Contents  on 4 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 4 July '13

No objects reported inside ten LD

No asteroids are reported moving within ten lunar distances (LD) of our planet today, and none are known to move inside until late this month.

This report was generated at 1425 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 4 July '13

The MPC's NEO Confirmation Page has 30 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 43 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 4 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-N10 - "10:55 UT" - 2013 NX

MPEC 2013-N09 - "10:52 UT" - 2013 NW

MPEC 2013-N08 - "10:48 UT" - 2013 NV

MPEC 2013-N07 - "10:44 UT" - 2013 NU

<< DOU on 4 July '13 >>  MPEC 2013-N06 - "06:02 UT" - Daily Orbit Update

Observers  on 4 July '13

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-N08 -- 2013 NV
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2013-N06, 2013-N07 & 2013-N08 -- 2013 NV, 2013 NU, 2013 JB36, 2013 DR9
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-N06 -- 2013 KN6
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2013-N06 -- 2012 LF11, 2011 EG17
W85LCOGT Cerro Tololo A in Chile, 2 in MPECs 2013-N07 & 2013-N09 -- 2013 NW, 2013 NU
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-N08 -- 2013 NV
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-N06 -- 2012 GB18
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N09 -- 2013 NW
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2013-N06, 2013-N07, 2013-N09 & 2013-N10 -- 2013 NX, 2013 NW, 2013 NU, 2008 MB5, 2005 RO33, 2000 SJ8, 37655, 363305, 354332, 159609
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-N06 -- 2007 XY9
X57Polo Astronomico CMF, 1 in MPEC 2013-N06 -- 52760
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 5 in MPECs 2013-N06 & 2013-N08 -- 2013 NV, 2013 MH7, 2013 LC2, 2013 KR1, 2013 ES89
C95SATINO-1 in France, 1 in MPEC 2013-N06 -- 2012 DA14
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-N10 -- 2013 NX
B74Santa Maria de Montmagastrell Obs. in Spain, 2 in MPECs 2013-N07 & 2013-N10 -- 2013 NX, 2013 NU
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2013-N06 & 2013-N08 -- 2013 NV, 2011 NP, 2005 RO33, 1685
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-N06 -- 2012 OD1
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-N10 -- 2013 NX
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 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 NWJPL Sentry14172030-2111452.2e-07-5.33-6.190JPL: "Analysis based on 10 observations spanning 1.1011 days (2013-Jul-02.34438 to 2013-Jul-03.445512)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
NEODyS14172040-2111194.73e-08-6.04-6.660NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2013-07-02.345 to 2013-07-03.446."
2013 NJNEODyS14172013-201315.57e-06-1.94-1.940NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2013-07-01.317 to 2013-07-03.133."
2010 RF12NEODyS14172095-2112478.55e-02-3.11-3.110NEODyS: "Based on 324 optical observations (of which 5 are rejected as outliers) from 2010-09-05.406 to 2010-09-08.516."
2006 JY26NEODyS14172074-2109421.38e-03-4.84-4.850NEODyS: "Based on 77 optical observations (of which 8 are rejected as outliers) from 2006-05-06.356 to 2006-05-10.175."

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 4 July '13

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

1425Generated Traffic Report
1417Noted that NEODyS has updated its 2006 JY26 risk assessment - see above
Noted that NEODyS has updated its 2010 RF12 risk assessment - see above
Noted that NEODyS has posted 2013 NJ as an impact risk - see above
Noted that JPL Sentry has posted 2013 NW as an impact risk - see above
Noted that NEODyS has posted 2013 NW as an impact risk - see above
Grabbed MPEC 2013-N06 - Daily Orbit Update - see above
Grabbed MPEC 2013-N07 - 2013 NU - see above
Grabbed MPEC 2013-N08 - 2013 NV - see above
Grabbed MPEC 2013-N09 - 2013 NW - see above
Grabbed MPEC 2013-N10 - 2013 NX - see above