Contents  on 13 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 13 June '13

One object reported inside ten LD

There is one object reported within ten lunar distances (LD) of Earth today. 2013 LD2 is outbound from 7.11 to 7.97 LD. No other objects are known to be approaching the ten-LD "bubble" until late July.

This report was generated at 1349 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 13 June '13

The MPC's NEO Confirmation Page has 13 listings

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

Minor Planet Electronic Circulars

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

MPEC 2013-L65 - "20:42 UT" - 1972 RB

MPEC 2013-L64 - "19:37 UT" - Comet P/2013 CU129 (Panstarrs)

MPEC 2013-L63 - "17:54 UT" - 2013 LT28

<< DOU on 13 June '13 >>  MPEC 2013-L62 - "06:07 UT" - Daily Orbit Update

MPEC 2013-L61 - "04:25 UT" - Comet C/2013 J6 (Catalina)

MPEC 2013-L60 - "04:15 UT" - Comet C/2013 J5 (Boattini)

Observers  on 13 June '13

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-L62 -- 2013 GJ35
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-L64 -- P/2013 CU129
C77Bernezzo Obs. in Italy, 2 in MPEC 2013-L62 -- 2013 LE16, 85989
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-L62 -- 2013 LH16
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2013-L61 & 2013-L62 -- 2013 KN6, C/2013 J6, 2008 HO3, 2002 LT24, 53789
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPEC 2013-L62 -- 2013 LK7, 2013 LH16, 2013 LF7, 2013 LF1, 2013 ES89, 2013 CW35, 2009 LS, 2002 TR190
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-L62 -- 2013 KN6, 2008 VN, 2001 UX4, 281375
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2013-L64 -- P/2013 CU129
J95Great Shefford Obs. in England, 1 in MPEC 2013-L64 -- P/2013 CU129
695]Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-L62 -- 2013 JM14
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2013-L62 -- 163249
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-L62 -- 2013 BP45, 2013 BO45, 2013 BE27
568;program code ";" on Mauna Kea in Hawaii, 1 in MPEC 2013-L62 -- 2008 RG98
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-L64 -- P/2013 CU129
C91Montevenere Obs., 5 in MPEC 2013-L62 -- 85989, 137170, 11405, 3752, 1866
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-L60, 2013-L62, 2013-L63 & 2013-L65 -- 2013 LT28, C/2013 J5, 1972 RB, 4581
A13Naef Obs. in Switzerland, 3 in MPEC 2013-L62 -- 2013 JR28, 2009 BL2, 163249
G34Oberfrauendorf Obs., 1 in MPEC 2013-L62 -- 2013 JR28
C23Olmen Obs. in Belgium, 1 in MPEC 2013-L62 -- 285263
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-L62 -- 1866
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2013-L62 & 2013-L64 -- P/2013 CU129, 2009 NA, 2002 NV16
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2013-L62 -- 2013 LH16, 2013 JR28, 2011 WU95, 2009 BL2, 285263, 163249
C95SATINO-1 in France, 1 in MPEC 2013-L62 -- 2013 KN6
461SZTE Asteroid Program in Hungary, 3 in MPECs 2013-L60, 2013-L61 & 2013-L65 -- C/2013 J6, C/2013 J5, 1972 RB
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-L65 -- 1972 RB
B74Santa Maria de Montmagastrell Obs. in Spain, 2 in MPECs 2013-L61 & 2013-L64 -- C/2013 J6, P/2013 CU129
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-L64 -- P/2013 CU129
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-L62 -- 2005 JE46
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-L62 -- 2013 LH16
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2013-L62 & 2013-L64 -- 2013 LQ6, 2013 LG16, 2013 LE7, 2013 LE16, 2013 LC7, 2013 KY5, 2013 KF6, 2013 JG29, P/2013 CU129, 2013 BK18, 2010 SG13, 345646
I76Tesla Obs. in Spain, 1 in MPEC 2013-L62 -- 2013 JR28
C44Volta Obs. in Italy, 1 in MPEC 2013-L64 -- P/2013 CU129
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 June '13

Summary Risk Table for Risk Assessments Updated Today
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 LT28JPL Sentry20062065-2112135.3e-07-4.90-5.360JPL: "Analysis based on 16 observations spanning 1.0105 days (2013-Jun-12.35352 to 2013-Jun-13.36402)." Diameter approximately 0.121 km. from mean, weighted H=22.2.
2013 LH16JPL Sentry1347207815.0e-10-6.19-6.190JPL: "Analysis based on 60 observations spanning 5.4632 days (2013-Jun-07.47239 to 2013-Jun-12.93554)." Diameter approximately 0.570 km. from mean, weighted H=18.9.
2013 LG16JPL Sentry13472048-2111261.2e-06-3.19-3.360JPL: "Analysis based on 22 observations spanning 5.8056 days (2013-Jun-07.41346 to 2013-Jun-13.2191)." Diameter approximately 0.442 km. from mean, weighted H=19.4.
NEODyS13472048-2111201.69e-06-3.05-3.190NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2013-06-07.414 to 2013-06-13.220."
2013 LE16JPL Sentry1347208411.6e-09-5.62-5.620JPL: "Analysis based on 53 observations spanning 5.9433 days (2013-Jun-07.23871 to 2013-Jun-13.18202)." Diameter approximately 0.650 km. from mean, weighted H=18.6.
NEODyS1347R E M O V E D-

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 13 June '13

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

2100Grabbed MPEC 2013-L65 - 1972 RB - see above
2006Noted that JPL Sentry has posted 2013 LT28 as an impact risk - see above
Grabbed MPEC 2013-L64 - Comet P/2013 CU129 (Panstarrs) - see above
1811Grabbed MPEC 2013-L63 - 2013 LT28 - see above
1349Generated Traffic Report
1347Noted that JPL Sentry has updated its 2013 LE16 risk assessment - see above
Noted that NEODyS has removed 2013 LE16 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 LG16 risk assessment - see above
Noted that NEODyS has updated its 2013 LG16 risk assessment - see above
Noted that JPL Sentry has updated its 2013 LH16 risk assessment - see above
Grabbed MPEC 2013-L60 - Comet C/2013 J5 (Boattini) - see above
Grabbed MPEC 2013-L61 - Comet C/2013 J6 (Catalina) - see above
Grabbed MPEC 2013-L62 - Daily Orbit Update - see above