Contents  on 10 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 10 May '13

One object reported inside ten LD

There is one object reported to be within a radius of ten lunar distances (LD) from our home world today. 2013 JR7 comes its closest to Earth on this passage, reaching 9.11 LD at 0038 UT. No other objects are known to be coming this close until late July.

This report was generated at 1404 UTC with today's DOU MPEC carrying observation from April 20th of Earth-buzzing 2013 HT25, adding 13.54 hours to that tiny object's 4.50-hour discovery arc. At 0.14 LD this object has the closest passage observed so far this year.

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 10 May '13

The MPC's NEO Confirmation Page has 59 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 59 objects listed. Of these, 42 were "one nighters." So far The Tracking News has counted a total of 78 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 10 May '13

Minor Planet Electronic Circulars

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

MPEC 2013-J39 - "23:30 UT" - 2013 JX14

MPEC 2013-J38 - "21:32 UT" - Comet P/2013 J2 (McNaught)

MPEC 2013-J37 - "21:18 UT" - 2013 JM14

MPEC 2013-J36 - "21:13 UT" - 2013 JL14

MPEC 2013-J35 - "16:44 UT" - 2013 JK14

MPEC 2013-J34 - "16:34 UT" - 2013 JH14

<< DOU on 10 May '13 >>  MPEC 2013-J33 - "06:04 UT" - Daily Orbit Update

Observers  on 10 May '13

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-J33 -- 242643
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2013-J33 -- 2013 JX2, 2013 HO11, 2013 GU68, 2013 FQ10, 2013 FD11, 2012 TA219, 1998 FJ74
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2013-J33 & 2013-J38 -- P/2013 J2, 354952
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-J33 -- 2013 GF, 2002 TR190
G32Elena Remote Obs., 1 in MPEC 2013-J33 -- 246138
C73Galati Obs. in Romania, 1 in MPEC 2013-J33 -- 144332
J95Great Shefford Obs. in England, 2 in MPECs 2013-J33 & 2013-J36 -- 2013 JL14, 2013 HT25
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-J35 -- 2013 JK14
K93LCOGT Sutherland C in South Africa, 3 in MPECs 2013-J33, 2013-J35 & 2013-J39 -- 2013 JX14, 2013 JK14, 1997 WQ23
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-J36 -- 2013 JL14
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-J39 -- 2013 JX14
C91Montevenere Obs., 2 in MPEC 2013-J33 -- 2013 FY13, 7888
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-J33, 2013-J34 & 2013-J37 -- 2013 JM14, 2013 JH14, 276732, 242643
C47Nonndorf Obs. in Austria, 1 in MPEC 2013-J33 -- 2009 BL2
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-J34 -- 2013 JH14
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-J33, 2013-J35, 2013-J36 & 2013-J39 -- 2013 JX14, 2013 JL14, 2013 JK14, 2006 HB, 2005 GO22, 99942, 355770, 246138, 243298, 154347, 154229
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-J34 & 2013-J37 -- 2013 JM14, 2013 JH14
033Schwarzschild Obs. in Germany, 1 in MPEC 2013-J33 -- 2013 JP4
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2013-J33 & 2013-J38 -- P/2013 J2, 7753, 2063
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2013-J33 -- 2000 BE19
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-J33 -- 242643
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-J33 -- 350462
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-J33 -- 2013 HP11
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-J33 & 2013-J37 -- 2013 JM14, 2013 GY68
673Table Mtn. Obs. in southern California, 1 in MPEC 2013-J33 -- 2013 EV108
673!program code "!" (10) via Table Mtn. Obs. in southern California, 3 in MPEC 2013-J33 -- 2013 FZ7, 2013 EV108, 2013 EO126
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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 JM14JPL Sentry2359202711.1e-10-7.69-7.690JPL: "Analysis based on 18 observations spanning 1.0457 days (2013-May-09.34914 to 2013-May-10.3948)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2013 JH14JPL Sentry2007210914.6e-10-8.20-8.200JPL: "Analysis based on 14 observations spanning 5.0255 days (2013-May-05.19133 to 2013-May-10.21685)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2013 HT25JPL Sentry1402R E M O V E DJPL: Risk listing removed at 0956 UTC.
NEODyS1402R 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 10 May '13

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

2359Noted that JPL Sentry has posted 2013 JM14 as an impact risk - see above
Grabbed MPEC 2013-J39 - 2013 JX14 - see above
2229Grabbed MPEC 2013-J36 - 2013 JL14 - see above
Grabbed MPEC 2013-J37 - 2013 JM14 - see above
Grabbed MPEC 2013-J38 - Comet P/2013 J2 (McNaught) - see above
2007Noted that JPL Sentry has posted 2013 JH14 as an impact risk - see above
1717Grabbed MPEC 2013-J34 - 2013 JH14 - see above
Grabbed MPEC 2013-J35 - 2013 JK14 - see above
1404Generated Traffic Report
1402Noted that JPL Sentry has removed 2013 HT25 as an impact risk - see above
Noted that NEODyS has removed 2013 HT25 as an impact risk - see above
Grabbed MPEC 2013-J33 - Daily Orbit Update - see above