -- 2012 KX, 2012 JB16, 2012 HG31, 2012 GX11, 312473, 153958, 4034
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2012-K58 & 2012-K59 -- 2012 KY3, 2011 KW15, 162173
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2012-K58 -- 2012 JB16, 2012 GX11, 2006 VY13
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-K58 -- 141531
J93Mt. Tuffley Obs. in England, 2 in MPEC 2012-K58 -- 2011 WV134, 141018
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-K58 -- 141526
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-K58 -- 2008 XE3, 318050, 154007
033Schwarzschild Obs. in Germany, 5 in MPEC 2012-K58 -- 2012 KN18, 2012 KF25, 2012 KB6, 2012 JR4, 2007 MT20
510Siegen Obs. in Germany, 1 in MPEC 2012-K58 -- 2012 KP24
I93St. Pardon de Conques Obs. in France, 3 in MPEC 2012-K58 -- 2012 KP24, 2012 KF25, 2006 KV86
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-K58 -- 2008 XE3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 May '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2359 and NEODyS at 2311 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 Sentry1600203211.2e-06-6.03-6.030JPL: "Analysis based on 28 observations spanning 2.6719 days (2012-May-23.33535 to 2012-May-26.00724)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
NEODyS1600203211.63e-06-5.89-5.890NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2012-05-23.336 to 2012-05-26.008."
2012 KN18NEODyS1600R E M O V E D-
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 0850 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 26 May '12

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

1647Generated Traffic Report
1610Grabbed MPEC 2012-K58 - Daily Orbit Update - see above
1600Noted that JPL Sentry has removed 2012 KN18 as an impact risk - see above
Noted that NEODyS has removed 2012 KN18 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-K59 - 2011 KW15 - see above