Contents  on 4 January '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 4 January '11

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seventeen listings on the NEOCP at some point 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 4 January '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-A18 - "20:19 UT" - 2011 AF3


MPEC 2011-A17 - "20:02 UT" - 2011 AE3


MPEC 2011-A16 - "19:57 UT" - 2011 AD3


MPEC 2011-A15 - "19:51 UT" - 2011 AC3


MPEC 2011-A14 - "19:47 UT" - 2011 AB3


MPEC 2011-A13 - "11:18 UT" - 2011 AN1


MPEC 2011-A12 - "10:47 UT" - 2011 AM1


MPEC 2011-A11 - "10:41 UT" - 2011 AL1


MPEC 2011-A10 - "09:37 UT" - 2001 YM4


<< DOU on 4 Jan. '11 >>  MPEC 2011-A09 - "07:11 UT" - Daily Orbit Update

Observers  on 4 January '11

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2011-A09, 2011-A10, 2011-A12, 2011-A14 & 2011-A15 -- 2011 AM1, 2011 AC3, 2011 AB3, 2010 YW, 2010 YS, 2010 YB, 2010 XZ, 2010 XX58, 2010 XW58, 2010 XT51, 2010 XN25, 2010 XK52, 2010 XF3, 2010 XC25, 2010 WZ8, 2010 WY8, 2010 VY139, 2010 UE7, 2010 RP80, 2010 RC130, 2010 JT34, 2009 DV42, 2007 SV11, 2006 CG, 2001 YM4, 2000 AZ93
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-A14 -- 2011 AB3
160Castelmartini Obs. in Italy, 3 in MPECs 2011-A09 & 2011-A12 -- 2011 AM1, 2010 NW117, 1999 XK136
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2011-A09, 2011-A11, 2011-A12, 2011-A17 & 2011-A18 -- 2011 AM1, 2011 AL1, 2011 AF3, 2011 AE3, 2010 RN80, 2006 WY2, 2001 VB2, 198856, 144922, 5496
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2011-A09 & 2011-A14 -- 2011 AB3, 177255
151Eschenberg Obs. in Switzerland, 2 in MPEC 2011-A09 -- 2010 TP54, 2010 JL33
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-A12 -- 2011 AM1
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2011-A09 -- 2010 JL33, 96590
240Herrenberg Obs. in Germany, 1 in MPEC 2011-A09 -- 3838
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-A09 -- 36284
704LINEAR in New Mexico, 6 in MPECs 2011-A09, 2011-A10 & 2011-A11 -- 2011 AL1, 2010 JL33, 2004 YZ23, 2001 YM4, 86324, 137084
H11LightBuckets Obs. Rodeo in New Mexico, 1 in MPEC 2011-A12 -- 2011 AM1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2011-A10, 2011-A12, 2011-A13, 2011-A14, 2011-A15, 2011-A16 & 2011-A18 -- 2011 AN1, 2011 AM1, 2011 AF3, 2011 AD3, 2011 AC3, 2011 AB3, 2001 YM4
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-A09 -- 2010 QA5
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2011-A09 -- 2010 XP51, 2010 VK188, 2010 LR68
118Modra Obs. in Slovakia, 1 in MPEC 2011-A12 -- 2011 AM1
900Moriyama Obs. in Japan, 1 in MPEC 2011-A15 -- 2011 AC3
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-A09, 2011-A13, 2011-A15 & 2011-A16 -- 2011 AN1, 2011 AD3, 2011 AC3, 2010 NW117, 2005 QA5, 2004 BW1
A13Naef Obs. in Switzerland, 2 in MPEC 2011-A09 -- 2007 EM88, 1999 XK136
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-A09 -- 2010 JT34
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2011-A09 -- 2010 YS, 2010 LR68
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-A12 -- 2011 AM1
854Sabino Canyon Obs. in Arizona, 5 in MPECs 2011-A10, 2011-A11, 2011-A12, 2011-A14 & 2011-A15 -- 2011 AM1, 2011 AL1, 2011 AC3, 2011 AB3, 2001 YM4
