Contents  on 26 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 26 August '12

One object reported inside ten LD

One object is reported passing within ten lunar distances (LD) of our planet today. 2012 QH14 exits Earth's Hill sphere, traveling from 3.66 to 4.94 LD. Coming our way next, 2012 QZ16 arrives inside ten LD tomorrow.

This report was generated at 1555 UTC.


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 26 August '12

The MPC's NEO Confirmation Page has 39 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 39 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 53 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 26 August '12

Minor Planet Electronic Circulars

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


MPEC 2012-Q56 - "13:59 UT" - 2005 RZ2


<< DOU on 26 Aug. '12 >>  MPEC 2012-Q55 - "06:03 UT" - Daily Orbit Update


MPEC 2012-Q54 - "00:45 UT" - 2012 QO10

Observers  on 26 August '12

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2012-Q54, 2012-Q55 & 2012-Q56 -- 2012 QY14, 2012 QV2, 2012 QO10, 2012 QJ2, 2012 PX, 2012 PP24, 2012 PA20, 2012 OD1, 2012 MA7, 2005 RZ2, 1990 UO, 256670
I56Beckman Obs. in Spain, 4 in MPEC 2012-Q55 -- 2012 PS17, 2012 PG5, 52387, 7350
B75Betelgeuse Station in Italy, 1 in MPEC 2012-Q55 -- 2012 PG5
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2012-Q54 & 2012-Q55 -- 2012 QO10, 2012 PX, 2006 DY, 214869, 162635, 11054
157Frasso Sabino Obs. in Italy, 3 in MPEC 2012-Q55 -- 2012 PX, 2012 PP24, 2012 OE1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2012-Q55 -- 2004 CR2, 85867
A24New Millennium Obs. in Italy, 25 in MPEC 2012-Q55 -- 2012 OO, 2012 LE11, 2012 BZ76, 2010 OS22, 2009 AV, 2001 QG142, 1998 SV4, 333707, 333578, 333358, 331963, 330825, 329340, 217013, 20460, 162980, 159635, 153415, 138847, 108906, 105140, 9202, 4947, 4587, 4487
716Palmer Divide Obs. in Colorado, 1 in MPEC 2012-Q55 -- 52387
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2012-Q54, 2012-Q55 & 2012-Q56 -- 2012 QO10, 2012 PC20, 2005 RZ2, 170891, 6611, 5143
B38Santa Mama Obs. in Italy, 3 in MPEC 2012-Q55 -- 2010 OS22, 219071, 105140
204Schiaparelli Obs. in Italy, 3 in MPEC 2012-Q55 -- 2012 PA, 2012 OU5, 1999 TX2
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2012-Q55 -- 2012 PJ6, 2012 BT23, 218863, 163454
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2012-Q55 -- 2012 QK14, 2012 QG8, 2012 QD8, 2012 PX, 2012 PK24, 2012 PB20, 2012 PA20, 2008 TC4, 2005 UY6
I76Tesla Obs. in Spain, 1 in MPEC 2012-Q55 -- 2012 QY14
G56Walnut Creek Obs. in northern California, 3 in MPEC 2012-Q55 -- 2012 PX, 2012 PS17, 138847
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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 QG8JPL Sentry1552205726.0e-09-5.11-5.130JPL: "Analysis based on 27 observations spanning 7.7691 days (2012-Aug-17.43953 to 2012-Aug-25.20859)." Diameter approximately 0.690 km. from mean, weighted H=18.5.
NEODyS1552R E M O V E D-
2012 QD8JPL Sentry15522044-2111102.2e-05-3.38-3.400JPL: "Analysis based on 27 observations spanning 7.8852 days (2012-Aug-17.44424 to 2012-Aug-25.32942)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
NEODyS15522042-2097133.99e-05-3.11-3.140NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2012-08-17.445 to 2012-08-25.330."
2012 PK24JPL Sentry15522043-2065143.1e-05-3.76-3.940JPL: "Analysis based on 35 observations spanning 12.719 days (2012-Aug-13.41356 to 2012-Aug-26.13225)." Diameter approximately 0.064 km. from mean, weighted H=23.6.
NEODyS15522045-2057141.19e-05-4.17-4.30NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2012-08-13.414 to 2012-08-26.133."
2012 PB20JPL Sentry15522072-210782.7e-06-5.95-6.510JPL: "Analysis based on 29 observations spanning 10.837 days (2012-Aug-14.48152 to 2012-Aug-25.3183)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
NEODyS15522069-209364.3e-07-6.76-7.10NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-08-14.482 to 2012-08-25.319."
2012 PXJPL Sentry15522067-210862.5e-06-4.97-5.290JPL: "Analysis based on 136 observations spanning 18.802 days (2012-Aug-07.35157 to 2012-Aug-26.1533)." Diameter approximately 0.080 km. from mean, weighted H=23.1.
NEODyS15522100-210015.84e-08-6.68-6.680NEODyS: "Based on 137 optical observations (of which 3 are rejected as outliers) from 2012-08-07.352 to 2012-08-26.154."

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 26 August '12

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

1555Generated Traffic Report
1552Noted that JPL Sentry has updated its 2012 PB20 risk assessment - see above
Noted that NEODyS has updated its 2012 PB20 risk assessment - 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
Noted that JPL Sentry has updated its 2012 QG8 risk assessment - see above
Noted that NEODyS has removed 2012 QG8 as an impact risk - see above
Grabbed MPEC 2012-Q55 - Daily Orbit Update - see above
Grabbed MPEC 2012-Q56 - 2005 RZ2 - see above
0149Grabbed MPEC 2012-Q54 - 2012 QO10 - see above