1 Nov '07 Tracking News

Contents on 1 November '07

IAU Minor Planet Center
- NEOCP Activity -- ten listings: 4 new, 6 updated
- New MPECs -- four MPECs
- Observers -- 21 observing facilities
Impact Risk Monitoring -- six objects reported
Chronology

Resources:

Consolidated Risk Tables - CRT page
Old & new CRT Archive
Ephemerides for risk-rated objects
Old News Archive & Small Objects Archive
Note: Due to travel, this Web site and its news pages will update less frequently and at sometimes irregular intervals during the rest of October and early November.

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 1 November '07

The MPC's NEO Confirmation Page has 10 listings: 4 new, 6 updated

When last checked at 2302 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of fourteen 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 1 November '07

Minor Planet Electronic Circulars

As of last check at 2302 UTC, there have been four MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-V01 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2007-V02 time-stamped "13:38 UT" - 2007 UQ51 - see below
MPEC 2007-V03 time-stamped "14:00 UT" - 2007 UR51 - see below
MPEC 2007-V04 time-stamped "14:06 UT" - 2007 US51

MPEC 2007-V04 - "14:06 UT" - 2007 US51

K07U51S 2007 US51 (risk-listed, Earth MOID=0.5 LD, H=27.2 ~12m) was discovered at 0913 UT on 31 Oct. by the Catalina Sky Survey (CSS), which observed it at Oct. 31.38-43p16. The discovery was confirmed by the Spacewatch 1.8m telescope (Nov. 1.40-41p3). This object is now within ten lunar distances (LD) of Earth, reaching 0.6 LD on 30 Oct. (INTRUDER).

MPEC 2007-V03 - "14:00 UT" - 2007 UR51

K07U51R 2007 UR51 (risk-listed, Earth MOID=4.9 LD, H=21.4 ~178m) was discovered at 0444 UT on 31 Oct. by LINEAR, which observed it at Oct. 31.20-25p5. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (Nov. 1.17p4), LONEOS (Nov. 1.20-23p4), Spacewatch 1.8m (Nov. 1.20-21p3), and Grasslands Obs. (Nov. 1.22-23p2).

MPEC 2007-V02 - "13:38 UT" - 2007 UQ51

K07U51Q 2007 UQ51 (H=20.3 ~295m) was discovered at 0308 UT on 31 Oct. by LINEAR, which observed it at Oct. 31.13-18p4. The discovery was confirmed by MLS (Nov. 1.07-09p4) and Grasslands Obs. (Nov. 1.21p3).