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-A10, 2011-A12, 2011-A14 & 2011-A15 -- 2011 AM1, 2011 AC3, 2011 AB3, 2001 YM4
204Schiaparelli Obs. in Italy, 7 in MPEC 2011-A09 -- 2010 YR, 2010 WE9, 2007 EJ, 2006 OG15, 2005 WE, 2003 YO3, 2000 AD205
587Sormano Obs. in Italy, 3 in MPEC 2011-A09 -- 2010 YR, 2010 YD, 2010 XC25
291Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2011-A09 -- 2010 XZ67, 2010 XZ, 2010 XW58, 2010 XG25, 2010 WY8, 2010 WH3, 2010 WF3, 2010 VF1, 2010 TL117, 2010 SL13, 2010 JT34, 2000 OH
C51WISE in Earth polar orbit, 6 in MPEC 2011-A09 -- 2010 BC, 2010 AG40, 2009 UN3, 2002 AJ129, 1999 VF22, 1996 FS1
I15Wishing Star Obs. in Rhode Island, 5 in MPEC 2011-A09 -- 2010 WJ, 1997 XS2, 249886, 154715, 5496
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 January '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 (backup) 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 AD3JPL Sentry23592013-21091211.2e-07-7.72-8.780JPL: "Analysis based on 12 observations spanning .08044 days (2011-Jan-04.2298 to 2011-Jan-04.31024)." Diameter approximately 0.016 km. from mean, weighted H=26.6.
2010 YDJPL Sentry1601205812.2e-07-7.49-7.490JPL: "Analysis based on 33 observations spanning 8.0614 days (2010-Dec-25.37287 to 2011-Jan-02.43423)." Diameter approximately 0.016 km. from mean, weighted H=26.6.
NEODyS16012058-205812.1e-07-7.51-7.510NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2010-12-25.374 to 2011-01-02.435."
2010 XW58JPL Sentry16012014-2105207.5e-06-4.86-5.500JPL: "Analysis based on 27 observations spanning 22.941 days (2010-Dec-11.47391 to 2011-Jan-03.41448)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS16012018-2089396.0e-06-4.91-5.410NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2010-12-11.475 to 2011-01-03.415."
2010 XC25JPL Sentry16012048-206554.5e-06-3.18-3.280JPL: "Analysis based on 68 observations spanning 26.077 days (2010-Dec-08.37716 to 2011-Jan-03.454129)." Diameter approximately 0.240 km. from mean, weighted H=20.8.
NEODyS16012048-206574.67e-06-3.18-3.290NEODyS: "Based on 69 optical observations (of which 1 are rejected as outliers) from 2010-12-08.378 to 2011-01-03.455."

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 4 January '11

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

2359Noted that JPL Sentry has posted 2011 AD3 as an impact risk - see above
2100Grabbed MPEC 2011-A17 - 2011 AE3 - see above
Grabbed MPEC 2011-A18 - 2011 AF3 - see above
2000Grabbed MPEC 2011-A14 - 2011 AB3 - see above
Grabbed MPEC 2011-A15 - 2011 AC3 - see above
Grabbed MPEC 2011-A16 - 2011 AD3 - see above
1601Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XW58 risk assessment - see above
Noted that NEODyS has updated its 2010 XW58 risk assessment - see above
Noted that JPL Sentry has updated its 2010 YD risk assessment - see above
Noted that NEODyS has updated its 2010 YD risk assessment - see above
Grabbed MPEC 2011-A09 - Daily Orbit Update - see above
Grabbed MPEC 2011-A10 - 2001 YM4 - see above
Grabbed MPEC 2011-A11 - 2011 AL1 - see above
Grabbed MPEC 2011-A12 - 2011 AM1 - see above
Grabbed MPEC 2011-A13 - 2011 AN1 - see above