Contents  on 25 June '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 25 June '13

No objects reported inside ten LD

There are no visitors reported flying inside ten lunar distances (LD) of our planet today.

This report was generated at 1406 UTC with today's DOU MPEC reporting observation of distant 68216 2001 CV26 from February.

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 25 June '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 1958 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of eight 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 25 June '13

Minor Planet Electronic Circulars

As of last check at 1958 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-M39 - "19:44 UT" - 2013 MW6

<< DOU on 25 June '13 >>  MPEC 2013-M38 - "06:02 UT" - Daily Orbit Update

Observers  on 25 June '13

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-M38 -- 2013 LN31
300Bisei Spaceguard Center in Japan, 7 in MPEC 2013-M38 -- 2008 DG17, 68216, 137805, 137199, 11405, 5828, 1036
I99Blanquita Obs. in Spain, 2 in MPEC 2013-M38 -- 285263, 163249
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-M38 -- 5332
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2013-M38 & 2013-M39 -- 2013 MW6, 2013 MD6, 2013 LM31, 2013 LH29, 2013 KR1, 2013 JX2, 2013 JT22, 2013 FD11
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-M39 -- 2013 MW6
Z81Estrella de Mar Obs., 2 in MPEC 2013-M38 -- 2006 NL, 159609
006Fabra Obs. in Spain, 1 in MPEC 2013-M38 -- 285263
203GiaGa Obs. in Italy, 2 in MPEC 2013-M38 -- 2013 LN31, 354952
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-M38 -- 163249
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-M38 -- 2013 LN31
C95SATINO-1 in France, 2 in MPEC 2013-M38 -- 2013 ML3, 2013 KN6
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-M39 -- 2013 MW6
Q62"program code '"' (11) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-M39 -- 2013 MW6
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-M39 -- 2013 MW6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 June '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1958 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 ML3JPL Sentry1347210942.4e-06-4.58-5.030JPL: "Analysis based on 50 observations spanning 4.7471 days (2013-Jun-19.27039 to 2013-Jun-24.01745)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS13472076-210957.88e-06-4.05-4.170NEODyS: "Based on 53 optical observations (of which 4 are rejected as outliers) from 2013-06-19.271 to 2013-06-24.018."

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 25 June '13

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

1958Grabbed MPEC 2013-M39 - 2013 MW6 - see above
1406Generated Traffic Report
1347Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-M38 - Daily Orbit Update - see above