Contents  on 16 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 16 September '12

One object reported inside ten LD

One asteroid is reported traveling within ten lunar distances (LD) of Earth today. Radar target 2012 QG42 departs from inside ten LD, passing from 8.64 to 10.13 LD.

Coming to the neighborhood next, newly announced 2012 RK15 arrives inside ten LD on September 23rd and 2010 JK1 returns on November 22nd.

This report was updated at 1821 UTC with the discoveries of departed 2012 RM15 (MPEC) and approaching 2012 RK15 (MPEC) as well as follow-up in today's DOU MPEC for 2012 RJ10 and 2012 QG42. Today's first traffic report was generated at 0046 UTC to note the discovery of risk-listed and already departed 2012 RJ10, which was announced late yesterday (MPEC).


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 16 September '12

The MPC's NEO Confirmation Page has 25 listings

When last checked at 2302 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 25 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 51 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 16 September '12

Minor Planet Electronic Circulars

As of last check at 2302 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-S13 - "16:35 UT" - 2012 RP15


MPEC 2012-S12 - "16:33 UT" - 2012 RO15


MPEC 2012-S11 - "16:31 UT" - 2012 RN15


MPEC 2012-S10 - "16:28 UT" - 2012 RM15


MPEC 2012-S09 - "16:26 UT" - 2012 RL15


MPEC 2012-S08 - "16:24 UT" - 2012 RK15


MPEC 2012-S07 - "16:22 UT" - 2012 RJ15


MPEC 2012-S06 - "16:20 UT" - 2012 RH15


MPEC 2012-S05 - "16:18 UT" - 2012 RG15


MPEC 2012-S04 - "16:15 UT" - 2012 RF15


MPEC 2012-S03 - "15:15 UT" - 2002 PC11


<< DOU on 16 Sept. '12 >>  MPEC 2012-S02 - "06:02 UT" - Daily Orbit Update


MPEC 2012-S01 - "02:09 UT" - 2008 SE85

Observers  on 16 September '12

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
I53Armilla Obs., 1 in MPEC 2012-S02 -- 2012 QE50
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2012-S02, 2012-S05, 2012-S06, 2012-S07, 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM15, 2012 RL15, 2012 RK15, 2012 RJ15, 2012 RH15, 2012 RG15, 2012 QG42, 2012 QE50, 2012 PS17
C77Bernezzo Obs. in Italy, 2 in MPECs 2012-S02 & 2012-S10 -- 2012 RM15, 143649
B75Betelgeuse Station in Italy, 1 in MPEC 2012-S10 -- 2012 RM15
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2012-S02, 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM15, 2012 RL15, 2012 RK15, 2012 QY14, 2012 QP17, 2012 QF42, 2005 ST1, 1994 EK, 162900, 154007, 7888
470Ceccano Obs. in Italy, 2 in MPECs 2012-S08 & 2012-S10 -- 2012 RM15, 2012 RK15
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2012-S02, 2012-S04, 2012-S08, 2012-S10 & 2012-S11 -- 2012 RN15, 2012 RM15, 2012 RK15, 2012 RF15, 2012 HS15
G58Chabot Obs. in northern California, 1 in MPEC 2012-S07 -- 2012 RJ15
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2012-S02 & 2012-S10 -- 2012 RM15, 329520
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-S10 -- 2012 RM15
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2012-S02 & 2012-S08 -- 2012 RK15, 2012 QO10
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 15 in MPECs 2012-S01, 2012-S02, 2012-S05, 2012-S06, 2012-S07, 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM15, 2012 RL15, 2012 RK15, 2012 RJ15, 2012 RJ10, 2012 RH15, 2012 RG15, 2012 QG49, 2012 PO28, 2012 ME7, 2008 SE85, 329520
J27El Guijo Obs. in Spain, 1 in MPEC 2012-S02 -- 2012 QE50
I57Elche Obs., 1 in MPEC 2012-S02 -- 2012 QG42
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-S10 -- 2012 RM15
E10!program code "!" (10) via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-S10 -- 2012 RM15
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-S13 -- 2012 RP15
