Contents  on 16 August '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 August '13

One object reported inside ten LD

One object is reported to be within ten lunar distances (LD) of our home world today. Newly announced 2013 PR43 is outbound from 8.31 to 9.77 LD after passing Earth at 2.64 LD on August 10th. No other objects are known to be coming in until mid-November.

This report was updated at 2137 UTC with new discovery 2013 PR43 (MPEC). Today's first traffic report was generated at 1522 UTC with follow-up in today's DOU MPEC for three recently departed objects: risk-listed 2013 PS13, intruder 2013 PJ10, and radar target 277475 2005 WK4.

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 August '13

The MPC's NEO Confirmation Page has 58 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 58 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 74 listings on the NEOCP today.

New MPECs  on 16 August '13

Minor Planet Electronic Circulars

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

MPEC 2013-Q06 - "21:26 UT" - 2009 WH106

MPEC 2013-Q05 - "18:56 UT" - 2013 PR43

MPEC 2013-Q04 - "18:50 UT" - 2013 PO43

MPEC 2013-Q03 - "18:45 UT" - 2013 PN43

MPEC 2013-Q02 - "18:20 UT" - Comet C/2013 P3 (Palomar)

<< DOU on 16 Aug. '13 >>  MPEC 2013-Q01 - "06:04 UT" - Daily Orbit Update

Observers  on 16 August '13

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2013-Q01, 2013-Q02, 2013-Q03 & 2013-Q04 -- 2013 PW6, 2013 PO43, 2013 PN43, 2013 PJ10, C/2013 P3, 2013 OG, 2013 OE, 2013 NP11, 2013 NK, 2013 NJ15, 2010 LG14, 140039, 11405
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-Q02 -- C/2013 P3
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-Q02 -- C/2013 P3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2013-Q01, 2013-Q04 & 2013-Q05 -- 2013 PR43, 2013 PO43, 2013 LF1, 2013 LE16, 2013 ES89, 2013 CN222, 2011 PT1, 2008 DK5, 2002 VR94
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-Q05 -- 2013 PR43
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-Q05 -- 2013 PR43
Z81Estrella de Mar Obs., 1 in MPEC 2013-Q01 -- 85804
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2013-Q02, 2013-Q03, 2013-Q04 & 2013-Q06 -- 2013 PO43, 2013 PN43, C/2013 P3, 2009 WH106
203GiaGa Obs. in Italy, 5 in MPECs 2013-Q01, 2013-Q02 & 2013-Q03 -- 2013 PN43, C/2013 P3, 2010 NZ1, 2010 LG14, 294739
J95Great Shefford Obs. in England, 1 in MPEC 2013-Q06 -- 2009 WH106
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-Q04 -- 2013 PO43
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2013-Q01 -- 2013 PC39
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-Q02 -- C/2013 P3
J75La Sagra Obs. in Spain, 1 in MPEC 2013-Q01 -- 2013 PS13
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-Q01 -- 2010 NZ1
900Moriyama Obs. in Japan, 2 in MPECs 2013-Q02 & 2013-Q05 -- 2013 PR43, C/2013 P3
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 8 in MPEC 2013-Q01 -- 2010 TN54, 361071, 277475, 153349, 140039, 11405, 6037, 1627
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-Q01 -- 275677
I41Palomar Transient Factory (PTF) in southern California, 2 in MPECs 2013-Q01 & 2013-Q02 -- C/2013 P3, 2000 RN77
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2013-Q01, 2013-Q03, 2013-Q04, 2013-Q05 & 2013-Q06 -- 2013 PU13, 2013 PR43, 2013 PO43, 2013 PN43, 2013 PE26, 2013 PB39, 2013 PA39, 2013 OO5, 2013 NK, 2009 WH106, 2006 QA58, 2005 EJ94, 90416, 304153
A32Panker Obs. in Germany, 2 in MPEC 2013-Q01 -- 285263, 11405
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2013-Q01 -- 2013 OM9, 2013 BO76, 2009 WE253
C95SATINO-1 in France, 2 in MPECs 2013-Q01 & 2013-Q02 -- C/2013 P3, 2013 OH
Y00SONEAR Obs. in Brazil, 1 in MPEC 2013-Q02 -- C/2013 P3
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-Q02 -- C/2013 P3
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-Q02 -- C/2013 P3
G401program code 1 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-Q01 -- 52762
K90Sopot Obs., 2 in MPEC 2013-Q01 -- 2013 BO76, 1627
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-Q02 & 2013-Q04 -- 2013 PO43, C/2013 P3
C44Volta Obs. in Italy, 1 in MPEC 2013-Q02 -- C/2013 P3
I891program code 1 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-Q02 -- C/2013 P3
I896program code 6 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-Q02 -- C/2013 P3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 August '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 PD39NEODyS15182066-209433.07e-07-6.31-6.320NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2013-08-12.460 to 2013-08-14.346."
JPL Sentry02172066-208924.3e-07-6.16-6.160JPL: "Analysis based on 8 observations spanning 1.8856 days (2013-Aug-12.45913 to 2013-Aug-14.344751)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
2013 PS13JPL Sentry15182096-210935.1e-06-6.46-6.470JPL: "Analysis based on 75 observations spanning 1.2298 days (2013-Aug-07.9199 to 2013-Aug-09.149675)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS15182096-210939.22e-07-7.20-7.280NEODyS: "Based on 88 optical observations (of which 17 are rejected as outliers) from 2013-08-07.921 to 2013-08-09.150."

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 August '13

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

2214Grabbed MPEC 2013-Q06 - 2009 WH106 - see above
2137Updated Traffic Report
2002Grabbed MPEC 2013-Q03 - 2013 PN43 - see above
Grabbed MPEC 2013-Q04 - 2013 PO43 - see above
Grabbed MPEC 2013-Q05 - 2013 PR43 - see above
1835Grabbed MPEC 2013-Q02 - Comet C/2013 P3 (Palomar) - see above
1518Noted that NEODyS has posted 2013 PD39 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 PS13 risk assessment - see above
Noted that NEODyS has updated its 2013 PS13 risk assessment - see above
Grabbed MPEC 2013-Q01 - Daily Orbit Update - see above
0217Noted that JPL Sentry has posted 2013 PD39 as an impact risk - see above