Contents  on 24 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 24 August '12

Two objects reported inside ten LD

Two asteroids are reported within ten lunar distances (LD) of Earth today. 2012 QH14 enters Earth's Hill sphere, moving from 5.19 to 3.78 LD. Further away, 2012 PZ17 is outbound from 9.22 to 9.96 LD. No other objects are known to be coming this close until November.

This report was generated at 1529 UTC with follow-up in today's DOU MPEC for 2012 QM14 and 2012 QH14 as well as observation of 2011 YH40 from January.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 24 August '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 33 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 24 August '12

Minor Planet Electronic Circulars

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


MPEC 2012-Q46 - "15:27 UT" - 2012 QY14


<< DOU on 24 Aug. '12 >>  MPEC 2012-Q45 - "06:03 UT" - Daily Orbit Update

Observers  on 24 August '12

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2012-Q45 -- 214869
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-Q45 & 2012-Q46 -- 2012 QY14, 2012 QL14, 2012 PX, 2012 PS17, 2012 PP28, 2012 PP24, 2012 PP17, 2012 PM28, 2012 PJ6, 2012 PG6, 2012 PG5, 2012 OA1, 2012 LD1
I56Beckman Obs. in Spain, 3 in MPEC 2012-Q45 -- 2012 PP17, 2012 LU7, 4487
B96Brixiis Obs. in Belgium, 1 in MPEC 2012-Q46 -- 2012 QY14
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-Q46 -- 2012 QY14
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-Q46 -- 2012 QY14
157Frasso Sabino Obs. in Italy, 1 in MPEC 2012-Q45 -- 2008 CZ21
I16IAA-AI Atacama in Chile, 1 in MPEC 2012-Q45 -- 2012 QQ10
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-Q45 -- 2012 QL14, 2012 QH14
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2012-Q45 -- 2012 QM14
118Modra Obs. in Slovakia, 1 in MPEC 2012-Q46 -- 2012 QY14
900Moriyama Obs. in Japan, 1 in MPEC 2012-Q46 -- 2012 QY14
474Mt. John Obs. in New Zealand, 12 in MPECs 2012-Q45 & 2012-Q46 -- 2012 QY14, 2012 QV2, 2012 QP10, 2012 QH8, 2012 QD8, 2012 PX, 2012 PS4, 2012 PO28, 2012 PN6, 2012 PH6, 2012 PG5, 2012 PA
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-Q45 -- 2012 OC1
716Palmer Divide Obs. in Colorado, 14 in MPEC 2012-Q45 -- 2012 LZ1, 2012 DO, 2011 YH40, 2011 WV134, 2008 CN1, 68950, 326732, 230111, 192642, 179806, 153958, 141018, 3352, 1685
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2012-Q45 & 2012-Q46 -- 2012 QY14, 2012 QL14
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2012-Q45 -- 2012 PX, 2012 PS17, 2012 PP24, 2012 PP17, 2012 PG6, 2012 PG5, 2012 PC20, 2012 OD1, 2012 MK6, 2012 LU7, 2010 OS22, 2009 AV, 2000 RN77, 333284
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-Q45 -- 333707
B38Santa Mama Obs. in Italy, 4 in MPEC 2012-Q45 -- 2010 OS22, 2009 AV, 105140, 2100
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2012-Q45 -- 2012 PK24
G56Walnut Creek Obs. in northern California, 2 in MPEC 2012-Q45 -- 2012 PS17, 52387
I42Westport Obs. in Massachusetts, 4 in MPEC 2012-Q45 -- 2000 RN77, 219071, 138847, 108906
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 August '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 Sentry15262044-2111161.9e-05-3.43-3.570JPL: "Analysis based on 21 observations spanning 6.1067 days (2012-Aug-17.44424 to 2012-Aug-23.55093)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
NEODyS15262032-2059101.4e-04-2.55-2.660NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2012-08-17.445 to 2012-08-23.552."
2012 PK24JPL Sentry15262043-2076153.3e-05-3.73-3.920JPL: "Analysis based on 29 observations spanning 10.774 days (2012-Aug-13.41356 to 2012-Aug-24.18796)." Diameter approximately 0.063 km. from mean, weighted H=23.7.
NEODyS15262038-2094181.21e-05-4.17-4.290NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-08-24.189."
2012 PXJPL Sentry15262067-210874.1e-06-4.77-5.070JPL: "Analysis based on 106 observations spanning 16.105 days (2012-Aug-07.35157 to 2012-Aug-23.45625)." Diameter approximately 0.080 km. from mean, weighted H=23.1.
NEODyS15262067-209661.9e-06-5.01-5.150NEODyS: "Based on 107 optical observations (of which 2 are rejected as outliers) from 2012-08-07.352 to 2012-08-23.457."
1999 SF10NEODyS1526R E M O V E D-

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 24 August '12

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

1630Grabbed MPEC 2012-Q46 - 2012 QY14 - see above
1529Generated Traffic Report
1526Noted that NEODyS has removed 1999 SF10 as an impact risk - see above
Noted 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 NEODyS has updated its 2012 PX risk assessment - 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-Q45 - Daily Orbit Update - see above