<< DOU on 1 Nov. '07 >> MPEC 2007-V01 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K07U12N 2007 UN12 (small asteroid, arc=10 days, H=28.7 ~6m) from Great Shefford Obs. (Oct. 31.01-04p3), the Spacewatch 0.9m telescope (Oct. 31.20-24p3), and Spacewatch 1.8m (Oct. 31.46-47p3)
K07U12L 2007 UL12 (q=0.385 AU, arc=6 days, H=20.6 ~257m) from Great Shefford Obs. (Oct. 31.06p2)
K07U01Y 2007 UY1 (small asteroid, arc=14 days, H=22.8 ~93m) from Spacewatch 1.8m (Nov. 1.11-12p3)
K07T72H 2007 TH72 (small asteroid, arc=13 days, H=24.2 ~49m) from Astronomical Research Obs. (ARO) (Oct. 28.16-19p3)
Observations of recently (no longer) risk-listed objects
K07T25A 2007 TA25 (arc=17 days, H=19.9 ~355m) from ARO (Oct. 28.08-10p3)
K07T23L 2007 TL23 (q=0.299 AU, arc=21 days, H=21.4 ~178m) from ARO (Oct. 30.06-09p3) and Spacewatch 1.8m (Nov. 1.12-13p3)
K07T23B 2007 TB23 (i=38.4°, arc=21 days, H=18.6 ~645m) from Eschenberg Obs. (Oct. 31.82p3)
K07T19H 2007 TH19 (arc=21 days, H=17.8 ~933m) from ARO (Oct. 29.21-24p3)
K07T15M 2007 TM15 (i=61.6°, arc=21 days, H=21.3 ~186m) from ARO (Oct. 28.00-01p3)
K07T01H 2007 TH1 (almost small, arc=26 days, H=22.0 ~135m) from Spacewatch 1.8m (Oct. 31.32-34p3)
K07S11R 2007 SR11 (almost small, Q=4.438 AU, arc=35 days, H=22.0 ~135m) from ARO (Oct. 28.22-24p3) and Spacewatch 1.8m (Oct. 31.35p2)
Observations of small asteroids (H>22.0)
K07U40K 2007 UK40 (arc=1 day, H=23.1 ~81m) from Farra d'Isonzo Obs. (Oct. 31.80-82p3), Guidestar Obs. (Oct. 31.84-87p3), and Great Shefford Obs. (Oct. 31.90p3)
K07U06P 2007 UP6 (arc=9 days, H=23.0 ~85m) from Eschenberg Obs. (Oct. 31.77-78p3)
K07U03S 2007 US3 (arc=11 days, H=22.3 ~117m) from ARO (Oct. 30.13-14p3)
K07T24X 2007 TX24 (arc=18 days, H=25.0 ~34m) from ARO (Oct. 29.25-27p3 at V=22.2)
K07T03H 2007 TH3 (arc=23 days, H=24.7 ~39m) from ARO (Oct. 29.02-03p2)
Observations of other objects
K07U12M 2007 UM12 (arc=4 days, H=21.6 ~162m) from ARO (Oct. 30.03p3)
K07U06B 2007 UB6 (arc=11 days, H=20.0 ~339m) from ARO (Oct. 30.19-21p6)
K07T65R 2007 TR65 (i=43.5°, arc=19 days, H=18.9 ~562m) from LINEAR (Oct. 31.20-23p4)
K07T25G 2007 TG25 (arc=22 days, H=18.8 ~589m) from CSS (Oct. 30.34-37p4) and MLS (Oct. 30.35-39p4)
K07T18Z 2007 TZ18 (arc=21 days, H=20.9 ~224m) from ARO (Oct. 29.34-35p3 & 30.30-31p3)
K07T15K 2007 TK15 (arc=22 days, H=21.2 ~195m) from ARO (Oct. 28.25-28p3)
K07T15G 2007 TG15 (arc=23 days, H=19.6 ~407m) from Thompsonville Obs. (Oct. 31.17-18p5)
K07T08K 2007 TK8 (arc=25 days, H=21.1 ~204m) from Spacewatch 0.9m (Oct. 31.08-12p3) and Pla D'Arguines Obs. (Oct. 31.98-99p5)
K07T08G 2007 TG8 (Q=4.306 AU, arc=48 days, H=18.7 ~616m) from Thompsonville Obs. (Oct. 31.09p5)
K07S02W 2007 SW2 (arc=40 days, H=21.3 ~186m) from ARO (Oct. 30.01-02p3)
K07S01R 2007 SR1 (arc=42 days, H=19.7 ~389m) from ARO (Oct. 30.04-05p3)
K07RE7T 2007 RT147 (arc=47 days, H=18.2 ~776m) from ARO (Oct. 29.07-09p3)
K07RD3L 2007 RL133 (arc=45 days, H=20.3 ~295m) from ARO (Oct. 29.10-11p3)
K07R19X 2007 RX19 (i=40.4°, arc=45 days, H=18.5 ~676m) from ARO (Oct. 29.01p3)
K07R19T 2007 RT19 (arc=2 opp, H=18.3 ~741m) from ARO (Oct. 30.23-24p3)
K07R17U 2007 RU17 (q=0.356 AU, arc=48 days, H=18.2 ~776m) from LINEAR (Oct. 31.19-22p3)
K07Q02A 2007 QA2 (arc=73 days, H=20.7 ~245m) from ARO (Oct. 29.04-05p2)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Hamamatsu-Yuto Obs. (Oct. 27.59-60p2, 29.58p2 & 31.56-57p5), Malaga Obs. (Oct. 30.06-07p8), and Thompsonville Obs. (Oct. 31.20-21p5)
K07P08E 2007 PE8 (arc=167 days, H=19.4 ~446m) from ARO (Oct. 29.04-05p3)
K07O00Y 2007 OY (arc=103 days, H=20.9 ~224m) from ARO (Oct. 29.12-13p3)
K07O00V 2007 OV (arc=104 days, H=19.3 ~467m) from ARO (Oct. 29.06-09p3)
K07M06L 2007 ML6 (arc=130 days, H=18.6 ~645m) from the Siding Spring Survey (SSS) (Oct. 29.59-63p4)
K07L32R 2007 LR32 (arc=159 days, H=17.2 ~1.23 km) from Thompsonville Obs. (Oct. 31.11p5) and Highworth Obs. (Oct. 31.85-89p3)
K07L19Q 2007 LQ19 (Q=4.247 AU, arc=138 days, H=17.4 ~1.12 km) from ARO (Oct. 29.28-29p3)
K06W01W 2006 WW1 (arc=4 opp, H=19.1 ~513m) from David Tholen's team on Mauna Kea (2005 Oct. 5.23p2)
K04K01E 2004 KE1 (arc=2 opp, H=21.6 ~162m) from LONEOS (Oct. 17.16-23p4) and CSS (Oct. 31.20-22p4)
K03W07M 2003 WM7 (q=0.304 AU, Q=4.668 AU, arc=3 opp, H=17.4 ~1.12 km) from Spacewatch 0.9m (Oct. 30.30-34p3)
K02U31A 2002 UA31 (arc=4 opp, H=19.0 ~537m) from CSS (Oct. 31.10-12p3)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from Hamamatsu-Yuto Obs. (Oct. 27.55-58p7 & 31.52-54p9) and CSS (Oct. 31.27-29p4)
K02A29C 2002 AC29 (arc=4 opp, H=17.7 ~977m) from ARO (Oct. 30.26-28p3)
K00M01U 2000 MU1 (arc=4 opp, H=19.8 ~371m) from ARO (Oct. 29.31-33p3)
J90S00M 1990 SM (arc=4 opp, H=16.2 ~1.95 km) from ARO (Oct. 28.35-39p3 at V=22.1)
G2215 162215 1999 TL12 from CSS (Oct. 31.30-35p4)
G2142 162142 1998 VR from CSS (Oct. 31.30-35p4)
F9495 159495 2000 UV16 from LINEAR (Oct. 31.08-12p4)
F3591 153591 2001 SN263 from Atlante Obs. (Oct. 31.94-98p3)
E5656 145656 4788 P-L from LINEAR (Oct. 31.13-18p5)
E3651 143651 2003 QO104 from Spacewatch 0.9m (Oct. 30.41-45p3)
E1874 141874 2002 PO34 from Montana Blanca Obs. (Oct. 31.85p1)
90373 90373 2003 SZ219 from MLS (Oct. 31.10-11p4)
08034 8034 Akka (1992 LR) from Spacewatch 0.9m (Oct. 30.36-40p3)
06489 6489 Golevka (1991 JX) from Spacewatch 0.9m (Oct. 31.09-13p3)
04486 4486 Mithra (1987 SB) from Spacewatch 0.9m (Oct. 30.20-23p3)
03671 3671 Dionysus (1984 KD) from CSS (Oct. 30.42-45p4)
02212 2212 Hephaistos (1978 SB) from CSS (Oct. 30.24-26p4)

