Contents  on 19 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 19 July '13

No objects reported inside ten LD

There are no visitors reported moving within ten lunar distances (LD) of our home world today. Next known to be possibly approaching are 2006 BL8, which may arrive inside ten LD on July 24th (uncertainty +/- two days), and 2003 DZ15, maybe arriving on July 29th (+/- 26.5 hours).

This report was generated at 1431 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 July '13

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 50 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 July '13

Minor Planet Electronic Circulars

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

MPEC 2013-O27 - "22:36 UT" - 2013 OW2

MPEC 2013-O26 - "22:32 UT" - 2013 OV2

MPEC 2013-O25 - "13:47 UT" - 2003 KZ18

MPEC 2013-O24 - "13:14 UT" - 2013 OO2

MPEC 2013-O23 - "13:10 UT" - 2013 ON2

MPEC 2013-O22 - "13:06 UT" - 2013 OM2

MPEC 2013-O21 - "13:03 UT" - 2013 NX23

MPEC 2013-O20 - "12:51 UT" - 2011 WO4

<< DOU on 19 July '13 >>  MPEC 2013-O19 - "06:03 UT" - Daily Orbit Update

Observers  on 19 July '13

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2013-O19, 2013-O21, 2013-O22, 2013-O23, 2013-O24 & 2013-O26 -- 2013 OV2, 2013 OO2, 2013 ON2, 2013 OM2, 2013 OG, 2013 OF, 2013 NX23, 2013 NP11, 2013 MY6, 2013 ML3, 2013 KJ6, 2013 FY13, 86666, 365071, 359592, 162483, 139345
I74Baxter Garden Obs. in England, 1 in MPEC 2013-O19 -- 2013 OG
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 21 in MPECs 2013-O19, 2013-O21 & 2013-O22 -- 2013 OM2, 2013 OH, 2013 OF, 2013 NX23, 2013 NQ8, 2013 NP8, 2013 NJ15, 2013 NE19, 2013 ND15, 2013 NC15, 2013 NA15, 2013 MZ5, 2013 MY5, 2013 GJ35, 2013 BQ45, 2012 VJ82, 2011 BT15, 2009 WR6, 87309, 152637, 139345
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2013-O21 -- 2013 NX23
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-O26 -- 2013 OV2
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-O21 -- 2013 NX23
J95Great Shefford Obs. in England, 5 in MPECs 2013-O21, 2013-O23, 2013-O24, 2013-O26 & 2013-O27 -- 2013 OW2, 2013 OV2, 2013 OO2, 2013 ON2, 2013 NX23
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-O26 -- 2013 OV2
W87LCOGT Cerro Tololo C in Chile, 2 in MPECs 2013-O24 & 2013-O27 -- 2013 OW2, 2013 OO2
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-O22 -- 2013 OM2
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2013-O19, 2013-O20 & 2013-O25 -- 2011 WO4, 2009 WM1, 2003 KZ18
G34Oberfrauendorf Obs., 2 in MPEC 2013-O19 -- 243147, 9950
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2013-O19, 2013-O22, 2013-O23, 2013-O24, 2013-O26 & 2013-O27 -- 2013 OW2, 2013 OV2, 2013 OO2, 2013 ON2, 2013 OM2, 2013 GT38, 2004 TB18, 2002 FD, 86666, 285990, 189173, 3752
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2013-O19 -- 2013 OG, 2013 MX5, 2010 TN54, 2006 NL
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-O21 -- 2013 NX23
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-O26 -- 2013 OV2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 OHNEODyS1426R E M O V E D-
JPL Sentry1426R E M O V E DJPL: Risk listing removed at 0951 UTC.
2013 ML3JPL Sentry1426210939.1e-08-6.11-6.240JPL: "Analysis based on 179 observations spanning 29.020 days (2013-Jun-19.27039 to 2013-Jul-18.290785)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS1426R 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 19 July '13

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

2317Grabbed MPEC 2013-O26 - 2013 OV2 - see above
Grabbed MPEC 2013-O27 - 2013 OW2 - see above
1431Generated Traffic Report
1426Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has removed 2013 ML3 as an impact risk - see above
Noted that JPL Sentry has removed 2013 OH as an impact risk - see above
Noted that NEODyS has removed 2013 OH as an impact risk - see above
Grabbed MPEC 2013-O19 - Daily Orbit Update - see above
Grabbed MPEC 2013-O20 - 2011 WO4 - see above
Grabbed MPEC 2013-O21 - 2013 NX23 - see above
Grabbed MPEC 2013-O22 - 2013 OM2 - see above
Grabbed MPEC 2013-O23 - 2013 ON2 - see above
Grabbed MPEC 2013-O24 - 2013 OO2 - see above
Grabbed MPEC 2013-O25 - 2003 KZ18 - see above