17P/Holmes on 1 Nov. 
2007 by Alan Dyer.

Comet 17P/Holmes imaged on November 1st by astrophotographer Alan Dyer in Alberta, Canada. For more about what's been going on with this comet, which exploded on October 23rd and has become naked-eye visible, see ESA's news release and images posted by NASA from Dyer and the Hubble Space Telescope.

Contents  on 16 November '07


Editor's note: On November 14th we launched an additional semi-automated news page, the Traffic Report for Earth's Busy Neighborhood. (It is "automated" in that, like with this page and the CRT, all the data is collected and published by program scripts without human intervention, but, to be exact, it is "semi-automated" since these activities don't yet run unattended.)

The latest news: framed access (best), RSS news feed RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 this year 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 16 November '07

The MPC's NEO Confirmation Page has 16 listings: 7 new, 9 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven new and nine updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 28 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 16 November '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-W10 - "23:42 UT" - 2006 JX

MPEC 2007-W09 - "15:16 UT" - 2007 WC

MPEC 2007-W08 - "15:11 UT" - 2007 WB

MPEC 2007-W07 - "15:08 UT" - 2007 WA

MPEC 2007-W06 - "15:06 UT" - 2007 VF191

MPEC 2007-W05 - "15:02 UT" - 2007 VE191

MPEC 2007-W04 - "14:58 UT" - 2007 VD191

MPEC 2007-W03 - "14:54 UT" - 2007 VC191

MPEC 2007-W02 - "14:49 UT" - 2007 VB191

<< DOU on 16 Nov. '07 >>  MPEC 2007-W01 - "07:13 UT" - Daily Orbit Update

Observers  on 16 November '07

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-W10 -- 2006 JX
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2007-W01, 2007-W06, 2007-W07 & 2007-W08 -- 2007 WB, 2007 WA, 2007 VF191, 138971, 138852
A77Chante-Perdrix Obs. in France, 1 in MPEC 2007-W01 -- 19764
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2007-W02 & 2007-W07 -- 2007 WA, 2007 VB191
J95Great Shefford Obs. in England, 2 in MPECs 2007-W01 & 2007-W05 -- 2007 VE191, 2007 TX18
H51Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-W01 -- 2007 VT6, 2007 VK184, 2007 SE11
704LINEAR in New Mexico, 8 in MPECs 2007-W01 & 2007-W02 -- 2007 VB191, 2005 YW55, 2003 WM7, 85804, 162273, 153201, 8034, 2212
699LONEOS in Arizona, 1 in MPEC 2007-W01 -- 21374
J40Malaga Obs. in Spain, 2 in MPEC 2007-W01 -- 11500, 3200
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2007-W01, 2007-W03, 2007-W04, 2007-W05, 2007-W06, 2007-W07, 2007-W08 & 2007-W09 -- 2007 WC, 2007 WB, 2007 WA, 2007 VF191, 2007 VE191, 2007 VD191, 2007 VC191, 2007 UN12, 2007 UK40
A24New Millennium Obs. in Italy, 20 in MPEC 2007-W01 -- 2007 US6, 2007 SP6, 2007 SE11, 2007 RU12, 2007 LR32, 2004 TY16, 2003 WM7, 1999 AQ10, 1993 TQ2, 99907, 86324, 85804, 68359, 20826, 18736, 143678, 137084, 11500, 3553, 2212
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2007-W01 -- 2007 VX7, 2007 US6, 2007 TG15, 2007 SE11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2007-W01 -- 2007 VD12, 2007 UX1, 2007 US6, 2007 TG15, 2007 SE11, 2007 RU12, 2007 RD20, 2007 PU11, 2007 LR32, 2007 GS3, 1993 TQ2, 153591
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2007-W01 -- 2007 VD184

Impact Risk Monitoring  on 16 November '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now 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
2007 WAJPL Sentry20032036-21061449.5e-06-5.02-5.670JPL: "Analysis based on 26 observations spanning .13895 days (2007-Nov-16.30779 to 2007-Nov-16.44674)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
2007 VE191JPL Sentry18292011-2066931.1e-05-3.80-4.120JPL: "Analysis based on 19 observations spanning .89582 days (2007-Nov-15.26603 to 2007-Nov-16.16185)." Diameter approximately 0.066 km. from mean, weighted H=23.5.
2007 VC191JPL Sentry22082012-2100551.2e-08-5.52-5.910JPL: "Analysis based on 15 observations spanning 1.0394 days (2007-Nov-14.31191 to 2007-Nov-15.35131)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
2007 VH189NEODyS18302011-20902413.37e-07-5.36-6.280NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2007/11/14.352 to 2007/11/15.255."
2007 VG189NEODyS16322009-20891011.98e-08-4.17-4.810NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2007/11/13.425 to 2007/11/15.112."
2007 VK184NEODyS17492044-2070287.36e-05-2.55-2.830NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/11/16.061."
JPL Sentry14182035-2059227.6e-05-2.54-2.820JPL: "Analysis based on 41 observations spanning 3.9208 days (2007-Nov-12.13904 to 2007-Nov-16.05981)." Diameter approximately 0.140 km. from mean, weighted H=22.0.
2007 VD184JPL Sentry1418R E M O V E DJPL: Risk listing removed at 1239 UTC.
2007 UN12NEODyS20032069-2090278.33e-05-6.30-7.100NEODyS: "Based on 120 optical observations (of which 0 are rejected as outliers) from 2007/10/21.373 to 2007/11/15.258."
JPL Sentry14182075-2107272.4e-04-5.92-6.700JPL: "Analysis based on 120 observations spanning 24.885 days (2007-Oct-21.37247 to 2007-Nov-15.25773)." Diameter approximately 0.006 km. from mean, weighted H=28.7.

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 16 November '07

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

2354Grabbed MPEC 2007-W10 - 2006 JX - see above
2208Noted that JPL Sentry has posted 2007 VC191 as an impact risk - see above
2003Noted that NEODyS has updated its 2007 UN12 risk assessment - see above
Noted that JPL Sentry has posted 2007 WA as an impact risk - see above
1829Noted that JPL Sentry has posted 2007 VE191 as an impact risk - see above
Noted that NEODyS has posted 2007 VH189 as an impact risk - see above
1749Noted that NEODyS has updated its 2007 VK184 risk assessment - see above
1631Noted that NEODyS has posted 2007 VG189 as an impact risk - see above
1534Grabbed MPEC 2007-W05 - 2007 VE191 - see above
Grabbed MPEC 2007-W06 - 2007 VF191 - see above
Grabbed MPEC 2007-W07 - 2007 WA - see above
Grabbed MPEC 2007-W08 - 2007 WB - see above
Grabbed MPEC 2007-W09 - 2007 WC - see above
1502Grabbed MPEC 2007-W04 - 2007 VD191 - see above
1459Grabbed MPEC 2007-W02 - 2007 VB191 - see above
Grabbed MPEC 2007-W03 - 2007 VC191 - see above
1419Grabbed MPEC 2007-W01 - Daily Orbit Update - see above
1418Noted that JPL Sentry has updated its 2007 UN12 risk assessment - see above
Noted that JPL Sentry has removed 2007 VD184 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above