25 Oct '07 Tracking News

Contents on 25 October '07

IAU Minor Planet Center
- NEOCP Activity -- three listings: 3 updated
- New MPECs -- one MPEC
- Observers -- nineteen observing facilities
Impact Risk Monitoring -- three objects reported
Chronology

Resources:

Consolidated Risk Tables - CRT page
Old & new CRT Archive
Ephemerides for risk-rated objects
Old News Archive & Small Objects Archive
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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 25 October '07

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." The Tracking News counted a total of seven objects listed on the NEOCP at some point on this day.

New MPECs on 25 October '07

Minor Planet Electronic Circulars

There was one MPEC issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 25 Oct. '07 >> MPEC 2007-U71 - "06:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K07U01W 2007 UW1 (small asteroid, arc=7 days, H=22.7 ~98m) from the Mt. Lemmon Survey (MLS) (Oct. 24.52p4)
K07T71D 2007 TD71 from the Siding Spring Survey (SSS) (Oct. 22.69-71p18)
K07T14C 2007 TC14 from Lumijoki Obs. (Oct. 13.86p3)
Observations of recently (no longer) risk-listed objects
K07U00H 2007 UH (small asteroid, arc=13 days, H=22.1 ~129m) from the Spacewatch 0.9m telescope (Oct. 11.34-38p3), Astronomical Research Obs. (ARO) (Oct. 22.33p1), and Desert Moon Obs. (Oct. 24.21-23p3)
K07T66E 2007 TE66 (arc=12 days, H=21.2 ~195m) from Desert Moon Obs. (Oct. 24.26-28p3) and MLS (Oct. 24.32-33p3)
K07T25A 2007 TA25 from the Spacewatch 1.8m telescope (Oct. 20.24-25p3)
K07T23L 2007 TL23 from MLS (Oct. 20.24-26p4)
K07T23C 2007 TC23 from ARO (Oct. 22.43p2)
K07T23B 2007 TB23 from MLS (Oct. 20.35-37p4), Desert Moon Obs. (Oct. 23.32-34p3), and Shenton Park Obs. (Oct. 23.75p2)
K07T19H 2007 TH19 from Spacewatch 1.8m (Oct. 20.28p3) and Spacewatch 0.9m (Oct. 20.32-36p3 at V=22.1)
K07T18X 2007 TX18 (arc=15 days, H=17.4 ~1.12 km) from Desert Moon Obs. (Oct. 24.31-34p3)
K07T01H 2007 TH1 (almost small, arc=19 days, H=22.0 ~135m) from Desert Moon Obs. (Oct. 23.25-29p3) and MLS (Oct. 24.22-23p4)
Observations of small asteroids (H>22.0)
