Contents  on 19 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 19 June '13

No objects reported inside ten LD

No objects are reported flying inside a radius 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 1442 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 19 June '13

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 31 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 19 June '13

Minor Planet Electronic Circulars

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

<< DOU on 19 June '13 >>  MPEC 2013-M21 - "06:09 UT" - Daily Orbit Update

Observers  on 19 June '13

A total of 23 observers appear in today's MPEC.

CodeObserver / observatory
169Airali Obs. in Italy, 1 in MPEC 2013-M21 -- 7753
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-M21 -- 2013 LN31
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2013-M21 -- 65996, 1866, 1627
448Desert Moon Obs. in New Mexico, 2 in MPEC 2013-M21 -- 2013 LK7, 2012 VN82
J95Great Shefford Obs. in England, 1 in MPEC 2013-M21 -- 2011 KE3
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-M21 -- 2010 JA35
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-M21 -- 2002 NV16
C91Montevenere Obs., 2 in MPEC 2013-M21 -- 2009 BL2, 285263
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2013-M21 -- 2004 JN2, 357005, 136900
644NEAT's Mt. Palomar telescope in southern California, 3 in MPEC 2013-M21 -- 2013 AM60, 2012 WB25, 2011 QF3
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 5 in MPEC 2013-M21 -- 2013 JR28, 2005 JE46, 17188, 163249, 152756
G34Oberfrauendorf Obs., 1 in MPEC 2013-M21 -- 137199
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-M21 -- 1866
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2013-M21 -- 2013 LH16, 2013 KB2, 2013 EU9, 2010 TN54, 2002 VR94, 86039, 219021, 7350
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPEC 2013-M21 -- 2013 LN31, 2013 LM31
071Rhozen Obs. in Bulgaria, 1 in MPEC 2013-M21 -- 163249
C95SATINO-1 in France, 2 in MPEC 2013-M21 -- 2013 LC2, 2013 KN6
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-M21 -- 2008 JR26
204Schiaparelli Obs. in Italy, 2 in MPEC 2013-M21 -- 2013 LZ28, 2013 LY28
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2013-M21 -- 2011 QF3
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2013-M21 -- 2012 AU10, 2008 OX2, 2008 KZ5
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2013-M21 -- 2013 LZ28, 2013 LT28, 2013 LL31, 2013 LK7, 2013 LH16, 2013 LG16, 2013 LF16, 2013 LE7, 2013 LE16, 2013 KM6, 2010 UX95, 2009 BE2, 2008 JR26
673!program code "!" (10) via Table Mtn. Obs. in southern California, 1 in MPEC 2013-M21 -- 2013 LN31
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 LZ28JPL Sentry14402039-210647.3e-09-6.70-6.900JPL: "Analysis based on 53 observations spanning 5.0815 days (2013-Jun-13.25363 to 2013-Jun-18.33509)." Diameter approximately 0.110 km. from mean, weighted H=22.5.
NEODyS14402060-210141.54e-08-6.53-6.760NEODyS: "Based on 55 optical observations (of which 3 are rejected as outliers) from 2013-06-13.254 to 2013-06-18.336."
2013 LG16JPL Sentry14402050-2111162.4e-07-3.92-3.930JPL: "Analysis based on 38 observations spanning 10.877 days (2013-Jun-07.41346 to 2013-Jun-18.29081)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
NEODyS14402050-205234.0e-07-3.66-3.940NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2013-06-07.414 to 2013-06-18.292."

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 19 June '13

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

1442Generated Traffic Report
1440Noted 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 LZ28 risk assessment - see above
Noted that NEODyS has updated its 2013 LZ28 risk assessment - see above
Grabbed MPEC 2013-M21 - Daily Orbit Update - see above