Contents  on 7 September '12

Note: The A/CC news pages may be slow or late at updating on September 7th and the next day or two.

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 7 September '12

No objects reported inside ten LD

No asteroids are reported flying inside ten lunar distances (LD) of Earth today. Approaching our neighborhood next, radar target 2012 QG42 arrives inside ten LD on September 11th and 2010 JK1 on November 22nd.

This report was generated at 1345 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 7 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, 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 7 September '12

Minor Planet Electronic Circulars

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


<< DOU on 7 Sept. '12 >>  MPEC 2012-R11 - "06:02 UT" - Daily Orbit Update

Observers  on 7 September '12

A total of 24 observers appear in today's MPEC.

CodeObserver / observatory
J94Abbeydale Obs. in England, 1 in MPEC 2012-R11 -- 276397
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPEC 2012-R11 -- 2012 QY14, 2012 QX17, 2012 QJ2, 2012 QG49, 2012 QG42, 2012 QF42, 2012 QE50, 2012 QC18, 2012 QB17, 2012 PZ19, 2012 PX, 2012 PS17, 2012 PP24, 2012 PP17, 2012 PN28, 2012 PJ6, 2012 PC20, 2012 NP, 2012 MA7, 2012 LG11
I74Baxter Garden Obs., 2 in MPEC 2012-R11 -- 2012 QB17, 326732
I99Blanquita Obs. in Spain, 1 in MPEC 2012-R11 -- 2012 QG42
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2012-R11 -- 2012 QX17, 1994 EK, 105140, 5143
470Ceccano Obs. in Italy, 1 in MPEC 2012-R11 -- 2012 QG42
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-R11 -- 2012 QD8
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2012-R11 -- 2012 QG42
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-R11 -- 2012 LU7
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 2 in MPEC 2012-R11 -- 2012 QC8, 214869
J95Great Shefford Obs. in England, 1 in MPEC 2012-R11 -- 2012 PX
D00ISON-Kislovodsk Obs., 1 in MPEC 2012-R11 -- 2012 PS17
J38La Vara Obs. in Spain, 1 in MPEC 2012-R11 -- 2012 QG42
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-R11 -- 2012 KY41
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-R11 -- 2010 OS22
C91Montevenere Obs., 2 in MPEC 2012-R11 -- 333578, 219071
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-R11 -- 2012 QO10
A13Naef Obs. in Switzerland, 6 in MPEC 2012-R11 -- 2012 QP17, 2012 QB17, 2012 PS17, 333311, 138847, 9202
204Schiaparelli Obs. in Italy, 6 in MPEC 2012-R11 -- 2012 QG42, 2012 PG6, 2012 JS11, 2010 OD101, 2006 RO36, 1994 EK
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2012-R11 -- 2012 QG42, 331471
510Siegen Obs. in Germany, 1 in MPEC 2012-R11 -- 2012 QG42
J84South Obs. in England, 4 in MPEC 2012-R11 -- 2012 QG42, 2012 QC18, 2012 PX, 2010 OS22
A78Stia Obs. in Italy, 1 in MPEC 2012-R11 -- 2012 QO10
J08Zonalunar Obs. in Spain, 1 in MPEC 2012-R11 -- 2012 QG42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 QD8JPL Sentry13412042-205037.1e-06-3.84-4.130JPL: "Analysis based on 42 observations spanning 19.603 days (2012-Aug-17.44424 to 2012-Sep-06.04738)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
NEODyS13412039-209763.29e-06-4.16-4.160NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2012-08-17.445 to 2012-09-06.048."
2012 PXJPL Sentry1341210821.6e-06-5.29-5.380JPL: "Analysis based on 196 observations spanning 30.789 days (2012-Aug-07.35157 to 2012-Sep-07.14043)." Diameter approximately 0.079 km. from mean, weighted H=23.1.
NEODyS13412100-210016.75e-08-6.63-6.630NEODyS: "Based on 197 optical observations (of which 3 are rejected as outliers) from 2012-08-07.352 to 2012-09-07.141."

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 7 September '12

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

1345Generated Traffic Report
1341Noted that JPL Sentry has updated its 2012 PX risk assessment - see above
Noted that NEODyS has reposted 2012 PX as an impact risk - see above
Noted that JPL Sentry has updated its 2012 QD8 risk assessment - see above
Noted that NEODyS has updated its 2012 QD8 risk assessment - see above
Grabbed MPEC 2012-R11 - Daily Orbit Update - see above