K07U06P 2007 UP6 (arc=2 days, H=22.6 ~102m) from LINEAR (Oct. 23.39-42p4 & 24.37-42p10) and Jim Young via Table Mtn. Obs. (Oct. 24.37-38p4)
K07U06G 2007 UG6 (arc=4 days, H=22.9 ~89m) from Great Shefford Obs. (Oct. 23.99-00p3), MLS (Oct. 24.22-24p4), and Greiner Research Obs. (Oct. 25.14-15p4)
K07U03S 2007 US3 (arc=5 days, H=22.3 ~117m) from MLS (Oct. 24.22-24p4)
K07T68V 2007 TV68 (Q=4.081 AU, arc=11 days, H=23.0 ~85m) from MLS (Oct. 24.30-31p4)
K07R19Z 2007 RZ19 (arc=27 days, H=22.2 ~123m) from ARO (Oct. 22.27-28p3)
Observations of other objects
K07U06S 2007 US6 (arc=2 days, H=18.2 ~776m) from LINEAR (Oct. 23.26-31p5)
K07U06B 2007 UB6 (arc=5 days, H=20.2 ~309m) from MLS (Oct. 24.32-34p4)
K07U03W 2007 UW3 from LINEAR (Oct. 23.37-40p4)
K07U03V 2007 UV3 (q=0.285 AU, arc=5 days, H=19.3 ~467m) from ARO (Oct. 22.35p3), LINEAR (Oct. 23.31-35p5), Desert Moon Obs. (Oct. 23.48-49p2), Shenton Park Obs. (Oct. 23.78-79p3), and MLS (Oct. 24.32-34p2)
K07U03U 2007 UU3 from ARO (Oct. 22.41p3)
K07U03R 2007 UR3 from Spacewatch 0.9m (Oct. 23.19-22p3)
K07U01X 2007 UX1 (arc=7 days, H=20.5 ~269m) from ARO (Oct. 22.39p1) and Desert Moon Obs. (Oct. 24.37-41p3)
K07U00T 2007 UT (i=45.6°, arc=7 days, H=21.5 ~170m) from Gnosca Obs. (Oct. 22.89-91p3) and MLS (Oct. 24.22-24p4)
K07T74O 2007 TO74 from Spacewatch 0.9m (Oct. 23.20-23p3)
K07T68W 2007 TW68 from Spacewatch 0.9m (Oct. 21.26-29p3) and ARO (Oct. 22.32-33p3)
K07T25G 2007 TG25 from Spacewatch 0.9m (Oct. 20.25-29p3)
K07T24V 2007 TV24 from the Catalina Sky Survey (CSS) (Oct. 20.33-36p4), Spacewatch 0.9m (Oct. 21.42-46p3), and Desert Moon Obs. (Oct. 23.36-38p3)
K07T24R 2007 TR24 (arc=14 days, H=20.4 ~282m) from Andrushivka Obs. (Oct. 9.85-86p2), Desert Moon Obs. (Oct. 24.16-18p3), and MLS (Oct. 24.22-23p4)
K07T19S 2007 TS19 (arc=15 days, H=20.7 ~245m) from MLS (Oct. 24.17-20p16) and Greiner Research Obs. (Oct. 25.12p8)
K07T18Y 2007 TY18 (arc=2 opp, H=18.6 ~645m) from MLS (Oct. 24.32-34p4)
K07T15K 2007 TK15 from Spacewatch 0.9m (Oct. 20.32-35p3)
K07T15G 2007 TG15 from LINEAR (Oct. 23.25-30p5)
K07T14D 2007 TD14 (arc=2 opp, H=18.8 ~589m) from MLS (Oct. 24.30-31p4)
K07T08K 2007 TK8 (arc=14 days, H=21.1 ~204m) from LINEAR (Oct. 20.26-29p3)
K07T08G 2007 TG8 (Q=4.307 AU, arc=41 days, H=18.8 ~589m) from MLS (Oct. 24.20-21p4)
