Contents  on 15 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 15 May '13

One object reported inside ten LD

There is one object reported to be within ten lunar distances (LD) of Earth today. Risk-listed 2013 JM22 comes inside ten LD, passing from 13.13 to 8.82 LD. Coming to the neighborhood next, 2009 FE arrives inside ten LD on June 2nd.

This report was generated at 1302 UTC with first follow-up in today's DOU MPEC for 2013 JM22.

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 15 May '13

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 61 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 15 May '13

Minor Planet Electronic Circulars

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

MPEC 2013-J71 - "18:23 UT" - 2013 JT28

MPEC 2013-J70 - "18:17 UT" - 2013 JR28

<< DOU on 15 May '13 >>  MPEC 2013-J69 - "06:04 UT" - Daily Orbit Update

Observers  on 15 May '13

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-J69 -- 2013 HO11
G36CASADO in Spain, 1 in MPEC 2013-J69 -- 163249
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-J69 -- 184990
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2013-J69 -- 2013 JR22, 2013 JL22, 2013 HV14, 2013 HJ19, 2013 HG20, 2013 EW27
448Desert Moon Obs. in New Mexico, 2 in MPEC 2013-J69 -- 2013 GY68, 163696
J95Great Shefford Obs. in England, 1 in MPEC 2013-J69 -- 2013 JM22
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-J69 -- 4034
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-J70 -- 2013 JR28
704LINEAR in New Mexico, 1 in MPEC 2013-J69 -- 2011 WU95
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2013-J69 -- 2013 JL22, 2013 FD11, 2013 EU9
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-J71 -- 2013 JT28
C91Montevenere Obs., 4 in MPEC 2013-J69 -- 2013 FY13, 2009 BL2, 7977, 4034
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-J69 & 2013-J70 -- 2013 JR28, 2013 JK14
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-J69 -- 360191
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2013-J69 -- 2013 JX2, 2013 GZ79, 1866
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2013-J69 & 2013-J71 -- 2013 JT28, 4486, 3102
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2013-J69 -- 2013 JM22, 2013 EU9
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2013-J69 -- 2013 JM22, 2013 EU9, 2011 WU95, 2009 SQ104, 2009 BL2
033Schwarzschild Obs. in Germany, 1 in MPEC 2013-J70 -- 2013 JR28
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-J69 -- 4957
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-J69 -- 2013 HN11, 350462
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2013-J69 & 2013-J71 -- 2013 JT28, 2013 JN7, 2013 GS66
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 JR28JPL Sentry20042053-208269.4e-09-6.12-6.650JPL: "Analysis based on 25 observations spanning 2.5058 days (2013-May-12.43344 to 2013-May-14.939258)." Diameter approximately 0.192 km. from mean, weighted H=21.2.
2013 JM22JPL Sentry1259209516.2e-08-6.11-6.110JPL: "Analysis based on 50 observations spanning 2.5931 days (2013-May-12.34486 to 2013-May-14.93799)." Diameter approximately 0.077 km. from mean, weighted H=23.2.
NEODyS12592095-209516.36e-08-6.10-6.10NEODyS: "Based on 54 optical observations (of which 5 are rejected as outliers) from 2013-05-12.346 to 2013-05-14.939."

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 15 May '13

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

2004Noted that JPL Sentry has posted 2013 JR28 as an impact risk - see above
1833Grabbed MPEC 2013-J70 - 2013 JR28 - see above
Grabbed MPEC 2013-J71 - 2013 JT28 - see above
1302Generated Traffic Report
1259Noted that JPL Sentry has updated its 2013 JM22 risk assessment - see above
Noted that NEODyS has updated its 2013 JM22 risk assessment - see above
Grabbed MPEC 2013-J69 - Daily Orbit Update - see above