Contents  on 23 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 23 June '13

No objects reported inside ten LD

No objects are reported traveling within ten lunar distances (LD) of Earth today, and none are known to be coming in until late July.

This report was generated at 1443 UTC.

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 23 June '13

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2253 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen 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 23 June '13

Minor Planet Electronic Circulars

As of last check at 2253 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-M36 - "15:30 UT" - 2012 HA2

<< DOU on 23 June '13 >>  MPEC 2013-M35 - "06:06 UT" - Daily Orbit Update

Observers  on 23 June '13

Nine observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2013-M35 -- 2013 LN31, 2013 LH25, 2013 LB2, 2013 LB1, 2013 GZ79
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-M35 -- 2013 EW27, 2010 SO16
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 13 in MPEC 2013-M35 -- 2013 FW13, 2013 ED28, 2013 CT82, 2013 BO76, 2013 BO73, 2013 BJ18, 2011 SR5, 2010 KY127, 2010 KR10, 2010 JA35, 2010 HR80, 2009 QL8, 265032
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-M36 -- 2012 HA2
C23Olmen Obs. in Belgium, 1 in MPEC 2013-M35 -- 285263
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-M35 -- 350964
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-M35 -- 163249
C35Terrassa Obs., 1 in MPEC 2013-M35 -- 285263
718Wiggins Obs. in Utah, 2 in MPEC 2013-M35 -- 2013 LN31, 163249
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 June '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2253 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 ED28JPL Sentry1423R E M O V E DJPL: Risk listing removed at 0954 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 23 June '13

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

1807Grabbed MPEC 2013-M36 - 2012 HA2 - see above
1443Generated Traffic Report
1423Noted that JPL Sentry has removed 2013 ED28 as an impact risk - see above
Grabbed MPEC 2013-M35 - Daily Orbit Update - see above