K07S11E 2007 SE11 (i=48.3°, arc=34 days, H=17.6 ~1.02 km) from LONEOS (Oct. 20.39-44p4) and Desert Moon Obs. (Oct. 24.44p3)
K07S01S 2007 SS1 from ARO (Oct. 22.33-34p4)
K07RD3Q 2007 RQ133 from Spacewatch 0.9m (Oct. 19.23-27p3)
K07R20D 2007 RD20 (arc=40 days, H=20.9 ~224m) from MLS (Oct. 24.36-39p4)
K07R12U 2007 RU12 (arc=42 days, H=19.9 ~355m) from LONEOS (Oct. 19.26-34p4) and MLS (Oct. 24.30-31p4)
K07R10U 2007 RU10 (arc=43 days, H=19.1 ~513m) from Desert Moon Obs. (Oct. 23.14p1 & 24.10p1)
K07R05F 2007 RF5 from Hadano Obs. (Oct. 8.61p7)
K07P11U 2007 PU11 from Hadano Obs. (Oct. 8.62-63p7) and Malaga Obs. (Oct. 21.02-03p3)
K07L32R 2007 LR32 (arc=153 days, H=17.2 ~1.23 km) from Hadano Obs. (Oct. 8.52-53p4 & 10.59-60p3) and Greiner Research Obs. (Oct. 25.13p5)
K06R01J 2006 RJ1 from Spacewatch 0.9m (Oct. 21.43-46p3)
K04V00V 2004 VV (i=52.4°, arc=3 opp, H=17.3 ~1.17 km) from LINEAR (Oct. 24.08-10p3)
K03U10B 2003 UB10 (arc=4 opp, H=18.3 ~741m) from MLS (Oct. 24.28-29p4 & 24.35-36p4)
K02X14R 2002 XR14 from Spacewatch 0.9m (Oct. 20.41-44p2)
K02U03R 2002 UR3 (i=48.6°, q=0.285 AU, arc=5 opp, H=16.4 ~1.78 km) from LINEAR (Oct. 24.37-42p5)
K01Q34C 2001 QC34 from Bisei Spaceguard Center (Bisei) (Oct. 6.52p4)
G3051 163051 2001 YJ4 from Spacewatch 0.9m (Oct. 21.38-41p3)
G2273 162273 1999 VL12 from LINEAR (Oct. 24.31-35p4)
G2173 162173 1999 JU3 from Bisei (Oct. 6.52-53p6)
F3591 153591 2001 SN263 from LINEAR (Oct. 24.32-36p4)
E3678 143678 2003 SA224 from LINEAR (Oct. 23.26-31p5 & 24.26-31p5)
D6795 136795 1997 BQ from Spacewatch 0.9m (Oct. 23.20-23p3)
A5140 105140 2000 NL10 from LINEAR (Oct. 23.13-17p4)
85628 85628 1998 KV2 from Spacewatch 0.9m (Oct. 20.47-48p2)
68063 68063 2000 YJ66 from LINEAR (Oct. 24.43-47p5)
18736 18736 1998 NU from LINEAR (Oct. 24.31-35p4)
16636 16636 1993 QP from LINEAR (Oct. 23.22-24p3)
11500 11500 1989 UR from LINEAR (Oct. 23.32-37p5)
08176 8176 1991 WA from LINEAR (Oct. 24.45-47p3)
04954 4954 Eric (1990 SQ) from LINEAR (Oct. 24.07-12p5)
03553 3553 Mera (1985 JA) from LINEAR (Oct. 24.31-35p5)
03200 3200 Phaethon (1983 TB) from LINEAR (Oct. 23.38-42p5)
01862 1862 Apollo (1932 HA) from LINEAR (Oct. 23.45-48p4)

