18 Nov '07 Tracking News

Contents on 18 November '07

IAU Minor Planet Center
- NEOCP Activity -- 21 listings: 6 new, 15 updated
- New MPECs -- one MPEC
- Observers -- seventeen observing facilities
Impact Risk Monitoring -- five objects reported
Chronology

Resources:

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

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 18 November '07

The MPC's NEO Confirmation Page has 21 listings: 6 new, 15 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and fifteen updated listings. Of these, fourteen were "one nighters."

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 18 November '07

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 18 Nov. '07 >> MPEC 2007-W18 - "07:15 UT" - Daily Orbit Update

Observations of risk-listed objects
K07VJ1B 2007 VB191 (small asteroid, arc=4 days, H=25.5 ~27m) from Jim Young via Table Mtn. Obs. (Nov. 18.25-26p4)
K07VI9G 2007 VG189 (arc=3 days, H=18.8 ~589m) from Astronomical Research Obs. (ARO) (Nov. 16.28-29p2)
K07VD7W 2007 VW137 (arc=9 days, H=18.3 ~741m) from the Mt. Lemmon Survey (MLS) (Nov. 15.27-29p4) and the Spacewatch 1.8m telescope (Nov. 17.40-41p3)
Observations of recently (no longer) risk-listed objects
K07V85A 2007 VA85 (i=132.5°, Q=7.029 AU, arc=13 days, H=15.1 ~3.23 km, q=1.098 AU) from Suno Obs. (Nov. 16.88p3)
K07V12D 2007 VD12 (arc=12 days, H=20.1 ~323m) from Hamamatsu-Yuto Obs. (Nov. 17.64-67p7)
K07T23B 2007 TB23 (i=38.3°, arc=38 days, H=18.7 ~616m) from LINEAR (Nov. 17.19-24p5) and Thompsonville Obs. (Nov. 17.24-25p6)
Observations of small asteroids (H>22.0)
K07VI4L 2007 VL184 (arc=6 days, H=24.1 ~51m) from Young/Table Mtn. (Nov. 18.12-15p5)
K07V07W 2007 VW7 (arc=13 days, H=25.1 ~32m) from Mt. John Obs. (Nov. 17.57-58p3)
K07T01G 2007 TG1 (arc=44 days, H=24.4 ~45m) from Spacewatch 1.8m (Nov. 17.43-44p2)
Observations of other objects
K07VO3O 2007 VO243 (arc=2 days, H=19.3 ~467m) from program code {!} via U.S. Naval Obs. Flagstaff Station (Nov. 17.31p3) and Naef Obs. (Nov. 18.01-02p2)
K07VI8A 2007 VA188 (Q=5.693 AU, arc=6 days, H=19.4 ~446m) from Young/Table Mtn. (Nov. 18.09-10p3)
K07VI6H 2007 VH186 (arc=6 days, H=20.1 ~323m) from Mt. John Obs. (Nov. 17.52-53p3)
K07VI4J 2007 VJ184 (arc=6 days, H=21.2 ~195m) from Young/Table Mtn. (Nov. 18.07-08p4)
K07VD7X 2007 VX137 (arc=9 days, H=18.5 ~676m) from LINEAR (Nov. 17.32-37p4)
K07V04Q 2007 VQ4 (Q=4.011 AU, arc=13 days, H=16.0 ~2.14 km, q=1.272 AU) from LONEOS (Nov. 15.39-44p3)
