Contents  on 8 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 8 September '12

No objects reported inside ten LD

There are no objects reported within ten lunar distances (LD) of our planet today. Next up, radar target 2012 QG42 arrives inside ten LD on September 11th and 2010 JK1 on November 22nd.

This report was generated at 1620 UTC with the recovery of 2009 BW2 (MPEC) and today's DOU MPEC with observation of 2012 QG42 and the recovery of 2012 QB18.


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 8 September '12

The MPC's NEO Confirmation Page has 20 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 22 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 8 September '12

Minor Planet Electronic Circulars

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


MPEC 2012-R14 - "18:39 UT" - 2012 RO1


MPEC 2012-R13 - "15:29 UT" - 2009 BW2


<< DOU on 8 Sept. '12 >>  MPEC 2012-R12 - "06:02 UT" - Daily Orbit Update

Observers  on 8 September '12

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2012-R12 & 2012-R14 -- 2012 RO1, 2012 QX17, 2012 QJ2, 2012 QG49, 2012 QG42, 2012 QF42, 2012 QE50, 2012 QC18, 2012 QB18, 2012 QB17, 2012 PP24, 2012 PJ6, 2012 PG5, 2012 OA1
I74Baxter Garden Obs., 1 in MPEC 2012-R12 -- 2012 QB17
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-R12 -- 2006 CV
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-R12 -- 2012 QE50
235CAST Obs. in Italy, 1 in MPEC 2012-R12 -- 2012 QG42
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-R12 -- 331792
I63Cygnus Obs., 1 in MPEC 2012-R12 -- 2012 QG42
I57Elche Obs., 1 in MPEC 2012-R12 -- 2012 QG42
J95Great Shefford Obs. in England, 2 in MPECs 2012-R12 & 2012-R14 -- 2012 RO1, 2012 PP28
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-R13 -- 2009 BW2
711McDonald Obs. in Texas, 1 in MPEC 2012-R14 -- 2012 RO1
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2012-R12 -- 2012 QG42, 2012 BT23, 2008 SS251
C91Montevenere Obs., 1 in MPEC 2012-R12 -- 2012 QG42
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-R14 -- 2012 RO1
J93Mt. Tuffley Obs. in England, 1 in MPEC 2012-R12 -- 2012 QG42
C23Olmen Obs. in Belgium, 1 in MPEC 2012-R12 -- 2012 QG42
H23Pear Tree Obs. in Florida, 1 in MPEC 2012-R12 -- 2012 QG42
122Pises Obs. in France, 1 in MPEC 2012-R12 -- 331963
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-R12 -- 2012 QG42
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-R12 -- 2012 QG42
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-R14 -- 2012 RO1
B70Sant Celoni Obs. in Spain, 1 in MPEC 2012-R12 -- 2012 QG42
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2012-R12 -- 2012 QG42, 2010 ED43
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-R12 -- 2012 QG42
J84South Obs. in England, 2 in MPEC 2012-R12 -- 2012 QG42, 1998 QC1
A92Urseanu Obs. in Romania, 2 in MPEC 2012-R12 -- 2012 QG42, 330825
G56Walnut Creek Obs. in northern California, 1 in MPEC 2012-R12 -- 2012 PS17
718Wiggins Obs. in Utah, 2 in MPEC 2012-R12 -- 2012 QG42, 2012 QE50
J08Zonalunar Obs. in Spain, 1 in MPEC 2012-R12 -- 2012 QG42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 QB18JPL Sentry1619R E M O V E DJPL: Risk listing removed at 0851 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 8 September '12

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

1928Grabbed MPEC 2012-R14 - 2012 RO1 - see above
1620Generated Traffic Report
1619Noted that JPL Sentry has removed 2012 QB18 as an impact risk - see above
Grabbed MPEC 2012-R12 - Daily Orbit Update - see above
Grabbed MPEC 2012-R13 - 2009 BW2 - see above