Contents  on 10 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 10 September '12

No objects reported inside ten LD

No asteroids are reported to be inside ten lunar distances (LD) of Earth today, but radar target 2012 QG42 arrives inside ten LD tomorrow.

This report was generated at 1645 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.

Radar Astrometry  on 10 September '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1931 UTC when the database was dated 10 Sept.

NEOCP Activity  on 10 September '12

The MPC's NEO Confirmation Page has 5 listings

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

New MPECs  on 10 September '12

Minor Planet Electronic Circulars

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


MPEC 2012-R21 - "19:22 UT" - 2012 RB3


MPEC 2012-R20 - "15:51 UT" - 2008 QU3


MPEC 2012-R19 - "15:26 UT" - 2012 RM2


MPEC 2012-R18 - "15:24 UT" - 2012 RL2


<< DOU on 10 Sept. '12 >>  MPEC 2012-R17 - "06:02 UT" - Daily Orbit Update

Observers  on 10 September '12

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-R17 -- 2012 QG42
251Arecibo in Puerto Rico, 1 in radar -- 2012 PX
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-R17, 2012-R19 & 2012-R21 -- 2012 RM2, 2012 RB3, 2012 QY14, 2012 QG49, 2012 QE50
A74Bergen-Enkheim Obs. in Germany, 3 in MPECs 2012-R17 & 2012-R19 -- 2012 RM2, 2012 QJ2, 2012 QE50
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2012-R17 -- 2012 BT23
235CAST Obs. in Italy, 2 in MPECs 2012-R17 & 2012-R19 -- 2012 RM2, 2012 QG42
160Castelmartini Obs. in Italy, 12 in MPEC 2012-R17 -- 2012 QY14, 2012 QX17, 2012 QP17, 2012 QO10, 2012 QG42, 2012 QB17, 2012 PS17, 2012 PP24, 1994 EK, 335746, 329340, 276397
470Ceccano Obs. in Italy, 1 in MPEC 2012-R19 -- 2012 RM2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2012-R17, 2012-R18 & 2012-R21 -- 2012 RL2, 2012 RB3, 2012 QH49, 2012 QF49
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-R19 -- 2012 RM2
B50Corner Obs. in Germany, 1 in MPEC 2012-R17 -- 2012 QG42
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-R19 -- 2012 RM2
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-R18 -- 2012 RL2
J95Great Shefford Obs. in England, 1 in MPEC 2012-R19 -- 2012 RM2
246KLENOT in the Czech Republic, 3 in MPECs 2012-R17 & 2012-R19 -- 2012 RM2, 2012 QX17, 2012 QG42
168Kourovskaya Obs. in Russia, 6 in MPEC 2012-R17 -- 330825, 144411, 105140, 5143, 4487, 1685
A14Les Engarouines Obs. in France, 1 in MPEC 2012-R17 -- 5646
844Los Molinos Obs. in Uruguay, 2 in MPEC 2012-R17 -- 2012 FM52, 3752
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-R17 -- 2012 QG42
C91Montevenere Obs., 1 in MPEC 2012-R17 -- 2012 QG42
A24New Millennium Obs. in Italy, 1 in MPEC 2012-R19 -- 2012 RM2
C47Nonndorf Obs. in Austria, 2 in MPEC 2012-R17 -- 2012 QG42, 2012 QE50
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-R19 -- 2012 RM2
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-R17 -- 2007 DB83, 52381, 329437, 276397, 189630, 5011
H23Pear Tree Obs. in Florida, 1 in MPEC 2012-R17 -- 2012 QG42
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-R17 -- 2012 QP17, 2012 QJ2, 2012 QG42, 2012 QF42, 2012 QE50, 2012 QB17, 2012 PS17, 2012 PG5, 2012 BZ76, 2007 RT19, 2006 DY, 2000 RH60
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-R19 -- 2012 RM2
H36Sandlot Obs. in Kansas, 7 in MPECs 2012-R17, 2012-R19, 2012-R20 & 2012-R21 -- 2012 RM2, 2012 RB3, 2012 QR50, 2012 QQ10, 2012 HO15, 2008 QU3, 1999 TZ4
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2012-R17, 2012-R18 & 2012-R21 -- 2012 RL2, 2012 RB3, 2001 QG142
510Siegen Obs. in Germany, 1 in MPEC 2012-R19 -- 2012 RM2
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-R19 -- 2012 RM2
C36Starry Wanderer Obs. in Belarus, 2 in MPEC 2012-R17 -- 2012 QG42, 2012 QE50
B18Terskol Obs. in Russia, 1 in MPEC 2012-R17 -- 4179
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2012-R17 -- 2012 QG42
718Wiggins Obs. in Utah, 2 in MPEC 2012-R17 -- 2012 QG42, 2012 QE50
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 September '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2359 and NEODyS at 2325 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 PXJPL Sentry2110R E M O V E DJPL: Risk listing removed at 2051 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 September '12

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

2110Noted that JPL Sentry has removed 2012 PX as an impact risk - see above
1931Grabbed MPEC 2012-R21 - 2012 RB3 - see above
Noted Radar Astrometry database update - see above
1645Generated Traffic Report
1643Grabbed MPEC 2012-R17 - Daily Orbit Update - see above
Grabbed MPEC 2012-R18 - 2012 RL2 - see above
Grabbed MPEC 2012-R19 - 2012 RM2 - see above
Grabbed MPEC 2012-R20 - 2008 QU3 - see above