K07U65S 2007 US65 (Q=4.049 AU, arc=18 days, H=19.8 ~371m) from MLS (Nov. 17.21-23p4)
K07U51Q 2007 UQ51 (arc=17 days, H=20.2 ~309m) from MLS (Nov. 17.08-10p4)
K07U13Q 2007 UQ13 (arc=18 days, H=19.7 ~389m) from Mt. John Obs. (Nov. 17.50-51p4)
K07U12M 2007 UM12 (arc=22 days, H=21.6 ~162m) from Mt. John Obs. (Nov. 17.48-49p3)
K07U06S 2007 US6 (arc=34 days, H=18.3 ~741m) from Thompsonville Obs. (Nov. 17.22-23p6)
K07U06B 2007 UB6 (arc=29 days, H=19.7 ~389m) from LONEOS (Nov. 15.25-32p4) and the Catalina Sky Survey (CSS) (Nov. 17.32-34p4)
K07U03R 2007 UR3 (arc=39 days, H=21.3 ~186m) from Spacewatch 1.8m (Nov. 17.14p2)
K07T18X 2007 TX18 (arc=39 days, H=17.2 ~1.23 km) from MLS (Nov. 15.27-28p4, 15.33-35p4, 16.15-16p8 & 17.23-25p4)
K07T15G 2007 TG15 (arc=40 days, H=19.6 ~407m) from Thompsonville Obs. (Nov. 17.20-21p6)
K07S11E 2007 SE11 (i=48.3°, arc=58 days, H=17.8 ~933m) from Thompsonville Obs. (Nov. 17.28-29p6) and Hamamatsu-Yuto Obs. (Nov. 17.56-58p5)
K07R12U 2007 RU12 (arc=66 days, H=20.0 ~339m) from Thompsonville Obs. (Nov. 17.26-27p6) and CSS (Nov. 17.32-35p4)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Thompsonville Obs. (Nov. 17.28p6) and Hamamatsu-Yuto Obs. (Nov. 17.60-61p3)
K07L32R 2007 LR32 (arc=176 days, H=17.2 ~1.23 km) from Northbrook Meadow Obs. (Oct. 29.04p1, 29.14p1, Nov. 1.17p1 & 1.27p1) and Thompsonville Obs. (Nov. 17.19-20p6)
K02U03O 2002 UO3 (Q=5.335 AU, arc=3 opp, H=17.7 ~977m) from CSS (Nov. 15.18-19p4)
K01J01M 2001 JM1 (arc=4 opp, H=19.0 ~537m) from Spacewatch 1.8m (Nov. 17.46-48p3)
J97E30T 1997 ET30 (arc=8 opp, H=16.9 ~1.41 km) from the Spacewatch 0.9m telescope (Nov. 17.13-16p3)
G2142 162142 1998 VR from San Benedetto Po Obs. (Nov. 15.87p3) and Hamamatsu-Yuto Obs. (Nov. 17.51-52p3)
G2004 162004 1991 VE from Andrew Lowe via RAS Obs. Mayhill (Nov. 15.32-34p3)
G1998 161998 1988 PA from CSS (Nov. 17.22-25p4)
F2787 152787 1999 TB10 from CSS (Nov. 17.14-17p4)
D8971 138971 2001 CB21 from LINEAR (Nov. 17.07-12p4)
D6617 136617 1994 CC from MLS (Nov. 17.34-36p4)
99907 99907 1989 VA from CSS (Nov. 17.11-12p4)
53426 53426 1999 SL5 from CSS (Nov. 17.14-17p4)
18736 18736 1998 NU from MLS (Nov. 17.34-36p3)
16636 16636 1993 QP from CSS (Nov. 17.13-17p4)
03671 3671 Dionysus (1984 KD) from MLS (Nov. 17.31-33p7)
03553 3553 Mera (1985 JA) from LINEAR (Nov. 17.25-30p5)
02340 2340 Hathor (1976 UA) from CSS (Nov. 17.07-10p4)
02201 2201 Oljato (1947 XC) from MLS (Nov. 17.08-10p4 at V=22.1)
01580 1580 Betulia (1950 KA) from LINEAR (Nov. 17.32-37p9)

