Contents  on 20 November '08

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 20 November '08

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eight objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 20 November '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-W27 - "17:13 UT" - 2008 UK90


MPEC 2008-W26 - "13:17 UT" - 2008 WQ2


MPEC 2008-W25 - "13:14 UT" - 2008 WP2


MPEC 2008-W24 - "13:12 UT" - 2008 WO2


MPEC 2008-W23 - "13:09 UT" - 2008 WN2


MPEC 2008-W22 - "11:40 UT" - 2002 XB


<< DOU on 20 Nov. '08 >>  MPEC 2008-W21 - "07:08 UT" - Daily Orbit Update


MPEC 2008-W20 - "00:34 UT" - 2008 WQ1


MPEC 2008-W19 - "00:31 UT" - 2008 WP1


MPEC 2008-W18 - "00:16 UT" - 2004 XK3

Observers  on 20 November '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPEC 2008-W21 -- 2008 WL, 2008 WD, 2008 VZ3, 2008 VK14, 2008 VA15, 2008 UZ201, 2008 UW99, 2008 UU1, 2008 UC95, 2008 UB95, 2008 TC2, 2008 SV7, 2008 SS251, 2008 SR, 2008 SO1, 2008 SE
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2008-W19, 2008-W21 & 2008-W26 -- 2008 WQ2, 2008 WP1, 2008 TK157, 2008 SX245, 2008 QD1, 2007 YZ, 2003 WD158, 189552, 17511, 154991, 153306, 144901, 9856, 5011, 1865, 1627
A77Chante-Perdrix Obs. in France, 1 in MPEC 2008-W21 -- 163000
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-W21 -- 2008 TE157, 2008 SS251, 2000 OM
J27El Guijo Obs. in Spain, 3 in MPEC 2008-W21 -- 2006 SZ217, 2001 LM5, 199801
J95Great Shefford Obs. in England, 3 in MPECs 2008-W18, 2008-W19 & 2008-W20 -- 2008 WQ1, 2008 WP1, 2004 XK3
704LINEAR in New Mexico, 15 in MPECs 2008-W18, 2008-W20 & 2008-W21 -- 2008 WQ1, 2008 WL, 2008 WK, 2008 WE, 2008 TK157, 2008 MZ, 2006 SZ217, 2004 XK3, 90075, 52762, 199801, 189552, 144901, 5011, 1865
J75La Sagra Obs. in Spain, 6 in MPECs 2008-W21 & 2008-W23 -- 2008 WN2, 2008 TK157, 2008 SE, 90075, 20460, 1865
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2008-W21, 2008-W24 & 2008-W25 -- 2008 WP2, 2008 WO2, 2008 WN, 2005 RC, 2001 SK9, 189630, 177651, 153814, 138847
H61Newcastle Obs., 3 in MPEC 2008-W21 -- 5143, 1916, 1865
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2008-W21 -- 2008 VU4, 2008 UE7, 2008 RY24, 2008 RG98, 2008 MZ, 2006 SZ217, 1994 AW1
J53Posadas Obs. in Spain, 1 in MPEC 2008-W21 -- 1620
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2008-W23, 2008-W25 & 2008-W26 -- 2008 WQ2, 2008 WP2, 2008 WN2
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-W21 -- 2008 WK
233San Vito Obs. in Italy, 1 in MPEC 2008-W21 -- 1620
H36Sandlot Obs. in Kansas, 5 in MPECs 2008-W21 & 2008-W22 -- 2008 VN, 2008 VK14, 2008 VF, 2008 UC95, 2002 XB
B40Skylive Obs. in Italy, 1 in MPEC 2008-W18 -- 2004 XK3
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2008-W21, 2008-W23 & 2008-W27 -- 2008 WN2, 2008 WN, 2008 UK90, 2008 SR, 194386, 138859
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2008-W21 & 2008-W23 -- 2008 WN2, 2008 WN, 2008 VL14, 2008 UW99, 2008 UV91, 2008 UU95, 2008 TJ157
A78Stia Obs. in Italy, 6 in MPEC 2008-W21 -- 2008 VK14, 2008 VF, 2008 UE7, 2008 MZ, 162900, 137799
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-W23, 2008-W25 & 2008-W26 -- 2008 WQ2, 2008 WP2, 2008 WN2
H53Thompsonville Obs. in Illinois, 5 in MPEC 2008-W21 -- 2008 SQ1, 85236, 137805, 3360, 1620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 November '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 WP1NEODyS14192016-2084187.42e-09-5.56-6.030NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2008/11/19.187 to 2008/11/19.985."
JPL Sentry04312022-2107462.6e-08-5.43-6.260JPL: "Analysis based on 10 observations spanning .79770 days (2008-Nov-19.18644 to 2008-Nov-19.98414)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
2008 WLJPL Sentry1419R E M O V E DJPL: Risk listing removed at 1029 UTC.
2008 VL14JPL Sentry14192060-207641.2e-06-3.73-4.010JPL: "Analysis based on 37 observations spanning 10.847 days (2008-Nov-09.2656 to 2008-Nov-20.11291)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
NEODyS14192071-207631.16e-06-3.76-4.020NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2008/11/09.266 to 2008/11/20.114."
2008 UW99JPL Sentry14192085-209325.1e-07-6.45-6.740JPL: "Analysis based on 40 observations spanning 19.730 days (2008-Oct-31.45784 to 2008-Nov-20.18735)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2008 UU95JPL Sentry1419R E M O V E DJPL: Risk listing removed at 0951 UTC.
2004 XK3NEODyS1419R E M O V E D-
JPL Sentry0431R E M O V E DJPL: Risk listing removed at 0202 UTC.

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 20 November '08

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

1858Grabbed MPEC 2008-W27 - 2008 UK90 - see above
1419Noted that NEODyS has removed 2004 XK3 as an impact risk - see above
Noted that JPL Sentry has removed 2008 UU95 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 UW99 risk assessment - see above
Noted that JPL Sentry has updated its 2008 VL14 risk assessment - see above
Noted that NEODyS has updated its 2008 VL14 risk assessment - see above
Noted that JPL Sentry has removed 2008 WL as an impact risk - see above
Noted that NEODyS has posted 2008 WP1 as an impact risk - see above
Grabbed MPEC 2008-W21 - Daily Orbit Update - see above
Grabbed MPEC 2008-W22 - 2002 XB - see above
Grabbed MPEC 2008-W23 - 2008 WN2 - see above
Grabbed MPEC 2008-W24 - 2008 WO2 - see above
Grabbed MPEC 2008-W25 - 2008 WP2 - see above
Grabbed MPEC 2008-W26 - 2008 WQ2 - see above
0431Noted that JPL Sentry has removed 2004 XK3 as an impact risk - see above
Noted that JPL Sentry has posted 2008 WP1 as an impact risk - see above
0040Grabbed MPEC 2008-W18 - 2004 XK3 - see above
Grabbed MPEC 2008-W19 - 2008 WP1 - see above
Grabbed MPEC 2008-W20 - 2008 WQ1 - see above