17 Nov '07 Tracking News

Contents on 17 November '07

IAU Minor Planet Center
- NEOCP Activity -- twelve listings: 8 new, 4 updated
- New MPECs -- seven MPECs
- Observers -- fourteen observing facilities
Impact Risk Monitoring -- six objects reported
Chronology

Resources:

Consolidated Risk Tables - CRT page
Earth's Busy Neighborhood Traffic Report
Old & new CRT Archive
Ephemerides for risk-rated and nearby objects
Old News Archive & Small Objects Archive

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 (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 17 November '07

The MPC's NEO Confirmation Page has 12 listings: 8 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and four updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 23 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 17 November '07

Minor Planet Electronic Circulars

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

MPEC 2007-W11 time-stamped "07:12 UT" - Daily Orbit Update - see below
MPEC 2007-W12 time-stamped "21:49 UT" - 2007 VL243 - see below
MPEC 2007-W13 time-stamped "21:52 UT" - 2007 VM243 - see below
MPEC 2007-W14 time-stamped "21:58 UT" - 2007 VN243 - see below
MPEC 2007-W15 time-stamped "22:03 UT" - 2007 VO243 - see below
MPEC 2007-W16 time-stamped "22:09 UT" - 2007 VP243 - see below
MPEC 2007-W17 time-stamped "22:12 UT" - 2007 WE

MPEC 2007-W17 - "22:12 UT" - 2007 WE

K07W00E 2007 WE (H=19.8 ~371m) was discovered at 0430 UT on 16 Nov. by the Mt. Lemmon Survey (MLS), which observed it at Nov. 16.19p4 and 17.23-25p4. The discovery was confirmed by Astronomical Research Obs. (ARO) (Nov. 16.26-27p3).

MPEC 2007-W16 - "22:09 UT" - 2007 VP243

K07VO3P 2007 VP243 (Earth MOID=8.5 LD, H=21.7 ~155m) was discovered at 0622 UT on 15 Nov. by the MLS, which observed it at Nov. 15.27-28p4 and 17.23-25p4. The discovery was confirmed by ARO (Nov. 16.17-18p3) and Kanab Obs. (Nov. 16.28-34p3).

MPEC 2007-W15 - "22:03 UT" - 2007 VO243

K07VO3O 2007 VO243 (H=19.4 ~446m) was discovered at 0618 UT on 15 Nov. by the Catalina Sky Survey (CSS), which observed it at Nov. 15.26-28p4, 15.35-39p4, 16.31-32p4, and 17.30-31p4. The discovery was confirmed by ARO (Nov. 16.24-25p3), Junk Bond Obs. (Nov. 17.36-43p4), and Mt. John Obs. (Nov. 17.54-55p3).

MPEC 2007-W14 - "21:58 UT" - 2007 VN243

K07VO3N 2007 VN243 (small asteroid, Earth MOID=0.8 LD, H=22.1 ~129m) was discovered at 0551 UT on 15 Nov. by the MLS, which observed it at Nov. 15.24-26p4 at V=22.1, 15.33-35p4, and 17.31-33p4. The discovery was confirmed by ARO (Nov. 16.24-25p3).

MPEC 2007-W13 - "21:52 UT" - 2007 VM243

K07VO3M 2007 VM243 (H=20.9 ~224m) was discovered at 0357 UT on 15 Nov. by the MLS, which observed it at Nov. 15.17-18p4, 15.22-23p4, 16.12p3, and 17.14-16p4. The discovery was confirmed by Great Shefford Obs. (Nov. 15.93-95p2), ARO (Nov. 16.13-14p3), and Kanab Obs. (Nov. 16.13-18p3).

MPEC 2007-W12 - "21:49 UT" - 2007 VL243

K07VO3L 2007 VL243 (i=42.6°, q=0.270 AU, H=17.8 ~933m) was discovered at 1530 UT on 14 Nov. by the Siding Spring Survey (SSS), which observed it at Nov. 14.65-69p4, 15.69-70p4, 16.62p1, and 16.68p1. The discovery was confirmed by Mt. John Obs. (Nov. 17.60-61p3).