Observers on 25 October '07

Nineteen observing facilities appeared in this day's MPEC.

Code	Observer / observatory
`A50`	Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-U71 -- 2007 TR24
`H55`	Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2007-U71 -- 2007 UX1, 2007 UV3, 2007 UU3, 2007 UH, 2007 TW68, 2007 TC23, 2007 SS1, 2007 RZ19
`300`	Bisei Spaceguard Center (Bisei) in Japan, 2 in MPEC 2007-U71 -- 2001 QC34, 162173
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2007-U71 -- 2007 TV24
`448`	Desert Moon Obs. in New Mexico, 11 in MPEC 2007-U71 -- 2007 UX1, 2007 UV3, 2007 UH, 2007 TX18, 2007 TV24, 2007 TR24, 2007 TH1, 2007 TE66, 2007 TB23, 2007 SE11, 2007 RU10
`143`	Gnosca Obs. in Switzerland, 1 in MPEC 2007-U71 -- 2007 UT
`J95`	Great Shefford Obs. in England, 1 in MPEC 2007-U71 -- 2007 UG6
`H51`	Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-U71 -- 2007 UG6, 2007 TS19, 2007 LR32
`355`	Hadano Obs. in Japan, 3 in MPEC 2007-U71 -- 2007 RF5, 2007 PU11, 2007 LR32
`704`	LINEAR in New Mexico, 21 in MPEC 2007-U71 -- 2007 UW3, 2007 UV3, 2007 US6, 2007 UP6, 2007 TK8, 2007 TG15, 2004 VV, 2002 UR3, 68063, 18736, 16636, 162273, 153591, 143678, 11500, 105140, 8176, 4954, 3553, 3200, 1862
`699`	LONEOS in Arizona, 2 in MPEC 2007-U71 -- 2007 SE11, 2007 RU12
`A70`	Lumijoki Obs. in Finland, 1 in MPEC 2007-U71 -- 2007 TC14
`J40`	Malaga Obs. in Spain, 1 in MPEC 2007-U71 -- 2007 PU11
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 19 in MPEC 2007-U71 -- 2007 UW1, 2007 UV3, 2007 UT, 2007 US3, 2007 UG6, 2007 UB6, 2007 TY18, 2007 TV68, 2007 TS19, 2007 TR24, 2007 TL23, 2007 TH1, 2007 TG8, 2007 TE66, 2007 TD14, 2007 TB23, 2007 RU12, 2007 RD20, 2003 UB10
`D21`	Shenton Park Obs. in Western Australia, 2 in MPEC 2007-U71 -- 2007 UV3, 2007 TB23
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2007-U71 -- 2007 TD71
`691`	Spacewatch 0.9m telescope in Arizona, 14 in MPEC 2007-U71 -- 2007 UR3, 2007 UH, 2007 TW68, 2007 TV24, 2007 TO74, 2007 TK15, 2007 TH19, 2007 TG25, 2007 RQ133, 2006 RJ1, 2002 XR14, 85628, 163051, 136795
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-U71 -- 2007 TH19, 2007 TA25
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-U71 -- 2007 UP6

Impact Risk Monitoring on 25 October '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 UW1	NEODyS	1658	2048-2090	51	4.67e-05	-3.57	-4.23	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2007/10/17.443 to 2007/10/24.524."
2007 UW1	JPL Sentry	1252	2048-2107	90	7.6e-05	-3.38	-4.25	0	JPL: "Analysis based on 32 observations spanning 7.0807 days (2007-Oct-17.44246 to 2007-Oct-24.52312)." Diameter approximately 0.099 km. from mean, weighted H=22.7.

2007 TD71	NEODyS	1436	2066-2081	10	7.35e-08	-3.65	-3.89	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2007/10/13.703 to 2007/10/22.713."
2007 TD71	JPL Sentry	1252	2066-2081	6	6.0e-08	-3.74	-3.96	0	JPL: "Analysis based on 39 observations spanning 9.0102 days (2007-Oct-13.70201 to 2007-Oct-22.71222)." Diameter approximately 0.720 km. from mean, weighted H=18.4.

2007 TC14	NEODyS	1658	2082	1	1.24e-07	-5.33	-5.33	0	NEODyS: "Based on 137 optical observations (of which 0 are rejected as outliers) from 2007/10/08.391 to 2007/10/16.872."
2007 TC14	JPL Sentry	1402	2082	1	1.2e-07	-5.35	-5.35	0	JPL: "Analysis based on 137 observations spanning 8.4810 days (2007-Oct-08.39044 to 2007-Oct-16.87145)." Diameter approximately 0.130 km. from mean, weighted H=22.1.

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 25 October '07

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

1658	Noted that NEODyS has updated its 2007 TC14 risk assessment - see above Noted that NEODyS has updated its 2007 UW1 risk assessment - see above
1436	Noted that NEODyS has updated its 2007 TD71 risk assessment - see above
1402	Noted that JPL Sentry has reposted 2007 TC14 as an impact risk - see above
1252	Noted that JPL Sentry has updated its 2007 TD71 risk assessment - see above Noted that JPL Sentry has updated its 2007 UW1 risk assessment - see above Grabbed MPEC 2007-U71 - Daily Orbit Update - see above

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