Contents  on 22 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 22 June '13

No objects reported inside ten LD

No asteroids are known to be inside a radius of ten lunar distances (LD) from our home world today, and none are known to be coming in until late July.

This report was generated at 1320 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 22 June '13

The MPC's NEO Confirmation Page has 14 listings

When last checked at 2311 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fourteen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 20 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 22 June '13

Minor Planet Electronic Circulars

As of last check at 2311 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-M34 - "17:58 UT" - 2013 MR6

<< DOU on 22 June '13 >>  MPEC 2013-M33 - "06:05 UT" - Daily Orbit Update

Observers  on 22 June '13

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2013-M33 & 2013-M34 -- 2013 MY5, 2013 MR6, 2013 MQ, 2013 LE16, 2013 LB2, 2013 LB1, 2013 KJ6, 2013 JK22, 359592, 17188, 170013, 11405, 7888, 7753
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2013-M33 -- 2013 LE16, 2005 JE46, 276786, 24445, 7888, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2013-M33 -- 2013 LK25, 2013 JB36, 2013 ES89, 2005 EJ94, 2003 RM, 2000 JF1
A27Eridanus Obs. in Germany, 1 in MPEC 2013-M33 -- 285263
006Fabra Obs. in Spain, 1 in MPEC 2013-M33 -- 285263
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 16 in MPEC 2013-M33 -- 2013 JM14, 2012 XD112, 2012 VF37, 2011 BT15, 2010 OS22, 2010 OF101, 2010 NG1, 2010 LT108, 2010 JA35, 2010 HZ108, 2009 UK, 2007 MK13, 2006 WJ3, 2006 OC5, 2004 TB18, 265032
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-M33 -- 2013 LZ28
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-M33 & 2013-M34 -- 2013 MR6, 9950
0891program code 1 via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-M33 -- 163249
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-M33 -- 163249
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2013-M33 -- 2013 GZ79, 163249
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2013-M33 -- 285263, 163249
C95SATINO-1 in France, 2 in MPEC 2013-M33 -- 2013 LK25, 2013 KN6
6731program code 1 via Table Mtn. Obs. in southern California, 1 in MPEC 2013-M33 -- 163249
F85Tiki Obs. in Tahiti, 1 in MPEC 2013-M33 -- 2008 CY21
718Wiggins Obs. in Utah, 3 in MPEC 2013-M33 -- 2013 LN31, 163249, 7888
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 June '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2311 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 LZ28NEODyS13192101-210111.67e-08-6.67-6.670NEODyS: "Based on 61 optical observations (of which 3 are rejected as outliers) from 2013-06-13.254 to 2013-06-21.395."
JPL Sentry1319R E M O V E DJPL: Risk listing removed at 0950 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 22 June '13

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

1916Grabbed MPEC 2013-M34 - 2013 MR6 - see above
1320Generated Traffic Report
1319Noted that JPL Sentry has removed 2013 LZ28 as an impact risk - see above
Noted that NEODyS has updated its 2013 LZ28 risk assessment - see above
Grabbed MPEC 2013-M33 - Daily Orbit Update - see above