Contents  on 27 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 27 August '12

Two objects reported inside ten LD

Two visitors are reported flying within ten lunar distances (LD) of Earth today. 2012 QH14 is outbound from 4.94 to 6.86 LD and 2012 QZ16 comes inside ten LD, moving from 12.24 to 9.95 LD. No other objects are known to come this close until November.

This report was generated at 1529 UTC with new discoveries 2012 QB18 (MPEC) and 2012 QV17 (MPEC), both risk listed and already departed from the ten-LD "bubble," and follow-up in today's DOU MPEC for 2012 QZ16.


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 27 August '12

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2307 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 50 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 27 August '12

Minor Planet Electronic Circulars

As of last check at 2307 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2012-Q68 - "21:53 UT" - 2001 QM142


MPEC 2012-Q67 - "12:25 UT" - 2012 QD18


MPEC 2012-Q66 - "12:23 UT" - 2012 QC18


MPEC 2012-Q65 - "12:21 UT" - 2012 QB18


MPEC 2012-Q64 - "12:18 UT" - 2012 QA18


MPEC 2012-Q63 - "12:13 UT" - 2012 QZ17


MPEC 2012-Q62 - "12:10 UT" - 2012 QY17


MPEC 2012-Q61 - "12:08 UT" - 2012 QX17


MPEC 2012-Q60 - "12:06 UT" - 2012 QW17


MPEC 2012-Q59 - "12:03 UT" - 2012 QV17


<< DOU on 27 Aug. '12 >>  MPEC 2012-Q58 - "06:03 UT" - Daily Orbit Update


MPEC 2012-Q57 - "00:38 UT" - 2012 QP17

Observers  on 27 August '12

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

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-Q61 -- 2012 QX17
H21Astronomical Research Obs. Westfield in Illinois, 24 in MPECs 2012-Q58, 2012-Q59, 2012-Q60, 2012-Q61, 2012-Q62, 2012-Q63, 2012-Q64, 2012-Q65, 2012-Q66, 2012-Q67 & 2012-Q68 -- 2012 QZ17, 2012 QY17, 2012 QY14, 2012 QX17, 2012 QW17, 2012 QV17, 2012 QD18, 2012 QC18, 2012 QB18, 2012 QB17, 2012 QA18, 2012 PZ19, 2012 PX, 2012 PS17, 2012 PN28, 2012 PN, 2012 PJ6, 2012 PG6, 2012 PG5, 2012 PC20, 2012 OD1, 2012 GK, 2002 XG4, 2001 QM142
I56Beckman Obs. in Spain, 5 in MPEC 2012-Q58 -- 2006 DY, 214869, 7350, 5646, 4587
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2012-Q58, 2012-Q59, 2012-Q60 & 2012-Q61 -- 2012 QX17, 2012 QW17, 2012 QV17, 2012 OE1
470Ceccano Obs. in Italy, 2 in MPECs 2012-Q60 & 2012-Q61 -- 2012 QX17, 2012 QW17
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2012-Q58, 2012-Q59, 2012-Q61, 2012-Q62, 2012-Q64 & 2012-Q65 -- 2012 QZ16, 2012 QY17, 2012 QX17, 2012 QV17, 2012 QP10, 2012 QB18, 2012 QA18, 2012 LK9
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2012-Q59, 2012-Q60 & 2012-Q68 -- 2012 QW17, 2012 QV17, 2001 QM142
157Frasso Sabino Obs. in Italy, 1 in MPEC 2012-Q58 -- 2012 PS17
203GiaGa Obs. in Italy, 3 in MPECs 2012-Q58 & 2012-Q66 -- 2012 QC18, 2009 AV, 2000 RN77
I16IAA-AI Atacama in Chile, 1 in MPEC 2012-Q58 -- 2012 QQ10
900Moriyama Obs. in Japan, 3 in MPECs 2012-Q59, 2012-Q60 & 2012-Q61 -- 2012 QX17, 2012 QW17, 2012 QV17
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2012-Q62, 2012-Q63, 2012-Q64, 2012-Q66 & 2012-Q67 -- 2012 QZ17, 2012 QY17, 2012 QD18, 2012 QC18, 2012 QA18
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2012-Q57, 2012-Q58, 2012-Q65 & 2012-Q68 -- 2012 QP17, 2012 QB18, 2012 PJ6, 2012 BT23, 2011 YA, 2008 SS251, 2002 TY68, 2001 QM142, 87311, 218863, 170891
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2012-Q59 -- 2012 QV17
H36Sandlot Obs. in Kansas, 6 in MPECs 2012-Q60, 2012-Q61, 2012-Q62, 2012-Q64, 2012-Q66 & 2012-Q67 -- 2012 QY17, 2012 QX17, 2012 QW17, 2012 QD18, 2012 QC18, 2012 QA18
