Contents  on 19 November '08


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 19 November '08

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seventeen 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 19 November '08

Minor Planet Electronic Circulars

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

MPEC 2008-W17 - "20:13 UT" - 2008 WP

MPEC 2008-W16 - "14:45 UT" - 2008 WM

MPEC 2008-W15 - "14:42 UT" - 2008 WL

MPEC 2008-W14 - "14:37 UT" - 2008 WK

<< DOU on 19 Nov. '08 >>  MPEC 2008-W13 - "07:07 UT" - Daily Orbit Update

Observers  on 19 November '08

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 23 in MPEC 2008-W13 -- 2008 WE, 2008 WB, 2008 VZ3, 2008 VU3, 2008 VN, 2008 VF, 2008 UZ201, 2008 UE7, 2008 TK157, 2008 TF4, 2008 SR, 2008 SQ, 2008 SP7, 2008 SE, 2008 RT26, 2008 MZ, 2008 LW8, 2006 VB14, 2006 SZ217, 2004 TU11, 2002 VY94, 2001 WJ2, 2001 FX9
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-W13 -- 2008 UE7, 2008 SE, 2004 TU11, 2002 VY94, 2000 FL1, 194386, 162900, 2212, 1620
448Desert Moon Obs. in New Mexico, 1 in MPEC 2008-W13 -- 2008 TD27
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-W13 -- 155110
J95Great Shefford Obs. in England, 3 in MPEC 2008-W13 -- 2008 WB, 2008 VL14, 2008 VK14
704LINEAR in New Mexico, 6 in MPECs 2008-W13, 2008-W14, 2008-W15 & 2008-W17 -- 2008 WP, 2008 WL, 2008 WK, 2008 WE, 189700, 887
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-W13 -- 2008 VG14, 2008 VF, 2008 SQ1, 2008 SP7
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-W14 & 2008-W16 -- 2008 WM, 2008 WK
J69North Obs. in England, 1 in MPEC 2008-W13 -- 53430
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-W13 -- 2008 SQ1, 2005 TZ51, 2003 WX25
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-W17 -- 2008 WP
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-W13 -- 2001 VC76, 6050
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-W13 -- 2008 WC, 2008 VR4, 2008 VL14, 2008 UW99, 2008 UU99, 2008 US2, 2008 UO90, 2008 UE202, 2008 UD1, 2008 TN26, 2008 RX24, 2008 RP108, 2007 GS3
A78Stia Obs. in Italy, 2 in MPEC 2008-W13 -- 2002 VY94, 2001 LM5
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-W14, 2008-W15 & 2008-W17 -- 2008 WP, 2008 WL, 2008 WK
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2008-W13 -- 53430, 162900
H53Thompsonville Obs. in Illinois, 6 in MPEC 2008-W13 -- 2008 SQ1, 2005 TZ51, 85236, 53430, 3360, 1620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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.





Notes for Today's Latest Risk Assessments
2008 WLJPL Sentry18372054-210498.1e-09-6.40-6.990JPL: "Analysis based on 9 observations spanning 1.0441 days (2008-Nov-18.39602 to 2008-Nov-19.4401)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2008 WCJPL Sentry1422R E M O V E DJPL: Risk listing removed at 0959 UTC.
2008 VL14JPL Sentry14222060-207631.1e-06-3.76-4.030JPL: "Analysis based on 34 observations spanning 9.8597 days (2008-Nov-09.2656 to 2008-Nov-19.12527)." Diameter approximately 0.211 km. from mean, weighted H=21.0.
NEODyS14222060-207641.17e-06-3.73-4.050NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2008/11/09.266 to 2008/11/19.126."
2008 VR4JPL Sentry1422R E M O V E DJPL: Risk listing removed at 1005 UTC.
2008 UW99JPL Sentry1422209314.3e-07-6.57-6.570JPL: "Analysis based on 34 observations spanning 18.749 days (2008-Oct-31.45784 to 2008-Nov-19.20674)." Diameter approximately 0.038 km. from mean, weighted H=24.7.

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 November '08

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

2300Grabbed MPEC 2008-W17 - 2008 WP - see above
1837Noted that JPL Sentry has posted 2008 WL as an impact risk - see above
1558Grabbed MPEC 2008-W14 - 2008 WK - see above
Grabbed MPEC 2008-W15 - 2008 WL - see above
Grabbed MPEC 2008-W16 - 2008 WM - see above
1423Grabbed MPEC 2008-W13 - Daily Orbit Update - see above
1422Noted 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 VR4 as an impact risk - see above
Noted that JPL Sentry has removed 2008 WC as an impact risk - see above
0501The NEOCP has become active