Contents  on 10 August '13

Asteroid/Comet Connection (A/CC) Resources:

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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 '13

Three objects reported inside ten LD

Three asteroids are reported to be within ten lunar distances (LD) of our planet today. Risk-listed intruder 2013 PS13 exits Earth's Hill sphere, traveling from 3.07 to 6.94 LD. More distantly, radar target 277475 2005 WK4 is outbound from 8.20 to 8.74 LD and intruder 2013 PJ10 exits ten LD, passing from 9.12 to 10.65 LD.

This report was generated at 1426 UTC with follow-up in today's DOU MPEC for 277475 2005 WK4.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 '13

The MPC's NEO Confirmation Page has 40 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 40 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 47 listings on the NEOCP today.

New MPECs  on 10 August '13

Minor Planet Electronic Circulars

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


MPEC 2013-P55 - "20:54 UT" - 2013 PS20


<< DOU on 10 Aug. '13 >>  MPEC 2013-P54 - "06:03 UT" - Daily Orbit Update

Observers  on 10 August '13

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2013-P54 -- 2013 OO5, 2013 OO2, 2013 OH, 2013 OG, 2013 NX23, 2013 NP11, 2013 NL10, 2013 NH10, 2013 MX5, 11405
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2013-P54 -- 2013 OM9, 2010 TN54, 52762, 280136
448Desert Moon Obs. in New Mexico, 7 in MPEC 2013-P54 -- 2013 PX6, 2013 PV6, 2013 OO5, 2013 OH, 2013 NH10, 357022, 155341
151Eschenberg Obs. in Switzerland, 2 in MPEC 2013-P54 -- 2013 PX6, 2013 BO76
Z81Estrella de Mar Obs., 1 in MPEC 2013-P54 -- 2013 NX23
203GiaGa Obs. in Italy, 2 in MPEC 2013-P54 -- 294739, 271480
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-P54 -- 2013 PW14
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-P54 -- 2013 PZ6, 2013 PX6
474Mt. John Obs. in New Zealand, 6 in MPEC 2013-P54 -- 2013 PH3, 2013 PH10, 2013 PA7, 2013 OD4, 2013 NA15, 2009 SQ172
C23Olmen Obs. in Belgium, 2 in MPEC 2013-P54 -- 285263, 153349
C27Pallerols Obs. in Spain, 7 in MPEC 2013-P54 -- 85804, 52762, 361071, 329437, 24445, 9950, 4581
I41Palomar Transient Factory (PTF) in southern California, 4 in MPEC 2013-P54 -- 2013 PV13, 2012 XR134, 2006 QA58, 276786
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2013-P54 & 2013-P55 -- 2013 PS20, 162195, 154268, 3352
A32Panker Obs. in Germany, 2 in MPEC 2013-P54 -- 66008, 285263
Y00SONEAR Obs. in Brazil, 64 in MPEC 2013-P54 -- 2013 OH, 2013 NX23, 2013 NX, 2013 NK4, 2013 KR1, 2013 AU76, 2011 NP, 2011 DL19, 2010 UX95, 2010 TN54, 2010 AF30, 2009 WE253, 2007 XY9, 2003 OB4, 96189, 86829, 86039, 85804, 54789, 52762, 52760, 39565, 361123, 361071, 360433, 355256, 354952, 347813, 303262, 294739, 285263, 280136, 274855, 250614, 24445, 243147, 242450, 242216, 232691, 215188, 20826, 192563, 189865, 17188, 17182, 168378, 163364, 159609, 153349, 140039, 137802, 137199, 8013, 7888, 7753, 6037, 4957, 4953, 4769, 4486, 3691, 2063, 1685, 1627
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-P54 -- 4450
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2013-P54 & 2013-P55 -- 2013 PY6, 2013 PS20, 2013 PH10, 2013 OU3, 2013 OH, 2013 NV, 2013 NP11, 2013 NE15, 2013 LL31, 2010 NY65
A48Verona Obs. in Italy, 1 in MPEC 2013-P54 -- 2013 BO76
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-P54 -- 277475
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2013 PV13JPL Sentry1425209314.7e-07-4.37-4.370JPL: "Analysis based on 33 observations spanning 1.3644 days (2013-Aug-06.98874 to 2013-Aug-08.35311)." Diameter approximately 0.250 km. from mean, weighted H=20.6.

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 '13

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

2103Grabbed MPEC 2013-P55 - 2013 PS20 - see above
1426Generated Traffic Report
1425Noted that JPL Sentry has updated its 2013 PV13 risk assessment - see above
Grabbed MPEC 2013-P54 - Daily Orbit Update - see above