Contents  on 11 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 11 June '13

Two objects reported inside ten LD

Two objects are reported inside ten lunar distances (LD) of Earth today. Intruder 2013 LR6 is outbound from 6.03 to 8.17 LD, and 2013 LD2 is outbound from 6.09 to 6.46 LD.

This report was generated at 1352 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 11 June '13

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, two 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 11 June '13

Minor Planet Electronic Circulars

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

MPEC 2013-L58 - "20:48 UT" - 2013 LL25

MPEC 2013-L57 - "20:46 UT" - 2013 LK25

MPEC 2013-L56 - "20:43 UT" - 2013 LJ25

MPEC 2013-L55 - "20:40 UT" - 2013 LH25

<< DOU on 11 June '13 >>  MPEC 2013-L54 - "06:07 UT" - Daily Orbit Update

Observers  on 11 June '13

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2013-L55, 2013-L57 & 2013-L58 -- 2013 LL25, 2013 LK25, 2013 LH25
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-L54 -- 2013 LB2
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2013-L54, 2013-L55 & 2013-L58 -- 2013 LL25, 2013 LH25, 85804, 1864
639Dresden Obs. in Germany, 2 in MPEC 2013-L54 -- 285263, 163249
Z81Estrella de Mar Obs., 3 in MPEC 2013-L54 -- 2013 JR28, 285263, 137199
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-L55 -- 2013 LH25
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-L56 -- 2013 LJ25
K57Fiore Obs., 1 in MPEC 2013-L55 -- 2013 LH25
J95Great Shefford Obs. in England, 1 in MPEC 2013-L55 -- 2013 LH25
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2013-L54 & 2013-L55 -- 2013 LH25, 285263
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2013-L54 -- 2013 HP11, 2013 EU9
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2013-L54 -- 2010 JF88, 2004 RA11
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-L56 -- 2013 LJ25
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-L56 & 2013-L58 -- 2013 LL25, 2013 LJ25
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-L54 -- 2005 PY16
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2013-L54, 2013-L55, 2013-L56, 2013-L57 & 2013-L58 -- 2013 LL25, 2013 LK25, 2013 LJ25, 2013 LH25, 2013 KY1, 2009 WE253, 162168, 7341
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-L54 -- 86039
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-L54 -- 2013 LH16
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-L55 -- 2013 LH25
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-L55 -- 2013 LH25
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-L55 & 2013-L56 -- 2013 LJ25, 2013 LH25
204Schiaparelli Obs. in Italy, 2 in MPECs 2013-L55 & 2013-L57 -- 2013 LK25, 2013 LH25
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-L54 -- 285263
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2013-L54, 2013-L55, 2013-L56 & 2013-L57 -- 2013 LK7, 2013 LK25, 2013 LJ25, 2013 LH25, 2013 LE7, 2013 LE16, 2013 KM6, 2013 KL6, 2013 JR28, 2002 QD7, 1996 TP6, 294739, 154275
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-L54 -- 137802
718Wiggins Obs. in Utah, 2 in MPEC 2013-L54 -- 163249, 7888
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 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 LH16JPL Sentry13452024-210982.9e-08-4.04-4.530JPL: "Analysis based on 33 observations spanning 2.8065 days (2013-Jun-07.47239 to 2013-Jun-10.27887)." Diameter approximately 0.646 km. from mean, weighted H=18.6.
2013 LE16NEODyS18172042-210741.71e-06-2.58-2.770NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2013-06-07.239 to 2013-06-11.209."
JPL Sentry13452042-210741.6e-06-2.60-2.790JPL: "Analysis based on 43 observations spanning 3.9693 days (2013-Jun-07.23871 to 2013-Jun-11.208)." Diameter approximately 0.651 km. from mean, weighted H=18.6.

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 11 June '13

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

2103Grabbed MPEC 2013-L55 - 2013 LH25 - see above
Grabbed MPEC 2013-L56 - 2013 LJ25 - see above
Grabbed MPEC 2013-L57 - 2013 LK25 - see above
Grabbed MPEC 2013-L58 - 2013 LL25 - see above
1817Noted that NEODyS has updated its 2013 LE16 risk assessment - see above
1352Generated Traffic Report
1345Noted that JPL Sentry has updated its 2013 LE16 risk assessment - see above
Noted that JPL Sentry has updated its 2013 LH16 risk assessment - see above
Grabbed MPEC 2013-L54 - Daily Orbit Update - see above