204Schiaparelli Obs. in Italy, 3 in MPECs 2012-Q60, 2012-Q61 & 2012-Q65 -- 2012 QX17, 2012 QW17, 2012 QB18
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2012-Q58, 2012-Q59, 2012-Q60, 2012-Q61, 2012-Q62 & 2012-Q64 -- 2012 QY17, 2012 QX17, 2012 QW17, 2012 QV17, 2012 QC8, 2012 QA18
645Sloan Digital Sky Survey (SDSS) in New Mexico, 7 in MPEC 2012-Q58 -- 2003 CC, 2003 AO4, 2000 FL1, 1999 HD1, 1998 QB28, 329291, 310402
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2012-Q57 & 2012-Q58 -- 2012 QP17, 163454
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2012-Q58, 2012-Q59, 2012-Q60, 2012-Q61, 2012-Q63, 2012-Q64 & 2012-Q68 -- 2012 QZ17, 2012 QX17, 2012 QW17, 2012 QV17, 2012 QG8, 2012 QD8, 2012 QA18, 2012 PB20, 2001 QM142
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2012-Q61, 2012-Q65, 2012-Q66 & 2012-Q67 -- 2012 QX17, 2012 QD18, 2012 QC18, 2012 QB18
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-Q58 -- 214869
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2012-Q58 -- 2012 OD1, 2010 OS22, 219071
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 August '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2307 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 Sentry1442210829.2e-08-6.79-6.930JPL: "Analysis based on 16 observations spanning 1.8429 days (2012-Aug-25.4922 to 2012-Aug-27.33507)." Diameter approximately 0.054 km. from mean, weighted H=24.0.
2012 QV17JPL Sentry1442208312.5e-08-7.83-7.830JPL: "Analysis based on 53 observations spanning 2.9712 days (2012-Aug-24.29177 to 2012-Aug-27.26294)." Diameter approximately 0.033 km. from mean, weighted H=25.1.
2012 QG8JPL Sentry1442R E M O V E DJPL: Risk listing removed at 0949 UTC.
2012 QD8JPL Sentry14422044-211082.6e-05-3.29-3.310JPL: "Analysis based on 30 observations spanning 8.8272 days (2012-Aug-17.44424 to 2012-Aug-26.27146)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
NEODyS14422044-209764.15e-05-3.08-3.090NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2012-08-17.445 to 2012-08-26.272."
2012 PB20JPL Sentry14422072-2107124.1e-06-5.73-6.370JPL: "Analysis based on 32 observations spanning 11.812 days (2012-Aug-14.48152 to 2012-Aug-26.29362)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS14422074-209366.88e-07-6.51-6.910NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2012-08-14.482 to 2012-08-26.294."
2012 PXJPL Sentry14422067-210872.6e-06-4.97-5.330JPL: "Analysis based on 140 observations spanning 18.833 days (2012-Aug-07.35157 to 2012-Aug-26.184555)." Diameter approximately 0.080 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 27 August '12

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

2215Grabbed MPEC 2012-Q68 - 2001 QM142 - see above
1529Generated Traffic Report
1442Noted 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 PX risk assessment - see above
Noted that JPL Sentry has posted 2012 QB18 as an impact risk - 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 removed 2012 QG8 as an impact risk - see above
Noted that JPL Sentry has posted 2012 QV17 as an impact risk - see above
Grabbed MPEC 2012-Q58 - Daily Orbit Update - see above
Grabbed MPEC 2012-Q59 - 2012 QV17 - see above
Grabbed MPEC 2012-Q60 - 2012 QW17 - see above
Grabbed MPEC 2012-Q61 - 2012 QX17 - see above
Grabbed MPEC 2012-Q62 - 2012 QY17 - see above
Grabbed MPEC 2012-Q63 - 2012 QZ17 - see above
Grabbed MPEC 2012-Q64 - 2012 QA18 - see above
Grabbed MPEC 2012-Q65 - 2012 QB18 - see above
Grabbed MPEC 2012-Q66 - 2012 QC18 - see above
Grabbed MPEC 2012-Q67 - 2012 QD18 - see above
0118Grabbed MPEC 2012-Q57 - 2012 QP17 - see above