Contents  on 6 July '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 6 July '13

Two objects reported inside ten LD

There are two visitors reported passing within ten lunar distances (LD) of Earth today. 2013 NJ4 is inbound from 4.44 to 4.02 LD and 2013 NH4 comes its closest to Earth this time around, reaching 4.34 LD at 0512 UT.

This report was generated at 1402 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 6 July '13

The MPC's NEO Confirmation Page has 31 listings

When last checked at 2316 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 35 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 6 July '13

Minor Planet Electronic Circulars

As of last check at 2316 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-N20 - "13:10 UT" - 2003 WY25

<< DOU on 6 July '13 >>  MPEC 2013-N19 - "06:02 UT" - Daily Orbit Update

Observers  on 6 July '13

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2013-N19 -- 2013 MY6, 2013 MX5, 2013 MR6, 2001 KO2
I74Baxter Garden Obs. in England, 2 in MPEC 2013-N19 -- 86666, 162269
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-N19 -- 2013 LK31
006Fabra Obs. in Spain, 3 in MPEC 2013-N19 -- 363790, 285263, 17188
F655David Asher in Northern Ireland via Faulkes Telescope North in Hawaii, 5 in MPEC 2013-N19 -- 2013 MX5, 2003 OB4, 363790, 354101, 163249
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-N19 -- 2013 LZ28, 2013 LG16, 2013 JR22
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N20 -- 2003 WY25
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-N20 -- 2003 WY25
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-N19 -- 2013 GZ79, 2010 TN54, 2007 XY9
X57Polo Astronomico CMF, 1 in MPEC 2013-N19 -- 52760
H36Sandlot Obs. in Kansas, 2 in MPEC 2013-N19 -- 2013 LH25, 2013 LF7
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-N19 -- 2005 MC
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2013-N19 -- 2013 NV, 2013 MW6
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N20 -- 2003 WY25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 July '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2316 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 NH6NEODyS14002058-206579.97e-06-3.93-3.960NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2013-07-03.644 to 2013-07-05.452."
2013 NK4NEODyS14002051-211291.03e-07-3.93-4.450NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2013-07-01.788 to 2013-07-04.280."

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 6 July '13

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

1402Generated Traffic Report
1400Noted that NEODyS has posted 2013 NH6 as an impact risk - see above
Noted that NEODyS has posted 2013 NK4 as an impact risk - see above
Grabbed MPEC 2013-N19 - Daily Orbit Update - see above
Grabbed MPEC 2013-N20 - 2003 WY25 - see above