Contents  on 15 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 15 September '12

One object reported inside ten LD

There is one object reported flying inside ten lunar distances (LD) of our planet today. Radar target 2012 QG42 is outbound from 7.68 to 8.64 LD. Next up, 2010 JK1 arrives inside ten LD on November 22nd.

This report was generated at 1621 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 15 September '12

The MPC's NEO Confirmation Page has 32 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 36 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 15 September '12

Minor Planet Electronic Circulars

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


MPEC 2012-R40 - "21:34 UT" - 2012 RJ10


MPEC 2012-R39 - "21:32 UT" - 2012 RH10


MPEC 2012-R38 - "17:36 UT" - 2010 WE9


MPEC 2012-R37 - "17:34 UT" - 2010 SS3


MPEC 2012-R36 - "17:31 UT" - 2005 QX151


<< DOU on 15 Sept. '12 >>  MPEC 2012-R35 - "06:02 UT" - Daily Orbit Update

Observers  on 15 September '12

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2012-R35 & 2012-R39 -- 2012 RH10, 2000 CR101
I74Baxter Garden Obs. in England, 3 in MPEC 2012-R35 -- 2012 QB17, 1999 TX2, 3908
I56Beckman Obs. in Spain, 3 in MPEC 2012-R35 -- 2012 QE50, 334412, 3200
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-R35 -- 2012 QG42
B75Betelgeuse Station in Italy, 2 in MPEC 2012-R35 -- 2012 QG42, 2012 QE50
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2012-R35 -- 2000 RH60, 88710, 335758, 333311, 329520, 214869, 4587
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 16 in MPECs 2012-R35, 2012-R39 & 2012-R40 -- 2012 RN6, 2012 RL2, 2012 RJ10, 2012 RH3, 2012 RH10, 2012 RG3, 2012 RB3, 2012 QJ45, 2012 MK6, 2012 HY1, 2012 BB124, 2009 DD1, 2005 TF15, 2004 XN14, 2002 RV112, 2001 UF18
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-R35 -- 2012 QG42
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-R39 -- 2012 RH10
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPECs 2012-R35, 2012-R39 & 2012-R40 -- 2012 RJ10, 2012 RH10, 2012 QG49, 2012 PO28, 2012 OT5, 2012 ME7, 178871
J27El Guijo Obs. in Spain, 1 in MPEC 2012-R35 -- 2012 QG42
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-R35 -- 2012 QC8
C73Galati Obs. in Romania, 7 in MPEC 2012-R35 -- 2012 PG5, 2012 OP4, 2012 NP, 2007 RT19, 330825, 214869, 138847
J95Great Shefford Obs. in England, 2 in MPECs 2012-R39 & 2012-R40 -- 2012 RJ10, 2012 RH10
J81Guirguillano Obs. in Spain, 1 in MPEC 2012-R35 -- 330825
D00ISON-Kislovodsk Obs., 3 in MPEC 2012-R35 -- 2007 HZ, 96536, 67399
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2012-R35 -- 2012 QG42
704LINEAR in New Mexico, 8 in MPECs 2012-R35 & 2012-R39 -- 2012 RH10, 2012 QO10, 2012 JR17, 2000 RH60, 335746, 333311, 162980, 159635
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-R35 -- 87684
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2012-R35 & 2012-R38 -- 2012 PK24, 2012 EC, 2010 WE9
900Moriyama Obs. in Japan, 1 in MPEC 2012-R39 -- 2012 RH10
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-R40 -- 2012 RJ10
J93Mt. Tuffley Obs. in England, 3 in MPEC 2012-R35 -- 2012 QG42, 329520, 214869
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 17 in MPEC 2012-R35 -- 2012 QG42, 2012 QE50, 2012 PG5, 2012 HO15, 2006 DY, 2000 RH60, 1998 QC1, 333889, 330825, 329520, 326732, 276397, 219071, 143649, 4769, 4487, 4179
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-R39 & 2012-R40 -- 2012 RJ10, 2012 RH10
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-R39 -- 2012 RH10
J84South Obs. in England, 1 in MPEC 2012-R35 -- 2012 QG42
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2012-R35 -- 2012 PO28, 2012 PN28, 2012 PK24, 2012 EU14, 2011 GQ61, 2000 CR101
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2012-R39 & 2012-R40 -- 2012 RJ10, 2012 RH10
954Teide Obs. in the Canary Islands, 2 in MPECs 2012-R39 & 2012-R40 -- 2012 RJ10, 2012 RH10
926Tenagra II Obs. in Arizona, 11 in MPECs 2012-R35, 2012-R36, 2012-R37, 2012-R39 & 2012-R40 -- 2012 RO1, 2012 RM2, 2012 RJ10, 2012 RH3, 2012 RH10, 2012 QQ50, 2012 QG42, 2011 UG21, 2010 SS3, 2005 QX151, 2004 RX10
B18Terskol Obs. in Russia, 1 in MPEC 2012-R39 -- 2012 RH10
J08Zonalunar Obs. in Spain, 2 in MPEC 2012-R35 -- 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 15 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 RJ10JPL Sentry23592089-209622.3e-07-6.85-6.880JPL: "Analysis based on 25 observations spanning 1.8207 days (2012-Sep-13.26348 to 2012-Sep-15.08416)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2012 PK24JPL Sentry16192051-205942.8e-07-5.80-6.210JPL: "Analysis based on 62 observations spanning 32.709 days (2012-Aug-13.41356 to 2012-Sep-15.12289)." Diameter approximately 0.064 km. from mean, weighted H=23.6.
NEODyS16192051-205951.21e-07-6.17-6.630NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-09-15.124."

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 15 September '12

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

2359Noted that JPL Sentry has posted 2012 RJ10 as an impact risk - see above
2311Grabbed MPEC 2012-R39 - 2012 RH10 - see above
Grabbed MPEC 2012-R40 - 2012 RJ10 - see above
1740Grabbed MPEC 2012-R36 - 2005 QX151 - see above
Grabbed MPEC 2012-R37 - 2010 SS3 - see above
Grabbed MPEC 2012-R38 - 2010 WE9 - see above
1621Generated Traffic Report
1619Noted 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-R35 - Daily Orbit Update - see above