Contents  on 22 May '13

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 22 May '13

Five objects reported inside ten LD

Five asteroids are reported moving within ten lunar distances (LD) of our home planet today. Inside Earth's Hill sphere, 2013 KB comes its closest to us on this passage, reaching 3.16 LD at 0605 UT, and 2013 KT1 is outbound from 3.23 to 3.67 LD. More distantly, 2013 KS1 comes its closest to Earth this time around -- 4.80 LD at 1138 UT, 2013 KA is outbound from 5.55 to 6.63 LD, and 2013 KQ1 leaves ten LD, traveling from 9.10 to 10.00 LD.

Coming to the neighborhood next, 2009 FE arrives inside ten LD on June 2nd.

This report was generated at 1344 UTC with first follow-up for 2013 KS1 and departed 2013 JD34 in today's DOU MPEC and follow-up for departed 2013 JF1, plus April observation of distant 68216 2001 CV26.

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 22 May '13

The MPC's NEO Confirmation Page has 1 listing

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed. So far The Tracking News has counted a total of twelve 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 22 May '13

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 2013-K34 - "14:48 UT" - 2010 XD25

<< DOU on 22 May '13 >>  MPEC 2013-K33 - "06:05 UT" - Daily Orbit Update

Observers  on 22 May '13

Twelve observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2013-K33 -- 2013 JR28, 2013 JK22, 2013 JB36, 2013 FY13, 2008 KZ5, 152756, 7350, 3551
I47Auger Obs. in Argentina, 1 in MPEC 2013-K33 -- 285263
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2013-K33 -- 2013 JO4, 2013 GV68, 2009 BL2, 276786, 256412, 8013, 7888
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2013-K33 -- 2013 KZ1, 2013 KY1, 2013 KR1, 2013 JU22, 2013 JR28, 2013 HJ19, 2009 QB36, 1995 LG, 361071, 354101
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-K33 & 2013-K34 -- 2013 JA36, 2010 XD25, 2008 HJ3, 137158
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2013-K33 -- 2000 EU70
A24New Millennium Obs. in Italy, 24 in MPEC 2013-K33 -- 2013 FY13, 2013 EV108, 2009 SQ104, 2009 SC15, 2009 BL2, 2006 GX2, 1999 GR6, 68216, 54686, 357005, 355046, 350988, 275974, 214869, 184990, 163696, 152952, 137199, 8176, 7888, 4034, 2329, 1866, 1864
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-K33 -- 27346
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-K33 -- 2013 JF1
C95SATINO-1 in France, 2 in MPEC 2013-K33 -- 2013 KS1, 137199
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2013-K33 -- 2013 KY1, 2013 JT17, 2013 JS17, 2013 JM14, 2013 JG29, 2013 JD34, 2013 HR11, 2000 EU70
I42Westport Obs. in Massachusetts, 1 in MPEC 2013-K33 -- 2013 EL28
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 May '13

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
2013 JD34NEODyS1812R E M O V E D-
JPL Sentry1341R E M O V E DJPL: Risk listing removed at 0951 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 22 May '13

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

1812Noted that NEODyS has removed 2013 JD34 as an impact risk - see above
1608Grabbed MPEC 2013-K34 - 2010 XD25 - see above
1344Generated Traffic Report
1341Noted that JPL Sentry has removed 2013 JD34 as an impact risk - see above
Grabbed MPEC 2013-K33 - Daily Orbit Update - see above