Contents  on 10 August '12

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 10 August '12

No objects reported inside ten LD

There are no asteroids reported flying inside ten lunar distances (LD) of out planet today and none are known to be coming in until November. This report was generated at 0059 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 10 August '12

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 20 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 10 August '12

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 2012-P22 - "16:41 UT" - 2012 PS4

<< DOU on 10 Aug. '12 >>  MPEC 2012-P21 - "06:02 UT" - Daily Orbit Update

MPEC 2012-P20 - "00:39 UT" - 2012 PX

MPEC 2012-P19 - "00:37 UT" - 2012 PW

Observers  on 10 August '12

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-P22 -- 2012 PS4
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-P21 -- 2012 LU7
160Castelmartini Obs. in Italy, 14 in MPEC 2012-P21 -- 2012 PA, 2012 OP4, 2012 OO, 2012 OD1, 2012 NP, 2012 LU7, 2012 HG31, 2009 AV, 37655, 330825, 329437, 326732, 317685, 217013
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2012-P21 & 2012-P22 -- 2012 PS4, 2012 KM45
821Cordoba Obs. Bosque Alegre Station in Argentina, 1 in MPEC 2012-P22 -- 2012 PS4
J95Great Shefford Obs. in England, 4 in MPECs 2012-P19, 2012-P20 & 2012-P21 -- 2012 PX, 2012 PW, 2012 PN, 2012 OP4
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-P21 -- 11054
704LINEAR in New Mexico, 5 in MPEC 2012-P21 -- 52387, 331963, 162980, 112221, 9202
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2012-P19 & 2012-P20 -- 2012 PX, 2012 PW
118Modra Obs. in Slovakia, 1 in MPEC 2012-P21 -- 2012 PW
J93Mt. Tuffley Obs. in England, 2 in MPEC 2012-P21 -- 4179, 1685
A13Naef Obs. in Switzerland, 1 in MPEC 2012-P21 -- 87311
A24New Millennium Obs. in Italy, 1 in MPEC 2012-P19 -- 2012 PW
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2012-P19, 2012-P20 & 2012-P21 -- 2012 PX, 2012 PW, 138847, 5646
J53Posadas Obs. in Spain, 2 in MPEC 2012-P21 -- 2012 LU7, 217013
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-P22 -- 2012 PS4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-P19 -- 2012 PW
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-P20 & 2012-P22 -- 2012 PX, 2012 PS4
B38Santa Mama Obs. in Italy, 2 in MPEC 2012-P21 -- 2012 HG31, 5587
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2012-P21 & 2012-P22 -- 2012 PS4, 433
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2012-P21 -- 2012 PX, 2012 PN, 2012 JS11
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-P19 -- 2012 PW
954Teide Obs. in the Canary Islands, 2 in MPECs 2012-P19 & 2012-P22 -- 2012 PW, 2012 PS4
B42Vitebsk Obs. in Belarus, 1 in MPEC 2012-P19 -- 2012 PW
198Wildberg Obs. in Germany, 1 in MPEC 2012-P19 -- 2012 PW
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 August '12

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
2012 PXJPL Sentry16032022-21111102.2e-05-3.87-4.480JPL #2 for the day: "Analysis based on 16 observations spanning 2.8521 days (2012-Aug-07.35157 to 2012-Aug-10.20366)." Diameter approximately 0.078 km. from mean, weighted H=23.2.
NEODyS16032028-2100542.2e-05-3.88-4.520NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2012-08-07.352 to 2012-08-10.204."
2012 PNJPL Sentry1603R E M O V E DJPL: Risk listing removed at 0849 UTC.

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 10 August '12

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

1703Grabbed MPEC 2012-P22 - 2012 PS4 - see above
1603Noted that JPL Sentry has removed 2012 PN as an impact risk - see above
Noted that JPL Sentry has updated its 2012 PX risk assessment - see above
Noted that NEODyS has posted 2012 PX as an impact risk - see above
Grabbed MPEC 2012-P21 - Daily Orbit Update - see above
0346Noted that JPL Sentry has posted 2012 PX as an impact risk - see above
0059Generated Traffic Report
0056Grabbed MPEC 2012-P19 - 2012 PW - see above
Grabbed MPEC 2012-P20 - 2012 PX - see above