651Grasslands Obs. in Arizona, 6 in MPECs 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM15, 2012 RL15, 2012 RK15
J95Great Shefford Obs. in England, 7 in MPECs 2012-S06, 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM15, 2012 RL15, 2012 RK15, 2012 RH15
D00ISON-Kislovodsk Obs., 1 in MPEC 2012-S02 -- 303262
704LINEAR in New Mexico, 3 in MPECs 2012-S02, 2012-S05 & 2012-S11 -- 2012 RN15, 2012 RG15, 2012 LE11
J38La Vara Obs. in Spain, 1 in MPEC 2012-S02 -- 2012 QG42
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-S10 -- 2012 RM15
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-S05 -- 2012 RG15
900Moriyama Obs. in Japan, 1 in MPEC 2012-S10 -- 2012 RM15
474Mt. John Obs. in New Zealand, 4 in MPECs 2012-S04, 2012-S08, 2012-S09 & 2012-S10 -- 2012 RM15, 2012 RL15, 2012 RK15, 2012 RF15
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2012-S02, 2012-S06 & 2012-S07 -- 2012 RJ15, 2012 RH15, 2012 QE50, 2012 OB1, 2012 BT23, 89136, 170891, 138815
J47Nazaret Obs. in Spain, 1 in MPEC 2012-S02 -- 2012 QG42
A24New Millennium Obs. in Italy, 2 in MPECs 2012-S05 & 2012-S06 -- 2012 RH15, 2012 RG15
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-S04 -- 2012 RF15
204Schiaparelli Obs. in Italy, 16 in MPECs 2012-S02, 2012-S05, 2012-S06, 2012-S08, 2012-S09, 2012-S10, 2012-S11, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RN15, 2012 RM2, 2012 RM15, 2012 RL15, 2012 RK15, 2012 RH15, 2012 RG15, 2012 QG42, 2009 BD2, 2008 CZ21, 2006 CV, 2005 ST1, 2002 EM6, 2000 RN77
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-S04 -- 2012 RF15
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-S02 -- 89136
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2012-S02, 2012-S05, 2012-S09, 2012-S10, 2012-S12 & 2012-S13 -- 2012 RP15, 2012 RO15, 2012 RM15, 2012 RL15, 2012 RG15, 2012 PN28, 2012 PK24, 2010 ON101
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2012-S05, 2012-S06 & 2012-S08 -- 2012 RK15, 2012 RH15, 2012 RG15
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2012-S02 -- 2012 QE50
926Tenagra II Obs. in Arizona, 2 in MPECs 2012-S02 & 2012-S03 -- 2002 PC11, 178871
B18Terskol Obs. in Russia, 1 in MPEC 2012-S10 -- 2012 RM15
718Wiggins Obs. in Utah, 2 in MPECs 2012-S02 & 2012-S10 -- 2012 RM15, 2012 QG42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 September '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2302 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 Sentry1625208913.7e-08-7.65-7.650JPL: "Analysis based on 28 observations spanning 2.6799 days (2012-Sep-13.26348 to 2012-Sep-15.94337)." Diameter approximately 0.029 km. from mean, weighted H=25.3.
2012 PK24JPL Sentry16252051-205942.1e-07-5.92-6.280JPL: "Analysis based on 65 observations spanning 33.752 days (2012-Aug-13.41356 to 2012-Sep-16.16533)." Diameter approximately 0.064 km. from mean, weighted H=23.6.
NEODyS16252044-207499.84e-08-6.25-6.720NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-09-16.166."

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 16 September '12

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

1821Updated Traffic Report
1654Grabbed MPEC 2012-S09 - 2012 RL15 - see above
Grabbed MPEC 2012-S10 - 2012 RM15 - see above
Grabbed MPEC 2012-S11 - 2012 RN15 - see above
Grabbed MPEC 2012-S12 - 2012 RO15 - see above
Grabbed MPEC 2012-S13 - 2012 RP15 - see above
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
Noted that JPL Sentry has updated its 2012 RJ10 risk assessment - see above
Grabbed MPEC 2012-S02 - Daily Orbit Update - see above
Grabbed MPEC 2012-S03 - 2002 PC11 - see above
Grabbed MPEC 2012-S04 - 2012 RF15 - see above
Grabbed MPEC 2012-S05 - 2012 RG15 - see above
Grabbed MPEC 2012-S06 - 2012 RH15 - see above
Grabbed MPEC 2012-S07 - 2012 RJ15 - see above
Grabbed MPEC 2012-S08 - 2012 RK15 - see above
0223Grabbed MPEC 2012-S01 - 2008 SE85 - see above