Observers on 1 November '07

A total of 21 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 27 in MPEC 2007-V01 -- 2007 US3, 2007 UM12, 2007 UB6, 2007 TZ18, 2007 TX24, 2007 TM15, 2007 TL23, 2007 TK15, 2007 TH72, 2007 TH3, 2007 TH19, 2007 TA25, 2007 SW2, 2007 SR11, 2007 SR1, 2007 RX19, 2007 RT19, 2007 RT147, 2007 RL133, 2007 QA2, 2007 PE8, 2007 OY, 2007 OV, 2007 LQ19, 2002 AC29, 2000 MU1, 1990 SM
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2007-V01 -- 153591
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2007-V01 & 2007-V04 -- 2007 US51, 2007 TG25, 2004 KE1, 2002 UA31, 2002 RC118, 162215, 162142, 3671, 2212
`151`	Eschenberg Obs. in Switzerland, 2 in MPEC 2007-V01 -- 2007 UP6, 2007 TB23
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-V01 -- 2007 UK40
`651`	Grasslands Obs. in Arizona, 2 in MPECs 2007-V02 & 2007-V03 -- 2007 UR51, 2007 UQ51
`J95`	Great Shefford Obs. in England, 3 in MPEC 2007-V01 -- 2007 UN12, 2007 UL12, 2007 UK40
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2007-V01 -- 2007 UK40
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-V01 -- 2007 PU11, 2002 RC118
`951`	Highworth Obs. in England, 1 in MPEC 2007-V01 -- 2007 LR32
`704`	LINEAR in New Mexico, 6 in MPECs 2007-V01, 2007-V02 & 2007-V03 -- 2007 UR51, 2007 UQ51, 2007 TR65, 2007 RU17, 159495, 145656
`699`	LONEOS in Arizona, 2 in MPECs 2007-V01 & 2007-V03 -- 2007 UR51, 2004 KE1
`J40`	Malaga Obs. in Spain, 1 in MPEC 2007-V01 -- 2007 PU11
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2007-V01 -- 2006 WW1
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-V01 -- 141874
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2007-V01, 2007-V02 & 2007-V03 -- 2007 UR51, 2007 UQ51, 2007 TG25, 90373
`941`	Pla D'Arguines Obs. in Spain, 1 in MPEC 2007-V01 -- 2007 TK8
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2007-V01 -- 2007 ML6
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2007-V01 -- 2007 UN12, 2007 TK8, 2003 WM7, 143651, 8034, 6489, 4486
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2007-V01, 2007-V03 & 2007-V04 -- 2007 UY1, 2007 US51, 2007 UR51, 2007 UN12, 2007 TL23, 2007 TH1, 2007 SR11
`H53`	Thompsonville Obs., 4 in MPEC 2007-V01 -- 2007 TG8, 2007 TG15, 2007 PU11, 2007 LR32