Observers on 18 November '07

Seventeen observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-W18 -- 2007 VG189
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2007-W18 -- 2007 UB6, 2007 RU12, 2002 UO3, 99907, 53426, 16636, 161998, 152787, 2340
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-W18 -- 2007 VD12, 2007 SE11, 2007 PU11, 162142
`704`	LINEAR in New Mexico, 5 in MPEC 2007-W18 -- 2007 VX137, 2007 TB23, 138971, 3553, 1580
`699`	LONEOS in Arizona, 2 in MPEC 2007-W18 -- 2007 VQ4, 2007 UB6
`474`	Mt. John Obs. in New Zealand, 4 in MPEC 2007-W18 -- 2007 VW7, 2007 VH186, 2007 UQ13, 2007 UM12
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2007-W18 -- 2007 VW137, 2007 US65, 2007 UQ51, 2007 TX18, 18736, 136617, 3671, 2201
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2007-W18 -- 2007 VO243
`H56`	Northbrook Meadow Obs., 1 in MPEC 2007-W18 -- 2007 LR32
`H066`	Andrew Lowe in Alberta via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-W18 -- 162004
`434`	San Benedetto Po Obs. in Italy, 1 in MPEC 2007-W18 -- 162142
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2007-W18 -- 1997 ET30
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2007-W18 -- 2007 VW137, 2007 UR3, 2007 TG1, 2001 JM1
`147`	Suno Obs. in Italy, 1 in MPEC 2007-W18 -- 2007 VA85
`6735`	Jim Young via Table Mtn. Obs. in southern California, 4 in MPEC 2007-W18 -- 2007 VL184, 2007 VJ184, 2007 VB191, 2007 VA188
`H53`	Thompsonville Obs., 7 in MPEC 2007-W18 -- 2007 US6, 2007 TG15, 2007 TB23, 2007 SE11, 2007 RU12, 2007 PU11, 2007 LR32
`689!`	program code {!} via U.S. Naval Obs. Flagstaff Station in Arizona, 1 in MPEC 2007-W18 -- 2007 VO243

Impact Risk Monitoring on 18 November '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2355 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 VP243	NEODyS	1443	2026-2085	9	1.21e-08	-6.00	-6.44	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2007/11/15.266 to 2007/11/17.247."
2007 VP243	JPL Sentry	0534	2026-2102	16	1.9e-08	-5.84	-6.55	0	JPL: "Analysis based on 14 observations spanning 1.9806 days (2007-Nov-15.26549 to 2007-Nov-17.24613)." Diameter approximately 0.184 km. from mean, weighted H=21.3.

2007 VN243	NEODyS	1443	2035-2086	21	1.54e-06	-4.51	-4.81	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2007/11/15.245 to 2007/11/17.329."
2007 VN243	JPL Sentry	0534	2030-2045	7	1.0e-07	-5.46	-5.77	0	JPL: "Analysis based on 15 observations spanning 2.0849 days (2007-Nov-15.24381 to 2007-Nov-17.32867)." Diameter approximately 0.110 km. from mean, weighted H=22.4.

2007 VB191	NEODyS	1442	R E M O V E D

2007 VG189	JPL Sentry	1443	2012-2106	16	4.8e-09	-4.49	-4.64	0	JPL: "Analysis based on 11 observations spanning 2.8701 days (2007-Nov-13.42445 to 2007-Nov-16.294557)." Diameter approximately 0.746 km. from mean, weighted H=18.3.
2007 VG189	NEODyS	1443	2012-2085	58	5.43e-08	-3.93	-4.31	0	NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2007/11/13.425 to 2007/11/16.295."

2007 VW137	NEODyS	1442	R E M O V E D

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 18 November '07

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

1444	Grabbed MPEC 2007-W18 - Daily Orbit Update - see above
1443	Noted that JPL Sentry has posted 2007 VG189 as an impact risk - see above Noted that NEODyS has updated its 2007 VG189 risk assessment - see above
1442	Noted that NEODyS has removed 2007 VB191 as an impact risk - see above Noted that NEODyS has posted 2007 VN243 as an impact risk - see above Noted that NEODyS has posted 2007 VP243 as an impact risk - see above Noted that NEODyS has removed 2007 VW137 as an impact risk - see above
0534	Noted that JPL Sentry has posted 2007 VN243 as an impact risk - see above Noted that JPL Sentry has posted 2007 VP243 as an impact risk - see above

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