Contents  on 29 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 29 July '13

One object reported inside ten LD

One object is reported to be inside ten lunar distances (LD) of our planet today. 2003 DZ15 is inbound from 9.66 to 9.07 LD. Next known to come this close is 277475 2005 WK4, which arrives inside ten LD on August 6th.

This report was generated at 1306 UTC with follow-up in today's DOU MPEC for 2013 OY3 and 2003 DZ15.

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 29 July '13

The MPC's NEO Confirmation Page has 8 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight objects listed. So far The Tracking News has counted a total of eleven 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 29 July '13

Minor Planet Electronic Circulars

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

MPEC 2013-O62 - "21:08 UT" - 2013 OD4

MPEC 2013-O61 - "15:57 UT" - 2010 XY82

MPEC 2013-O60 - "15:38 UT" - 2013 GZ79

<< DOU on 29 July '13 >>  MPEC 2013-O59 - "06:01 UT" - Daily Orbit Update

Observers  on 29 July '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-O62 -- 2013 OD4
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2013-O59 & 2013-O62 -- 2013 OV2, 2013 OM2, 2013 OG, 2013 OF, 2013 OD4, 2013 NV, 2013 NP11, 2013 NH10, 2013 NC15, 2013 MY6, 2013 MR6, 2013 LB1, 2013 GZ79, 2007 VC138
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2013-O59 & 2013-O62 -- 2013 OD4, 2013 KR1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-O62 -- 2013 OD4
157Frasso Sabino Obs. in Italy, 1 in MPEC 2013-O62 -- 2013 OD4
E94Gisborne Obs. in New Zealand, 1 in MPEC 2013-O62 -- 2013 OD4
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2013-O61 -- 2010 XY82
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-O62 -- 2013 OD4
J75La Sagra Obs. in Spain, 1 in MPEC 2013-O62 -- 2013 OD4
844Los Molinos Obs. in Uruguay, 1 in MPEC 2013-O59 -- 17182
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-O61 -- 2010 XY82
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-O60 -- 2013 GZ79
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-O59 -- 155341
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-O59 -- 2010 TN54, 2010 LG14, 2003 DZ15
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-O62 -- 2013 OD4
Y00SONEAR Obs. in Brazil, 2 in MPECs 2013-O59 & 2013-O62 -- 2013 OY3, 2013 OD4
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-O62 -- 2013 OD4
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2013-O59 & 2013-O62 -- 2013 OU3, 2013 OS3, 2013 OO2, 2013 OD4, 2013 NU, 2013 NK, 2013 NJ, 2013 NG6, 2013 NE15, 2013 MP11, 2013 LW28, 2013 JA29
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-O62 -- 2013 OD4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 OS3JPL Sentry1253R E M O V E DJPL: Risk listing removed at 0949 UTC.
NEODyS1253R E M O V E D-

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 29 July '13

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

2243Grabbed MPEC 2013-O62 - 2013 OD4 - see above
1512Grabbed MPEC 2013-O60 - 2013 GZ79 - see above
Grabbed MPEC 2013-O61 - 2010 XY82 - see above
1306Generated Traffic Report
1253Noted that JPL Sentry has removed 2013 OS3 as an impact risk - see above
Noted that NEODyS has removed 2013 OS3 as an impact risk - see above
Grabbed MPEC 2013-O59 - Daily Orbit Update - see above