Contents  on 14 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 14 August '13

No objects reported inside ten LD

No asteroids are reported passing inside ten lunar distances (LD) of our planet today, and none are known to be coming in until mid-November.

This report was generated at 1459 UTC with follow-up in today's DOU MPEC for departed objects risk-listed 2013 PG10 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 14 August '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, twelve were "one nighters." So far The Tracking News has counted a total of 48 listings on the NEOCP today.

New MPECs  on 14 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-P77 - "20:38 UT" - 2013 PC39

MPEC 2013-P76 - "20:29 UT" - 2013 PB39

MPEC 2013-P75 - "20:21 UT" - 2013 PA39

MPEC 2013-P74 - "20:17 UT" - 2013 PZ38

MPEC 2013-P73 - "20:12 UT" - 2013 PY38

<< DOU on 14 Aug. '13 >>  MPEC 2013-P72 - "06:03 UT" - Daily Orbit Update

Observers  on 14 August '13

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-P72 -- 2013 PC7
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-P75 -- 2013 PA39
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-P72 -- 2013 PW6
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-P74 -- 2013 PZ38
Z81Estrella de Mar Obs., 2 in MPEC 2013-P72 -- 2000 RN77, 247517
J95Great Shefford Obs. in England, 4 in MPECs 2013-P73, 2013-P74, 2013-P75 & 2013-P76 -- 2013 PZ38, 2013 PY38, 2013 PB39, 2013 PA39
D00ISON-Kislovodsk Obs., 1 in MPEC 2013-P72 -- 3691
5682David Tholen's team on Mauna Kea in Hawaii, 6 in MPEC 2013-P72 -- 2013 PZ6, 2013 PG10, 2013 NF19, 2013 LD1, 2013 KH6, 2013 GS38
C23Olmen Obs. in Belgium, 1 in MPEC 2013-P72 -- 285263
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-P72 -- 361071, 276786
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2013-P72, 2013-P73, 2013-P74, 2013-P75, 2013-P76 & 2013-P77 -- 2013 PZ38, 2013 PY38, 2013 PW31, 2013 PC39, 2013 PB39, 2013 PA39, 2013 OP3, 2013 OE
C63Piazzi Obs., 5 in MPEC 2013-P72 -- 2013 OM9, 2010 UX95, 2003 OB4, 247517, 105140
C95SATINO-1 in France, 1 in MPEC 2013-P72 -- 277475
Y00SONEAR Obs. in Brazil, 13 in MPEC 2013-P72 -- 2013 PX6, 2013 PV6, 2013 PV13, 2013 PU13, 2013 PC7, 85804, 52760, 277475, 242450, 159609, 153349, 140039, 11405
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2013-P73, 2013-P74, 2013-P75 & 2013-P76 -- 2013 PZ38, 2013 PY38, 2013 PB39, 2013 PA39
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-P75 & 2013-P77 -- 2013 PC39, 2013 PA39
B38Santa Mama Obs. in Italy, 4 in MPEC 2013-P72 -- 2010 LG14, 365071, 137170, 11405
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-P77 -- 2013 PC39
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-P72 -- 359369, 16834
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2013-P72, 2013-P73 & 2013-P77 -- 2013 PY38, 2013 PC39, 2013 OW2, 2013 OP3, 2013 OE
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-P74 & 2013-P76 -- 2013 PZ38, 2013 PB39
A84TUBITAK Natl. Obs. (TUG) in Turkey, 4 in MPEC 2013-P72 -- 2004 DK1, 85640, 66063, 4179
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-P76 -- 2013 PB39
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 PW31JPL Sentry1459R E M O V E DJPL: Risk listing removed at 1323 UTC.
2013 PG10JPL Sentry14592056-210255.0e-06-6.78-6.880JPL: "Analysis based on 23 observations spanning 8.9955 days (2013-Aug-02.39329 to 2013-Aug-11.388753)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS14592045-2111184.25e-06-6.84-6.910NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2013-08-02.394 to 2013-08-11.390."
2010 UC7JPL Sentry0426211241.2e-08-8.05-8.280JPL: "Analysis based on 44 observations spanning 6.0649 days (2010-Oct-28.43616 to 2010-Nov-03.50105)." Diameter approximately 0.038 km. from mean, weighted H=24.7.

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 14 August '13

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

2100Grabbed MPEC 2013-P75 - 2013 PA39 - see above
Grabbed MPEC 2013-P76 - 2013 PB39 - see above
Grabbed MPEC 2013-P77 - 2013 PC39 - see above
2020Grabbed MPEC 2013-P73 - 2013 PY38 - see above
Grabbed MPEC 2013-P74 - 2013 PZ38 - see above
1459Noted that JPL Sentry has updated its 2013 PG10 risk assessment - see above
Noted that NEODyS has updated its 2013 PG10 risk assessment - see above
Noted that JPL Sentry has removed 2013 PW31 as an impact risk - see above
Grabbed MPEC 2013-P72 - Daily Orbit Update - see above
Generated Traffic Report
0426Noted that JPL Sentry has reposted 2010 UC7 as an impact risk - see above