<< DOU on 17 Nov. '07 >> MPEC 2007-W11 - "07:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K07W00A 2007 WA (small asteroid, arc=0 days, H=24.7 ~39m) from Shenton Park Obs. (Nov. 16.68-69p3)
K07VJ1E 2007 VE191 (small asteroid, arc=1 day, H=23.7 ~62m) from ARO (Nov. 16.15-16p3)
K07VI4K 2007 VK184 (almost small, arc=5 days, H=22.0 ~135m) from Shenton Park Obs. (Nov. 16.64-65p3) and Consell Obs. (Nov. 16.90-91p5)
Observations of recently (no longer) risk-listed objects
K07V12D 2007 VD12 (arc=11 days, H=20.1 ~323m) from Saint-Barthelemy Obs. (Nov. 16.04p1, 16.12p1 & 16.17p1), Petit Jean Mtn. South Obs. (PJMSO) (Nov. 16.29-30p7), and Shenton Park Obs. (Nov. 16.70-71p3)
Observations of small asteroids (H>22.0)
K07VJ1F 2007 VF191 (arc=1 day, H=22.2 ~123m) from ARO (Nov. 16.26-27p3)
K07VD8D 2007 VD138 (Q=4.603 AU, arc=7 days, H=24.5 ~43m) from Shenton Park Obs. (Nov. 15.70p1 & 16.71p1)
K07V83V 2007 VV83 (arc=9 days, H=24.7 ~39m) from SSS (Nov. 16.63-64p2)
K07V08K 2007 VK8 (arc=11 days, H=23.1 ~81m) from SSS (Nov. 16.64-65p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K07VI4H 2007 VH184 (Q=4.044 AU, arc=5 days, H=21.9 ~141m) from Shenton Park Obs. (Nov. 16.65p2)
Observations of other objects
K07W00B 2007 WB (arc=1 day, H=19.1 ~513m) from Consell Obs. (Nov. 17.05p5)
K07VI4M 2007 VM184 (arc=5 days, H=21.0 ~214m) from PJMSO (Nov. 16.28-29p7) and Consell Obs. (Nov. 17.03p4)
K07VI4G 2007 VG184 (arc=5 days, H=17.4 ~1.12 km) from Shenton Park Obs. (Nov. 16.51-52p3)
K07V04Q 2007 VQ4 (Q=4.008 AU, arc=13 days, H=16.0 ~2.14 km, q=1.272 AU) from PJMSO (Nov. 16.32-33p7)
K07U06S 2007 US6 (arc=33 days, H=18.3 ~741m) from Saint-Barthelemy Obs. (Nov. 15.85p1, 15.97p1 & 16.02p1)
K07U01X 2007 UX1 (arc=30 days, H=20.5 ~269m) from PJMSO (Nov. 16.27p5)
K07T66C 2007 TC66 (arc=35 days, H=19.4 ~446m) from Shenton Park Obs. (Nov. 16.67p3)
K07T19A 2007 TA19 (arc=38 days, H=19.6 ~407m) from SSS (Nov. 16.48p1)
K07T18X 2007 TX18 (arc=38 days, H=17.3 ~1.17 km) from ARO (Nov. 16.17-18p3)
K07S06P 2007 SP6 (arc=56 days, H=18.1 ~812m) from PJMSO (Nov. 16.32p6)
K07G03S 2007 GS3 (arc=2 opp, H=19.4 ~446m) from PJMSO (Nov. 16.30-31p6)
K05Y55W 2005 YW55 (arc=4 opp, H=19.4 ~446m) from PJMSO (Nov. 16.26p6)
K04X60Y 2004 XY60 (q=0.130 AU, arc=3 opp, H=19.0 ~537m) from SSS (Nov. 16.63p1 & 16.67p1)
K04T16Y 2004 TY16 (arc=4 opp, H=17.0 ~1.35 km) from PJMSO (Nov. 16.31p5)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from PJMSO (Nov. 16.25p6)
G2173 162173 1999 JU3 from CSS (Nov. 16.09-11p4)
G2004 162004 1991 VE from LINEAR (Nov. 14.26-31p4)
E3678 143678 2003 SA224 from San Benedetto Po Obs. (Nov. 12.83-84p3)
54686 54686 2001 DU8 from SSS (Nov. 16.69-72p4)
11500 11500 1989 UR from PJMSO (Nov. 16.33-34p7)

