Contents  on 30 August '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 30 August '12

One object reported inside ten LD

One visitor is reported to be within ten lunar distances (LD) of our planet today. 2012 QZ16 comes its closest to Earth this time around, reaching 6.97 LD at 0925 UTC.

On approach next, radar target 2012 QG42 arrives inside ten LD on September 11th.

This report was generated at 1507 UTC with follow-up in today's DOU MPEC for 2012 QG42 and for departed 2012 QB18, 2012 QV17, and 2012 PD20.


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 30 August '12

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2346 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of fourteen 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 30 August '12

Minor Planet Electronic Circulars

As of last check at 2346 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-Q81 - "18:58 UT" - 2012 QH49


MPEC 2012-Q80 - "18:22 UT" - 2012 QG49


MPEC 2012-Q79 - "18:20 UT" - 2012 QF49


<< DOU on 30 Aug. '12 >>  MPEC 2012-Q78 - "06:03 UT" - Daily Orbit Update


MPEC 2012-Q77 - "03:20 UT" - 2012 QP10

Observers  on 30 August '12

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2012-Q78, 2012-Q79, 2012-Q80 & 2012-Q81 -- 2012 QV2, 2012 QQ10, 2012 QK45, 2012 QJ2, 2012 QH49, 2012 QG49, 2012 QG42, 2012 QF49, 2012 QC18, 2012 QB18, 2012 QB17, 2012 PX, 2012 PS17, 2012 PP28, 2012 PP17, 2012 PJ6, 2012 PG5, 2012 PD20, 2012 OD1, 333284
160Castelmartini Obs. in Italy, 6 in MPEC 2012-Q78 -- 2009 AV, 2004 SB56, 333578, 265962, 219071, 217013
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-Q81 -- 2012 QH49
470Ceccano Obs. in Italy, 1 in MPEC 2012-Q81 -- 2012 QH49
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2012-Q78, 2012-Q79 & 2012-Q81 -- 2012 QV17, 2012 QH49, 2012 QG42, 2012 QF49, 2012 QB18, 2012 OZ, 2012 MN2, 2012 KM45, 2012 KL45, 2012 KJ18, 2012 BC20, 2007 YK, 2007 TR65, 89355, 232368
822Cordoba Obs. in Argentina, 2 in MPEC 2012-Q78 -- 2012 PG6, 2012 PG5
I39Cruz del Sur Obs. in Argentina, 2 in MPECs 2012-Q78 & 2012-Q79 -- 2012 QF49, 5131
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-Q78 -- 214869
704LINEAR in New Mexico, 2 in MPEC 2012-Q78 -- 2012 QG42, 219071
130Lumezzane Obs. in Italy, 10 in MPEC 2012-Q78 -- 2012 QY14, 2012 QV2, 2012 QB17, 2012 PS17, 2012 PP24, 2012 PC20, 2012 OD1, 2012 BZ76, 2006 OT9, 162980
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-Q78 -- 2012 PK24
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2012-Q79 -- 2012 QF49
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-Q80 -- 2012 QG49
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-Q77 -- 2012 QP10
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-Q77 -- 2012 QP10
I89Nerpio Obs. in Italy, 1 in MPEC 2012-Q78 -- 2012 QG42
A24New Millennium Obs. in Italy, 7 in MPEC 2012-Q78 -- 2010 OS22, 333284, 330825, 219071, 144411, 105140, 4487
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-Q79 -- 2012 QF49
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-Q78, 2012-Q79 & 2012-Q81 -- 2012 QH49, 2012 QG42, 2012 QF49, 2012 OO
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-Q78 -- 2012 PK24
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2012-Q79 & 2012-Q81 -- 2012 QH49, 2012 QF49
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2012-Q79 & 2012-Q81 -- 2012 QH49, 2012 QF49
718Wiggins Obs. in Utah, 1 in MPEC 2012-Q78 -- 2012 QG42
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2012-Q78 -- 2004 SB56
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 August '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2346 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 Sentry1505210816.4e-09-7.90-7.900JPL: "Analysis based on 29 observations spanning 3.8671 days (2012-Aug-25.4922 to 2012-Aug-29.359281)." Diameter approximately 0.056 km. from mean, weighted H=23.9.
2012 QV17NEODyS1505R E M O V E D-
2012 PK24JPL Sentry15052043-2065104.1e-05-3.63-3.710JPL: "Analysis based on 44 observations spanning 14.955 days (2012-Aug-13.41356 to 2012-Aug-28.36813)." Diameter approximately 0.064 km. from mean, weighted H=23.6.
NEODyS15052044-2064121.57e-05-4.03-4.10NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-08-28.369."
2012 PXJPL Sentry1505206712.4e-08-6.88-6.880JPL: "Analysis based on 163 observations spanning 21.875 days (2012-Aug-07.35157 to 2012-Aug-29.227031)." Diameter approximately 0.079 km. from mean, weighted H=23.1.

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 30 August '12

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

1941Grabbed MPEC 2012-Q79 - 2012 QF49 - see above
Grabbed MPEC 2012-Q80 - 2012 QG49 - see above
Grabbed MPEC 2012-Q81 - 2012 QH49 - see above
1507Generated Traffic Report
1505Noted 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 PX risk assessment - see above
Noted that JPL Sentry has updated its 2012 QB18 risk assessment - see above
Noted that NEODyS has removed 2012 QV17 as an impact risk - see above
Grabbed MPEC 2012-Q78 - Daily Orbit Update - see above
0419Grabbed MPEC 2012-Q77 - 2012 QP10 - see above