Contents  on 19 October '11

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.

Radar Astrometry  on 19 October '11

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2304 UTC when the database was dated 19 Oct.

NEOCP Activity  on 19 October '11

The MPC's NEO Confirmation Page has 33 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 33 objects listed. Of these, 22 were "one nighters." So far The Tracking News has counted a total of 51 listings on the NEOCP today.

New MPECs  on 19 October '11

Minor Planet Electronic Circulars

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


MPEC 2011-U22 - "17:45 UT" - 2011 UL10


MPEC 2011-U21 - "17:44 UT" - 2011 UK10


MPEC 2011-U20 - "17:42 UT" - 2011 UJ10


MPEC 2011-U19 - "17:40 UT" - 2011 UH10


MPEC 2011-U18 - "17:38 UT" - 2011 UG10


MPEC 2011-U17 - "17:37 UT" - 2011 UF10


MPEC 2011-U16 - "17:35 UT" - 2011 UE10


MPEC 2011-U15 - "15:01 UT" - 2003 YJ


<< DOU on 19 Oct. '11 >>  MPEC 2011-U14 - "06:02 UT" - Daily Orbit Update

Observers  on 19 October '11

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2011 UB
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-U18 -- 2011 UG10
160Castelmartini Obs. in Italy, 2 in MPEC 2011-U14 -- 2011 SQ12, 297418
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2011-U14, 2011-U18, 2011-U21 & 2011-U22 -- 2011 UL10, 2011 UK10, 2011 UG10, 2011 UD, 2011 TG2, 2011 QZ13, 2011 OV4, 2011 MO4, 2004 QB17, 1991 TF3, 39572, 285625, 283460, 283457, 16834, 154302, 7341, 7092, 4183, 3988, 3691
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2011-U14, 2011-U15 & 2011-U21 -- 2011 UK10, 2011 UA, 2011 TK5, 2011 SO32, 2011 SM68, 2011 SJ16, 2011 SF3, 2011 QF23, 2011 KF4, 2006 UQ217, 2004 RU10, 2003 YJ
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2011-U14 -- 2011 TN9
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-U14 -- 2011 TN9, 2011 SQ12, 2011 KF4
046Klet Obs. in the Czech Republic, 5 in MPEC 2011-U14 -- 2011 TG2, 2011 TA4, 2011 SR69, 2011 SQ12, 2011 LJ19
704LINEAR in New Mexico, 4 in MPEC 2011-U14 -- 2011 MD11, 1990 UA, 54071, 138155
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-U14 -- 2011 JA8
932McCarthy Obs. in Connecticut, 1 in MPEC 2011-U14 -- 2011 TN9
108Montelupo Obs. in Italy, 6 in MPEC 2011-U14 -- 2011 TN9, 2011 SQ12, 297418, 283460, 7341, 1036
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-U14, 2011-U16, 2011-U17, 2011-U19 & 2011-U20 -- 5025 P-L, 2011 UJ10, 2011 UH10, 2011 UF10, 2011 UE10, 2008 VH
J93Mt. Tuffley Obs. in England, 1 in MPEC 2011-U14 -- 1036
A24New Millennium Obs. in Italy, 15 in MPEC 2011-U14 -- 2011 SQ12, 2011 OQ5, 2011 MO4, 2006 SQ78, 1991 TF3, 96189, 297418, 283460, 209924, 20826, 163081, 7341, 5653, 3988, 3691
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2011-U14 & 2011-U21 -- 2011 UK10, 2011 SH189, 2011 SE248, 2011 QE14, 2011 OQ5, 85713, 159399, 152942, 5653, 1981
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-U14 -- 88188
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2011-U18 & 2011-U22 -- 2011 UL10, 2011 UG10
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-U16 & 2011-U20 -- 2011 UJ10, 2011 UE10
204Schiaparelli Obs. in Italy, 5 in MPEC 2011-U14 -- 2011 TX8, 2011 TN9, 2011 SS25, 2011 SE248, 2011 MO4
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-U22 -- 2011 UL10
510Siegen Obs. in Germany, 3 in MPEC 2011-U14 -- 2011 TN9, 2011 HC36, 1036
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-U14 -- 90075
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2011-U14, 2011-U17, 2011-U18, 2011-U20 & 2011-U21 -- 2011 UK10, 2011 UJ10, 2011 UG10, 2011 UF10, 2011 UA, 2011 SZ21, 2011 SW71, 2011 SV71, 2011 SU68, 2011 SU67, 2011 SR12, 2011 SJ189, 2011 SH189, 2011 SG16, 2011 SE108, 2011 OA
A98Taurus-1 Obs. in Belarus, 3 in MPEC 2011-U14 -- 2011 SQ12, 2011 KF4, 2004 JO2
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2011-U14 -- 96315, 3691
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 October '11

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 CLOMON 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
2011 UTNEODyS15432034-208895.79e-07-6.59-6.940NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2011-10-17.412 to 2011-10-18.453."
2011 SV71JPL Sentry1543R E M O V E DJPL: Risk listing removed at 0849 UTC.
NEODyS1543R E M O V E D-
2011 QF48NEODyS15432067-206723.48e-07-6.40-6.510NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2011-08-30.702 to 2011-09-20.481."

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 19 October '11

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

2304Noted Radar Astrometry database update - see above
1800Grabbed MPEC 2011-U16 - 2011 UE10 - see above
Grabbed MPEC 2011-U17 - 2011 UF10 - see above
Grabbed MPEC 2011-U18 - 2011 UG10 - see above
Grabbed MPEC 2011-U19 - 2011 UH10 - see above
Grabbed MPEC 2011-U20 - 2011 UJ10 - see above
Grabbed MPEC 2011-U21 - 2011 UK10 - see above
Grabbed MPEC 2011-U22 - 2011 UL10 - see above
1543Noted that NEODyS has updated its 2011 QF48 risk assessment - see above
Noted that JPL Sentry has removed 2011 SV71 as an impact risk - see above
Noted that NEODyS has removed 2011 SV71 as an impact risk - see above
Noted that NEODyS has posted 2011 UT as an impact risk - see above
Grabbed MPEC 2011-U14 - Daily Orbit Update - see above
Grabbed MPEC 2011-U15 - 2003 YJ - see above