Observers on 17 November '07

Fourteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 8 in MPECs 2007-W11, 2007-W13, 2007-W14, 2007-W15, 2007-W16 & 2007-W17 -- 2007 WE, 2007 VP243, 2007 VO243, 2007 VN243, 2007 VM243, 2007 VF191, 2007 VE191, 2007 TX18
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2007-W11 & 2007-W15 -- 2007 VO243, 162173
`176`	Consell Obs. in Spain, 3 in MPEC 2007-W11 -- 2007 WB, 2007 VM184, 2007 VK184
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-W13 -- 2007 VM243
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2007-W15 -- 2007 VO243
`682`	Kanab Obs. in Utah, 2 in MPECs 2007-W13 & 2007-W16 -- 2007 VP243, 2007 VM243
`704`	LINEAR in New Mexico, 1 in MPEC 2007-W11 -- 162004
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2007-W12 & 2007-W15 -- 2007 VO243, 2007 VL243
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2007-W13, 2007-W14, 2007-W16 & 2007-W17 -- 2007 WE, 2007 VP243, 2007 VN243, 2007 VM243
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2007-W11 -- 2007 VQ4, 2007 VM184, 2007 VD12, 2007 UX1, 2007 SP6, 2007 GS3, 2005 YW55, 2004 TY16, 1993 TQ2, 11500
`B04`	Saint-Barthelemy Obs. in Italy, 2 in MPEC 2007-W11 -- 2007 VD12, 2007 US6
`434`	San Benedetto Po Obs. in Italy, 1 in MPEC 2007-W11 -- 143678
`D21`	Shenton Park Obs. in Western Australia, 7 in MPEC 2007-W11 -- 2007 WA, 2007 VK184, 2007 VH184, 2007 VG184, 2007 VD138, 2007 VD12, 2007 TC66
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2007-W11 & 2007-W12 -- 2007 VV83, 2007 VL243, 2007 VK8, 2007 TA19, 2004 XY60, 54686

Impact Risk Monitoring on 17 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.
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

2007 WC	NEODyS	1631	2033	1	1.71e-11	-10.72	-10.72	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/11/16.345 to 2007/11/16.444."
2007 WC	JPL Sentry	0233	2026-2106	21	2.3e-08	-7.92	-8.52	0	JPL: "Analysis based on 12 observations spanning .09889 days (2007-Nov-16.3441 to 2007-Nov-16.44299)." Diameter approximately 0.028 km. from mean, weighted H=25.4.

2007 WA	JPL Sentry	1435	R E M O V E D						JPL: Risk listing removed at 1156 UTC.

2007 VE191	NEODyS	1631	2015-2044	13	5.92e-06	-3.76	-3.80	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2007/11/15.267 to 2007/11/16.163."

2007 VC191	NEODyS	1959	2012-2090	66	8.02e-09	-5.79	-6.46	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2007/11/14.313 to 2007/11/15.352."

2007 VB191	NEODyS	1631	2088	1	4.44e-09	-8.62	-8.62	0	NEODyS: "Based on 11 optical observations (of which 1 are rejected as outliers) from 2007/11/14.266 to 2007/11/16.348."

2007 VK184	NEODyS	1436	2041-2068	30	7.61e-05	-2.53	-2.82	0	NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/11/16.909."
2007 VK184	JPL Sentry	1435	2035-2062	25	7.9e-05	-2.52	-2.81	0	JPL: "Analysis based on 49 observations spanning 4.7697 days (2007-Nov-12.13904 to 2007-Nov-16.90871)." Diameter approximately 0.140 km. from mean, weighted H=22.0.

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 17 November '07

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

2234	Grabbed MPEC 2007-W12 - 2007 VL243 - see above Grabbed MPEC 2007-W13 - 2007 VM243 - see above Grabbed MPEC 2007-W14 - 2007 VN243 - see above Grabbed MPEC 2007-W15 - 2007 VO243 - see above Grabbed MPEC 2007-W16 - 2007 VP243 - see above Grabbed MPEC 2007-W17 - 2007 WE - see above
1958	Noted that NEODyS has posted 2007 VC191 as an impact risk - see above
1631	Noted that NEODyS has posted 2007 VB191 as an impact risk - see above Noted that NEODyS has posted 2007 VE191 as an impact risk - see above Noted that NEODyS has posted 2007 WC as an impact risk - see above
1436	Noted that NEODyS has updated its 2007 VK184 risk assessment - see above Grabbed MPEC 2007-W11 - Daily Orbit Update - see above
1435	Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above Noted that JPL Sentry has removed 2007 WA as an impact risk - see above
0233	Noted that JPL Sentry has posted 2007 WC as an impact risk - see above

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