Impact Risk Monitoring on 1 November '07

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2302 and JPL at 2303 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 US51	JPL Sentry	1859	2070-2106	11	3.6e-06	-6.65	-7.21	0	JPL: "Analysis based on 19 observations spanning 1.0238 days (2007-Oct-31.38411 to 2007-Nov-01.40792)." Diameter approximately 0.012 km. from mean, weighted H=27.2.

2007 UR51	JPL Sentry	1859	2016-2107	68	1.7e-07	-4.75	-5.76	0	JPL: "Analysis based on 18 observations spanning 1.0361 days (2007-Oct-31.19738 to 2007-Nov-01.23351)." Diameter approximately 0.192 km. from mean, weighted H=21.2.

2007 UN12	NEODyS	1258	2069-2090	25	7.44e-05	-6.36	-7.15	0	NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2007/10/21.373 to 2007/10/31.474."
2007 UN12	JPL Sentry	1257	2075-2107	24	2.1e-04	-5.98	-6.86	0	JPL: "Analysis based on 75 observations spanning 10.100 days (2007-Oct-21.37247 to 2007-Oct-31.47294)." Diameter approximately 0.006 km. from mean, weighted H=28.8.

2007 UL12	JPL Sentry	1257	2094	1	5.4e-09	-5.95	-5.95	0	JPL: "Analysis based on 33 observations spanning 5.5879 days (2007-Oct-25.47694 to 2007-Oct-31.06479)." Diameter approximately 0.260 km. from mean, weighted H=20.5.

2007 UY1	JPL Sentry	1257	2097-2104	3	6.5e-08	-6.58	-6.87	0	JPL: "Analysis based on 46 observations spanning 13.973 days (2007-Oct-18.14415 to 2007-Nov-01.11698)." Diameter approximately 0.093 km. from mean, weighted H=22.8.

2007 TH72	NEODyS	1258	2087	1	1.84e-09	-8.43	-8.43	0	NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2007/10/12.211 to 2007/10/28.219."
2007 TH72	JPL Sentry	1257	2102	1	6.7e-10	-8.94	-8.94	0	JPL: "Analysis based on 38 observations spanning 13.015 days (2007-Oct-15.20289 to 2007-Oct-28.21824)." Diameter approximately 0.047 km. from mean, weighted H=24.3.

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 1 November '07

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

1859	Noted that JPL Sentry has posted 2007 UR51 as an impact risk - see above Noted that JPL Sentry has posted 2007 US51 as an impact risk - see above
1519	Grabbed MPEC 2007-V04 - 2007 US51 - see above
1405	Grabbed MPEC 2007-V02 - 2007 UQ51 - see above Grabbed MPEC 2007-V03 - 2007 UR51 - see above
1258	Noted that NEODyS has updated its 2007 TH72 risk assessment - see above Noted that NEODyS has updated its 2007 UN12 risk assessment - see above Grabbed MPEC 2007-V01 - Daily Orbit Update - see above
1257	Noted that JPL Sentry has reposted 2007 TH72 as an impact risk - see above Noted that JPL Sentry has updated its 2007 UL12 risk assessment - see above Noted that JPL Sentry has updated its 2007 UN12 risk assessment - see above Noted that JPL Sentry has updated its 2007 UY1 risk assessment - see above

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