Contents  on 21 October '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 21 October '12

Eight objects reported inside ten LD

There are eight asteroids reported inside ten lunar distances (LD) of our planet today. Within Earth's Hill sphere, 2012 US18 moves from 3.66 to 1.93 LD and 2012 UF34 enters Earth's Hill sphere, coming from 4.38 to 2.99 LD. Further away, 2012 TP231 is inbound from 6.11 to 5.79 LD while risk-listed 2012 UE is outbound from 5.43 to 8.32 LD and 2012 UF from 8.48 to 9.48 LD. Three other objects exit from within ten LD: 2012 TQ146 passes from 8.92 to 10.92 LD, 2012 TE79 from 9.02 to 10.77 LD, and 2012 TD79 from 9.77 to 12.25 LD.

Headed our way next, 2012 UW9 arrives inside ten LD on October 27th and radar target 2010 JK1 arrives on November 22nd.

This report was generated at 1636 UTC with follow-up in today's DOU MPEC for 2012 UF34, 2012 US18, and departed 2012 UU9 and 2012 UT9.


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 21 October '12

The MPC's NEO Confirmation Page has 43 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 43 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 61 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 21 October '12

Minor Planet Electronic Circulars

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


<< DOU on 21 Oct. '12 >>  MPEC 2012-U63 - "06:10 UT" - Daily Orbit Update

Observers  on 21 October '12

A total of 27 observers appear in today's MPEC.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2012-U63 -- 2012 UF34
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-U63 -- 2012 UF34
300Bisei Spaceguard Center in Japan, 2 in MPEC 2012-U63 -- 2012 UX27, 2012 UF34
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2012-U63 -- 2012 TZ52, 2012 QY14, 2012 QB17, 96536, 96189, 112985, 5751
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPEC 2012-U63 -- 2012 UV9, 2012 UU9, 2012 UT9, 2012 TX78, 2012 TT256, 2012 TS, 2012 TR139, 2012 TQ78, 2012 TO231, 2012 TJ146, 2012 TB259, 2012 TA259, 2012 RL2, 2009 DV42, 2007 TQ24, 2001 KO20, 262623, 232368, 154278
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-U63 -- 2012 TY79, 318411, 4487
113Drebach Obs. in Germany, 1 in MPEC 2012-U63 -- 2012 UF34
151Eschenberg Obs. in Switzerland, 2 in MPEC 2012-U63 -- 2012 UF34, 2002 UA31
C73Galati Obs. in Romania, 1 in MPEC 2012-U63 -- 5731
203GiaGa Obs. in Italy, 5 in MPEC 2012-U63 -- 2012 UF34, 2012 UD, 2012 TG53, 2012 JS11, 330825
J95Great Shefford Obs. in England, 2 in MPEC 2012-U63 -- 2012 US18, 2012 UF34
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-U63 -- 2008 SS251
246KLENOT in the Czech Republic, 2 in MPEC 2012-U63 -- 2012 UF34, 2012 TZ52
046Klet Obs. in the Czech Republic, 1 in MPEC 2012-U63 -- 2012 UF34
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2012-U63 -- 2012 TF79, 2001 QJ142
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2012-U63 -- 2005 UC, 2002 TY68
G84Mt. Lemmon SkyCenter in Arizona, 1 in MPEC 2012-U63 -- 2012 RM2
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPEC 2012-U63 -- 2012 TF79, 2010 VN65, 1996 XW1, 85490, 17182, 159923, 4486
C47Nonndorf Obs. in Austria, 2 in MPEC 2012-U63 -- 2012 UF34, 2012 QF49
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 16 in MPEC 2012-U63 -- 2012 TY79, 2012 TG53, 2012 SA59, 2012 RV16, 2012 QF49, 2012 QB17, 2012 LE11, 2012 JS11, 2009 SB15, 2008 HV4, 2007 HZ, 2005 ST1, 2005 SH19, 2005 JU1, 2002 UA31, 2002 TY68
H36Sandlot Obs. in Kansas, 2 in MPEC 2012-U63 -- 2012 TQ78, 2012 QR50
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-U63 -- 2012 UF34
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2012-U63 -- 2009 TK, 2001 YM2, 2001 KO20, 68350, 331769, 5645
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2012-U63 -- 2012 TS231, 2012 TD53, 2009 TG10
291Spacewatch 1.8m telescope in Arizona, 15 in MPEC 2012-U63 -- 2012 UY9, 2012 TY52, 2012 TV78, 2012 TU, 2012 TT, 2012 TS78, 2012 TO139, 2012 TN139, 2012 TH79, 2012 TF53, 2012 TC43, 2012 SW49, 2012 SN30, 2012 RO1, 2012 GV17
A92Urseanu Obs. in Romania, 1 in MPEC 2012-U63 -- 2012 QF49
I15Wishing Star Obs. in Rhode Island, 7 in MPEC 2012-U63 -- 2012 TZ52, 2012 QF49, 2008 HV4, 2005 SH19, 2002 UA31, 329338, 17182
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 October '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 UE34NEODyS16352025-21001921.11e-05-4.11-4.80NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2012-10-18.394 to 2012-10-20.379."
JPL Sentry00562019-21124091.1e-05-4.17-4.850JPL: "Analysis based on 11 observations spanning 1.9845 days (2012-Oct-18.393522 to 2012-Oct-20.37804)." Diameter approximately 0.069 km. from mean, weighted H=23.5.
2012 UZ33JPL Sentry20232015-2111751.3e-06-1.84-1.990JPL: "Analysis based on 27 observations spanning 2.9850 days (2012-Oct-17.44832 to 2012-Oct-20.43336)." Diameter approximately 0.595 km. from mean, weighted H=18.8.
NEODyS16352015-2099269.97e-07-1.96-2.140NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2012-10-17.449 to 2012-10-20.434."
2012 UY9JPL Sentry1635R E M O V E DJPL: Risk listing removed at 1053 UTC.
NEODyS1635R E M O V E D-
2012 TO139JPL Sentry1635R E M O V E DJPL: Risk listing removed at 1056 UTC.
NEODyS1635R E M O V E D-
2012 TS78JPL Sentry1635209813.2e-10-6.36-6.360JPL: "Analysis based on 52 observations spanning 12.985 days (2012-Oct-08.20071 to 2012-Oct-21.1856)." Diameter approximately 0.690 km. from mean, weighted H=18.4.
NEODyS1635R 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 21 October '12

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

2023Noted that JPL Sentry has posted 2012 UZ33 as an impact risk - see above
1636Generated Traffic Report
1635Noted that JPL Sentry has removed 2012 TO139 as an impact risk - see above
Noted that NEODyS has removed 2012 TO139 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 TS78 risk assessment - see above
Noted that NEODyS has removed 2012 TS78 as an impact risk - see above
Noted that NEODyS has posted 2012 UE34 as an impact risk - see above
Noted that JPL Sentry has removed 2012 UY9 as an impact risk - see above
Noted that NEODyS has removed 2012 UY9 as an impact risk - see above
Noted that NEODyS has posted 2012 UZ33 as an impact risk - see above
Grabbed MPEC 2012-U63 - Daily Orbit Update - see above
0056Noted that JPL Sentry has posted 2012 UE34 as an impact risk - see above