Contents  on 12 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 12 May '13

One object reported inside ten LD

One visitor is reported to be within ten lunar distances (LD) of our planet today. 2013 JR7 departs from inside ten LD, traveling from 9.64 to 10.27 LD. Headed our way next, 2009 FE arrives inside ten LD on June 2nd.

This report was generated at 1558 UTC with the discovery of just departed 2013 JV17 (MPEC) and follow-up in today's DOU MPEC for 2013 JF1.

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 12 May '13

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 39 were "one nighters." So far The Tracking News has counted a total of 94 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 12 May '13

Minor Planet Electronic Circulars

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

MPEC 2013-J50 - "13:59 UT" - 2005 VR

MPEC 2013-J49 - "13:00 UT" - 2013 JW17

MPEC 2013-J48 - "12:57 UT" - 2013 JV17

MPEC 2013-J47 - "12:53 UT" - 2013 JU17

MPEC 2013-J46 - "12:49 UT" - 2013 JT17

MPEC 2013-J45 - "12:45 UT" - 2013 JS17

MPEC 2013-J44 - "12:42 UT" - 2013 JR17

<< DOU on 12 May '13 >>  MPEC 2013-J43 - "06:05 UT" - Daily Orbit Update

MPEC 2013-J42 - "04:37 UT" - 2010 KB61

Observers  on 12 May '13

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-J50 -- 2005 VR
I99Blanquita Obs. in Spain, 1 in MPEC 2013-J43 -- 2009 BL2
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2013-J43 -- 2013 HO11, 2008 HO3, 24445, 210012, 1917
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-J45 -- 2013 JS17
G32Elena Remote Obs., 1 in MPEC 2013-J43 -- 246138
J95Great Shefford Obs. in England, 4 in MPECs 2013-J43, 2013-J47, 2013-J48 & 2013-J49 -- 2013 JW17, 2013 JV17, 2013 JU17, 2013 JM14
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2013-J44 -- 2013 JR17
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2013-J45, 2013-J47 & 2013-J48 -- 2013 JV17, 2013 JU17, 2013 JS17
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2013-J44 & 2013-J50 -- 2013 JR17, 2005 VR
474Mt. John Obs. in New Zealand, 20 in MPECs 2013-J42 & 2013-J43 -- 2013 JY2, 2013 JP4, 2013 JF1, 2013 HV14, 2013 HU14, 2013 HL11, 2013 GY73, 2013 GU79, 2013 GR66, 2013 GJ35, 2013 GH84, 2013 GF, 2013 GA80, 2013 EZ108, 2012 XC112, 2012 VO76, 2012 MR4, 2011 UW158, 2010 KB61, 2008 PH9
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-J49 -- 2013 JW17
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2013-J43, 2013-J44, 2013-J45, 2013-J46, 2013-J47, 2013-J48, 2013-J49 & 2013-J50 -- 2013 JW17, 2013 JV17, 2013 JU17, 2013 JT17, 2013 JS17, 2013 JR17, 2005 VR, 337119, 137911, 11054
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2013-J47 & 2013-J49 -- 2013 JW17, 2013 JU17
H36Sandlot Obs. in Kansas, 3 in MPECs 2013-J45, 2013-J47 & 2013-J49 -- 2013 JW17, 2013 JU17, 2013 JS17
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2013-J43, 2013-J44, 2013-J46 & 2013-J50 -- 2013 JT17, 2013 JR17, 2013 JM14, 2013 HG20, 2013 CL118, 2013 BW76, 2005 VR
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 JW17JPL Sentry1459210013.8e-08-7.35-7.350JPL: "Analysis based on 18 observations spanning 1.0082 days (2013-May-11.33732 to 2013-May-12.34555)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2013 JS17JPL Sentry14592075-209965.9e-08-5.99-6.090JPL: "Analysis based on 12 observations spanning 3.9047 days (2013-May-08.44002 to 2013-May-12.34475)." Diameter approximately 0.098 km. from mean, weighted H=22.7.
2013 JM14JPL Sentry1459R E M O V E DJPL: Risk listing removed at 0951 UTC.
NEODyS1459R 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 12 May '13

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

1558Generated Traffic Report
1459Noted that JPL Sentry has removed 2013 JM14 as an impact risk - see above
Noted that NEODyS has removed 2013 JM14 as an impact risk - see above
Noted that JPL Sentry has posted 2013 JS17 as an impact risk - see above
Noted that JPL Sentry has posted 2013 JW17 as an impact risk - see above
Grabbed MPEC 2013-J42 - 2010 KB61 - see above
Grabbed MPEC 2013-J43 - Daily Orbit Update - see above
Grabbed MPEC 2013-J44 - 2013 JR17 - see above
Grabbed MPEC 2013-J45 - 2013 JS17 - see above
Grabbed MPEC 2013-J46 - 2013 JT17 - see above
Grabbed MPEC 2013-J47 - 2013 JU17 - see above
Grabbed MPEC 2013-J48 - 2013 JV17 - see above
Grabbed MPEC 2013-J49 - 2013 JW17 - see above
Grabbed MPEC 2013-J50 - 2005 VR - see above