Contents  on 11 September '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 11 September '12

One object reported inside ten LD

One visitor is reported passing within ten lunar distances (LD) of our planet today. Radar target 2012 QG42 comes inside ten LD, traveling from 10.92 to 9.25 LD. Headed our way next, 2010 JK1 arrives inside ten LD on November 22nd.

This report was generated at 1626 UTC with follow-up in today's DOU MPEC for 2012 QG42.


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 11 September '12

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of eight 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 11 September '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-R25 - "16:47 UT" - 2012 RH3


MPEC 2012-R24 - "16:44 UT" - 2012 RG3


<< DOU on 11 Sept. '12 >>  MPEC 2012-R23 - "06:02 UT" - Daily Orbit Update


MPEC 2012-R22 - "00:42 UT" - S/2000 J 11

Observers  on 11 September '12

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2012-R25 -- 2012 RH3
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPECs 2012-R23, 2012-R24 & 2012-R25 -- 2012 RO1, 2012 RH3, 2012 RG3, 2012 QX17, 2012 QQ10, 2012 QJ2, 2012 QG8, 2012 QG49, 2012 QG42, 2012 QF49, 2012 QF42, 2012 QE50, 2012 QC18, 2012 PX, 2012 PP24, 2012 PO17, 2012 PJ6, 2012 PC20, 2012 OB1, 2012 HN8, 2012 FJ, 2003 SJ84
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-R23 -- 2012 QJ2
B75Betelgeuse Station in Italy, 2 in MPEC 2012-R23 -- 2012 QG42, 2012 QE50
160Castelmartini Obs. in Italy, 10 in MPEC 2012-R23 -- 2012 QE50, 2012 LE11, 2012 HO15, 2005 UC, 1998 QC1, 334412, 333889, 330825, 329520, 214869
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-R25 -- 2012 RH3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-R25 -- 2012 RH3
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-R24 -- 2012 RG3
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-R23 -- 2012 QC8
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-R23 -- 2012 QC8
J95Great Shefford Obs. in England, 1 in MPEC 2012-R25 -- 2012 RH3
J81Guirguillano Obs. in Spain, 1 in MPEC 2012-R23 -- 2012 QG42
246KLENOT in the Czech Republic, 1 in MPEC 2012-R25 -- 2012 RH3
J38La Vara Obs. in Spain, 1 in MPEC 2012-R23 -- 2012 QG42
711McDonald Obs. in Texas, 1 in MPEC 2012-R25 -- 2012 RH3
118Modra Obs. in Slovakia, 1 in MPEC 2012-R25 -- 2012 RH3
C91Montevenere Obs., 1 in MPEC 2012-R23 -- 2012 QG42
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-R23 -- 2000 FL1
C47Nonndorf Obs. in Austria, 3 in MPEC 2012-R23 -- 2012 QG42, 2012 QE50, 2012 QB17
C23Olmen Obs. in Belgium, 1 in MPEC 2012-R23 -- 2012 QG42
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2012-R23 & 2012-R24 -- 2012 RG3, 2010 OS22
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-R25 -- 2012 RH3
204Schiaparelli Obs. in Italy, 9 in MPECs 2012-R23 & 2012-R25 -- 2012 RH3, 2012 QE50, 2012 QC18, 2012 PK24, 2012 LU7, 2006 DY, 2001 QM142, 2000 SD8, 1999 TX2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-R23 -- 2012 RB3
510Siegen Obs. in Germany, 2 in MPEC 2012-R23 -- 2012 QG42, 2012 QE50
C36Starry Wanderer Obs. in Belarus, 3 in MPEC 2012-R23 -- 2012 QE50, 329520, 3838
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-R23 -- 2012 QE50
A92Urseanu Obs. in Romania, 1 in MPEC 2012-R23 -- 2012 QG42
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2012-R23 -- 2012 LE11
718Wiggins Obs. in Utah, 1 in MPEC 2012-R23 -- 2012 QG42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 September '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.
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
2012 PK24JPL Sentry16252045-2094103.8e-05-3.64-3.650JPL: "Analysis based on 51 observations spanning 26.561 days (2012-Aug-13.41356 to 2012-Sep-08.97432)." Diameter approximately 0.065 km. from mean, weighted H=23.6.
NEODyS16252038-2094151.49e-05-4.05-4.070NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-09-08.975."
2008 EM68JPL Sentry03162012-21105674.8e-06-5.65-6.280JPL: "Analysis based on 11 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183)." Diameter approximately 0.010 km. from mean, weighted H=27.5.

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 11 September '12

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

1906Grabbed MPEC 2012-R24 - 2012 RG3 - see above
Grabbed MPEC 2012-R25 - 2012 RH3 - see above
1626Generated Traffic Report
1625Noted that JPL Sentry has updated its 2012 PK24 risk assessment - see above
Noted that NEODyS has updated its 2012 PK24 risk assessment - see above
Grabbed MPEC 2012-R23 - Daily Orbit Update - see above
0316Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
0057Grabbed MPEC 2012-R22 - S/2000 J 11 - see above