Contents  on 26 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 26 June '13

No objects reported inside ten LD

There are no asteroids reported passing inside ten lunar distances (LD) of Earth today, and none are known to be coming in until late July.

This report was generated at 1347 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.

Radar Astrometry  on 26 June '13

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2119 UTC when the database was dated 26 June

Data update noted at 2321 UTC when the database was dated 26 June

NEOCP Activity  on 26 June '13

The MPC's NEO Confirmation Page has 8 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of eleven listings on the NEOCP today.

New MPECs  on 26 June '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-M42 - "19:03 UT" - 2013 MY6

<< DOU on 26 June '13 >>  MPEC 2013-M41 - "06:02 UT" - Daily Orbit Update

MPEC 2013-M40 - "04:27 UT" - 2009 WM1

Observers  on 26 June '13

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2004 KH17, 340666
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2013-M41 & 2013-M42 -- 2013 MY6, 2013 ML3, 2013 LN31, 2013 LK31, 2013 LC2, 2002 LT24, 354952, 285263, 163249, 137199
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-M41 -- 2013 ML3
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-M42 -- 2013 MY6
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2013-M41 -- 2013 LN31, 363305
203GiaGa Obs. in Italy, 1 in MPEC 2013-M41 -- 2013 LK31
J95Great Shefford Obs. in England, 3 in MPECs 2013-M41 & 2013-M42 -- 2013 MY6, 2013 ML3, 2013 LN31
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-M41 -- 363626
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2013-M40 & 2013-M41 -- 2013 LE7, 2009 WM1, 363305
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2013-M41 & 2013-M42 -- 2013 MY6, 2013 LK25, 2013 LH25, 2013 LF7, 2013 LE16, 2013 LD1
0891program code 1 via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-M41 -- 163249
C23Olmen Obs. in Belgium, 2 in MPEC 2013-M41 -- 2013 LN31, 7753
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-M42 -- 2013 MY6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 June '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 ML3JPL Sentry1329210942.3e-06-4.60-5.030JPL: "Analysis based on 60 observations spanning 6.6515 days (2013-Jun-19.27039 to 2013-Jun-25.92194)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS13292109-210941.85e-06-4.69-4.940NEODyS: "Based on 63 optical observations (of which 4 are rejected as outliers) from 2013-06-19.271 to 2013-06-25.923."
2013 HT14JPL Sentry23592024-207741.2e-06-6.33-6.460JPL: "Analysis based on 23 observations spanning 2.0169 days (2013-Apr-21.25884 to 2013-Apr-23.27569)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
2013 BL18JPL Sentry23212070-209251.9e-05-5.28-5.430JPL: "Analysis based on 27 observations spanning 15.283 days (2013-Jan-17.28384 to 2013-Feb-01.567256)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
2009 WM1JPL Sentry1329R E M O V E DJPL: Risk listing removed at 0557 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 26 June '13

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

2359Noted that JPL Sentry has updated its 2013 HT14 risk assessment - see above
2321Noted that JPL Sentry has updated its 2013 BL18 risk assessment - see above
Noted Radar Astrometry database update - see above
2119Noted Radar Astrometry database update - see above
2007Grabbed MPEC 2013-M42 - 2013 MY6 - see above
1347Generated Traffic Report
1329Noted that JPL Sentry has removed 2009 WM1 as an impact risk - see above
Noted 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-M40 - 2009 WM1 - see above
Grabbed MPEC 2013-M41 - Daily Orbit Update - see above