Contents  on 28 November '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.

NEOCP Activity  on 28 November '11

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2335 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 69 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 28 November '11

Minor Planet Electronic Circulars

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


MPEC 2011-W75 - "22:41 UT" - 2011 WS46


MPEC 2011-W74 - "22:39 UT" - 2011 WR46


MPEC 2011-W73 - "22:37 UT" - 2011 WQ46


MPEC 2011-W72 - "22:35 UT" - 2011 WP46


MPEC 2011-W71 - "22:33 UT" - 2011 WO46


MPEC 2011-W70 - "22:31 UT" - 2011 WN46


MPEC 2011-W69 - "22:29 UT" - 2011 WM46


MPEC 2011-W68 - "22:26 UT" - 2011 WL46


<< DOU on 28 Nov. '11 >>  MPEC 2011-W67 - "06:05 UT" - Daily Orbit Update


MPEC 2011-W66 - "01:35 UT" - Comet P/2011 W1 (Panstarrs)

Observers  on 28 November '11

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
B96Brixiis Obs. in Belgium, 1 in MPEC 2011-W67 -- 2011 UU106
G51Byrne Obs. in southern California, 1 in MPEC 2011-W66 -- P/2011 W1
160Castelmartini Obs. in Italy, 6 in MPEC 2011-W67 -- 2011 UZ275, 2011 UU106, 2011 SR69, 2011 SL102, 170502, 138524
703Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2011-W67 & 2011-W75 -- 2011 WW4, 2011 WS46, 2011 WK5, 2011 UU106, 2007 VH186, 2004 QB17, 2002 XP90, 96315, 304088, 283460, 22771, 170502, 16834, 154330, 136617, 5131, 4183, 3200
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2011-W69, 2011-W71 & 2011-W72 -- 2011 WP46, 2011 WO46, 2011 WM46
448Desert Moon Obs. in New Mexico, 2 in MPEC 2011-W67 -- 2011 WM2, 2011 UZ275
C81Dolomites Obs. in Italy, 5 in MPECs 2011-W67, 2011-W69 & 2011-W74 -- 2011 WR46, 2011 WN15, 2011 WM46, 2011 UU106, 2011 SR69
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-W67 -- 2011 UU106
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 2 in MPECs 2011-W71 & 2011-W74 -- 2011 WR46, 2011 WO46
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-W69 -- 2011 WM46
157Frasso Sabino Obs. in Italy, 1 in MPEC 2011-W67 -- 2006 VY13
C73Galati Obs. in Romania, 7 in MPEC 2011-W67 -- 2011 SR69, 53430, 209924, 175706, 170502, 138852, 1943
203GiaGa Obs. in Italy, 2 in MPEC 2011-W67 -- 2011 UU158, 2011 UU106
J95Great Shefford Obs. in England, 9 in MPECs 2011-W66, 2011-W67, 2011-W68, 2011-W69, 2011-W70, 2011-W71, 2011-W72, 2011-W73 & 2011-W74 -- 2011 WR46, 2011 WQ46, 2011 WP46, 2011 WO46, 2011 WN46, 2011 WM46, 2011 WL46, P/2011 W1, 2011 UU106
B86Hagen Obs. in Germany, 1 in MPEC 2011-W74 -- 2011 WR46
246KLENOT in the Czech Republic, 1 in MPEC 2011-W75 -- 2011 WS46
A14Les Engarouines Obs. in France, 1 in MPEC 2011-W67 -- 6050
130Lumezzane Obs. in Italy, 6 in MPEC 2011-W67 -- 2011 UU158, 2011 SR69, 2011 RR12, 85818, 302831, 8507
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2011-W67, 2011-W68, 2011-W69, 2011-W70, 2011-W71, 2011-W72, 2011-W73, 2011-W74 & 2011-W75 -- 2011 WS46, 2011 WR46, 2011 WQ46, 2011 WP46, 2011 WO46, 2011 WN46, 2011 WM46, 2011 WL46, 101955
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2011-W67, 2011-W68, 2011-W70, 2011-W71, 2011-W72 & 2011-W73 -- 2011 WV2, 2011 WQ46, 2011 WP46, 2011 WO46, 2011 WN46, 2011 WL46, 2003 VE1, 297274, 2201
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2011-W67 -- 137799
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-W66 & 2011-W69 -- 2011 WM46, P/2011 W1
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-W67 -- 2011 SL102
