Contents  on 8 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 8 July '13

Two objects reported inside ten LD

Two objects are reported flying inside ten lunar distances (LD) from Earth today. 2013 NJ4 is outbound from 3.95 to 4.23 LD and 2013 NH4 from 6.95 to 9.52 LD.

This report was generated at 1355 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 8 July '13

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2358 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 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 8 July '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-N30 - "16:48 UT" - 2013 NQ8

MPEC 2013-N29 - "11:30 UT" - 2013 NP8

MPEC 2013-N28 - "11:23 UT" - 2013 MS11

<< DOU on 8 July '13 >>  MPEC 2013-N27 - "06:02 UT" - Daily Orbit Update

MPEC 2013-N26 - "01:42 UT" - 2013 NM8

Observers  on 8 July '13

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2013-N29 & 2013-N30 -- 2013 NQ8, 2013 NP8
I74Baxter Garden Obs. in England, 1 in MPEC 2013-N27 -- 2013 ML3
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-N27 -- 163249
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-N27 -- 54789
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2013-N27 -- 2013 NK, 2013 MY5, 2013 MQ, 2011 UW158, 2009 XF2, 2008 PH9
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-N30 -- 2013 NQ8
J95Great Shefford Obs. in England, 1 in MPEC 2013-N30 -- 2013 NQ8
J75La Sagra Obs. in Spain, 1 in MPEC 2013-N30 -- 2013 NQ8
5682David Tholen's team on Mauna Kea in Hawaii, 6 in MPEC 2013-N27 -- 2013 NW, 2013 MZ5, 2013 ML3, 2013 LZ28, 2013 JM7, 2013 FQ10
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N26 -- 2013 NM8
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-N27 -- 2010 TN54
474Mt. John Obs. in New Zealand, 1 in MPEC 2013-N30 -- 2013 NQ8
A13Naef Obs. in Switzerland, 5 in MPEC 2013-N27 -- 2007 XY9, 363305, 163364, 7350, 5332
G34Oberfrauendorf Obs., 1 in MPEC 2013-N27 -- 285263
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N27 -- 2007 XY9
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2013-N26, 2013-N27 & 2013-N28 -- 2013 NM8, 2013 MS11, 2013 LB1
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-N27 -- 2013 EW128
204Schiaparelli Obs. in Italy, 12 in MPEC 2013-N27 -- 2013 LL25, 2013 LB2, 2013 LB1, 2013 JT22, 2013 JR28, 2013 JK22, 2008 HO3, 2006 HB, 2005 MO13, 2002 LT24, 365014, 363790
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2013-N27 & 2013-N29 -- 2013 NP8, 2013 NH6
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2013-N27 & 2013-N28 -- 2013 MS11, 2013 BC18
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-N28 -- 2013 MS11
I89iTelescope Obs. Nerpio in Spain, 2 in MPEC 2013-N27 -- 285263, 163249
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N30 -- 2013 NQ8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 July '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 NH6JPL Sentry13522060-206129.4e-06-3.97-3.970JPL: "Analysis based on 25 observations spanning 4.0683 days (2013-Jul-03.642839 to 2013-Jul-07.71113)." Diameter approximately 0.070 km. from mean, weighted H=23.4.
NEODyS13522060-206549.12e-06-3.98-3.990NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-07-03.644 to 2013-07-07.712."
2013 NWJPL Sentry13522079-209738.3e-08-5.92-5.950JPL: "Analysis based on 16 observations spanning 4.1196 days (2013-Jul-02.34438 to 2013-Jul-06.464027)." Diameter approximately 0.111 km. from mean, weighted H=22.4.
NEODyS13522079-209738.04e-08-6.00-6.070NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2013-07-02.345 to 2013-07-06.465."
2013 ML3JPL Sentry1352210947.9e-07-5.17-5.450JPL: "Analysis based on 142 observations spanning 17.771 days (2013-Jun-19.27039 to 2013-Jul-07.04154)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS13522109-210942.32e-06-4.71-4.860NEODyS: "Based on 144 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-07.042."

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 8 July '13

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

1708Grabbed MPEC 2013-N30 - 2013 NQ8 - see above
1355Generated Traffic Report
1352Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Noted that JPL Sentry has updated its 2013 NH6 risk assessment - see above
Noted that NEODyS has updated its 2013 NH6 risk assessment - see above
Noted that JPL Sentry has updated its 2013 NW risk assessment - see above
Noted that NEODyS has updated its 2013 NW risk assessment - see above
Grabbed MPEC 2013-N27 - Daily Orbit Update - see above
Grabbed MPEC 2013-N28 - 2013 MS11 - see above
Grabbed MPEC 2013-N29 - 2013 NP8 - see above
0331Grabbed MPEC 2013-N26 - 2013 NM8 - see above