Contents  on 16 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 16 July '13

No objects reported inside ten LD

No objects are reported moving within ten lunar distances (LD) of Earth 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).

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 16 July '13

The MPC's NEO Confirmation Page has 36 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 36 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 52 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 16 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-O09 - "19:55 UT" - 2010 OQ1

<< DOU on 16 July '13 >>  MPEC 2013-O08 - "06:03 UT" - Daily Orbit Update

MPEC 2013-O07 - "02:37 UT" - 2013 NJ15

MPEC 2013-O06 - "02:33 UT" - 2013 NF15

MPEC 2013-O05 - "02:30 UT" - 2013 NE15

MPEC 2013-O04 - "02:26 UT" - 2013 ND15

MPEC 2013-O03 - "02:22 UT" - 2013 NC15

MPEC 2013-O02 - "02:18 UT" - 2013 NB15

MPEC 2013-O01 - "02:14 UT" - 2013 NA15

Observers  on 16 July '13

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPECs 2013-O01, 2013-O08 & 2013-O09 -- 2013 NV, 2013 NT11, 2013 NG6, 2013 NA15, 2013 MY6, 2013 MR6, 2013 MR, 2013 MP11, 2013 ML3, 2013 LV28, 2013 LL31, 2013 KJ6, 2013 BC18, 2010 OQ1, 2010 NY65, 2006 NL, 2006 EE1, 354952, 350964, 189973, 3752
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2013-O03, 2013-O08 & 2013-O09 -- 2013 NV6, 2013 NQ8, 2013 NP8, 2013 NH6, 2013 NC15, 2013 MY5, 2013 MD6, 2013 EV89, 2011 WU95, 2010 OQ1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-O08 -- 2006 NL
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-O09 -- 2010 OQ1
J95Great Shefford Obs. in England, 1 in MPEC 2013-O01 -- 2013 NA15
W85LCOGT Cerro Tololo A in Chile, 5 in MPECs 2013-O01, 2013-O03, 2013-O04, 2013-O06 & 2013-O07 -- 2013 NJ15, 2013 NF15, 2013 ND15, 2013 NC15, 2013 NA15
C41MASTER-II Obs. Kislovodsk in Russia, 3 in MPEC 2013-O08 -- 85804, 363790, 21088
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-O08 -- 2013 NU
568_Marco Micheli on Mauna Kea in Hawaii, 5 in MPECs 2013-O02, 2013-O03, 2013-O04, 2013-O05 & 2013-O06 -- 2013 NF15, 2013 NE15, 2013 ND15, 2013 NC15, 2013 NB15
C91Montevenere Obs., 1 in MPEC 2013-O08 -- 285263
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-O01 -- 2013 NA15
C23Olmen Obs. in Belgium, 2 in MPEC 2013-O08 -- 2007 XY9, 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-O01, 2013-O02, 2013-O03, 2013-O04, 2013-O05, 2013-O06, 2013-O07 & 2013-O08 -- 2013 NJ15, 2013 NF15, 2013 NE15, 2013 ND15, 2013 NC15, 2013 NB15, 2013 NA15, 2013 LV28, 2013 EW128, 200840, 3752
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-O08 -- 2007 XY9
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-O01 -- 2013 NA15
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-O08 -- 2006 NL
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-O09 -- 2010 OQ1
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2013-O01 & 2013-O07 -- 2013 NJ15, 2013 NA15
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 NE15JPL Sentry2206201414.6e-10-6.28-6.280JPL: "Analysis based on 9 observations spanning .99469 days (2013-Jul-14.48921 to 2013-Jul-15.483896)." Diameter approximately 0.095 km. from mean, weighted H=22.8.
NEODyS18002014-206931.62e-09-5.66-5.660NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2013-07-14.490 to 2013-07-15.485."
2013 NH6JPL Sentry1534206012.6e-06-4.47-4.470JPL: "Analysis based on 36 observations spanning 11.451 days (2013-Jul-03.642839 to 2013-Jul-15.09381)." Diameter approximately 0.073 km. from mean, weighted H=23.3.
2013 ML3JPL Sentry1534210942.4e-07-5.69-5.900JPL: "Analysis based on 168 observations spanning 25.690 days (2013-Jun-19.27039 to 2013-Jul-14.9607)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS15342109-210922.67e-07-5.65-5.80NEODyS: "Based on 170 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-14.961."

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 16 July '13

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

2206Noted that JPL Sentry has posted 2013 NE15 as an impact risk - see above
2032Grabbed MPEC 2013-O09 - 2010 OQ1 - see above
1800Noted that NEODyS has posted 2013 NE15 as an impact risk - see above
1548Generated Traffic Report
1534Noted 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
Grabbed MPEC 2013-O08 - Daily Orbit Update - see above
0409Grabbed MPEC 2013-O01 - 2013 NA15 - see above
Grabbed MPEC 2013-O02 - 2013 NB15 - see above
Grabbed MPEC 2013-O03 - 2013 NC15 - see above
Grabbed MPEC 2013-O04 - 2013 ND15 - see above
Grabbed MPEC 2013-O05 - 2013 NE15 - see above
Grabbed MPEC 2013-O06 - 2013 NF15 - see above
Grabbed MPEC 2013-O07 - 2013 NJ15 - see above