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-W66 -- P/2011 W1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-W66 -- P/2011 W1
J41Raheny Obs. in Ireland, 1 in MPEC 2011-W67 -- 2011 UU106
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2011-W69, 2011-W74 & 2011-W75 -- 2011 WS46, 2011 WR46, 2011 WM46
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2011-W67, 2011-W69, 2011-W72 & 2011-W74 -- 2011 WR46, 2011 WP46, 2011 WM46, 2011 UU106
H36Sandlot Obs. in Kansas, 3 in MPECs 2011-W69, 2011-W70 & 2011-W74 -- 2011 WR46, 2011 WN46, 2011 WM46
204Schiaparelli Obs. in Italy, 13 in MPECs 2011-W66, 2011-W67, 2011-W70, 2011-W71, 2011-W72 & 2011-W74 -- 2011 WW4, 2011 WR46, 2011 WR41, 2011 WP46, 2011 WO46, 2011 WN46, 2011 WK5, P/2011 W1, 2011 VP12, 2011 FZ2, 2007 SP6, 2007 MM13, 96315
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2011-W66, 2011-W67 & 2011-W74 -- 2011 WR46, P/2011 W1, 141079, 5131, 4486
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2011-W67, 2011-W74 & 2011-W75 -- 2011 WS46, 2011 WS2, 2011 WR46, 2011 WL15, 2011 WK5, 2011 WC44, 2011 VG9, 2011 VB, 2011 UZ255, 2011 UU, 2011 UP91, 2011 UE305, 2011 QF3, 2010 OF101, 2005 VN
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-W69 -- 2011 WM46
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 November '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 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
2011 VG9JPL Sentry16262086-210983.1e-06-4.00-4.290JPL: "Analysis based on 51 observations spanning 11.893 days (2011-Nov-15.37847 to 2011-Nov-27.27152)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
NEODyS16262086-208621.81e-06-4.23-4.480NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2011-11-15.379 to 2011-11-27.272."
2011 UE305JPL Sentry1626210923.9e-06-3.86-3.900JPL: "Analysis based on 29 observations spanning 28.066 days (2011-Oct-30.46441 to 2011-Nov-27.53087)." Diameter approximately 0.170 km. from mean, weighted H=21.4.
2011 UZ255JPL Sentry16262066-207222.7e-05-3.79-3.790JPL: "Analysis based on 94 observations spanning 27.844 days (2011-Oct-30.44574 to 2011-Nov-27.28981)." Diameter approximately 0.075 km. from mean, weighted H=23.3.
NEODyS16262072-208332.0e-05-3.91-3.910NEODyS: "Based on 94 optical observations (of which 0 are rejected as outliers) from 2011-10-30.447 to 2011-11-27.291."
2011 UG169NEODyS1626R 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 28 November '11

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

2306Grabbed MPEC 2011-W73 - 2011 WQ46 - see above
Grabbed MPEC 2011-W74 - 2011 WR46 - see above
Grabbed MPEC 2011-W75 - 2011 WS46 - see above
2237Grabbed MPEC 2011-W68 - 2011 WL46 - see above
Grabbed MPEC 2011-W69 - 2011 WM46 - see above
Grabbed MPEC 2011-W70 - 2011 WN46 - see above
Grabbed MPEC 2011-W71 - 2011 WO46 - see above
Grabbed MPEC 2011-W72 - 2011 WP46 - see above
1626Noted that JPL Sentry has updated its 2011 UE305 risk assessment - see above
Noted that NEODyS has removed 2011 UG169 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 UZ255 risk assessment - see above
Noted that NEODyS has updated its 2011 UZ255 risk assessment - see above
Noted that JPL Sentry has updated its 2011 VG9 risk assessment - see above
Noted that NEODyS has updated its 2011 VG9 risk assessment - see above
Grabbed MPEC 2011-W67 - Daily Orbit Update - see above
0157Grabbed MPEC 2011-W66 - Comet P/2011 W1 (Panstarrs) - see above