13 Oct '07 Tracking News

Contents on 13 October '07

IAU Minor Planet Center
- NEOCP Activity -- 20 listings: 9 new, 11 updated
- New MPECs -- five MPECs
- Observers -- eighteen observing facilities
Impact Risk Monitoring -- eight objects reported
Chronology

Resources:

Consolidated Risk Tables - CRT page
Ephemerides for risk-rated objects

Notes: Until September 16th this daily news page, which had included links to news and to science papers as well as some occasional original reporting, was called Major News About Minor Objects. Without the news-link and science-link sections, this page was renamed as The Tracking News to more accurately reflect its continuing purpose.

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.

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 13 October '07

The MPC's NEO Confirmation Page has 20 listings: 9 new, 11 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had nine new and eleven updated listings. Of these, sixteen were "one nighters." So far Tracking News has counted a total of 33 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 13 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-T98 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2007-T99 time-stamped "16:59 UT" - 2007 TC66 - see below
MPEC 2007-T100 time-stamped "17:02 UT" - 2007 TD66 - see below
MPEC 2007-T101 time-stamped "17:11 UT" - 2007 TE66 - see below
MPEC 2007-T102 time-stamped "20:32 UT" - 2007 TF68

MPEC 2007-T102 - "20:32 UT" - 2007 TF68

K07T68F 2007 TF68 (small asteroid, H=23.1 ~81m) was discovered at 0600 UT on 13 Oct. by the Catalina Sky Survey (CSS), which observed it at Oct. 13.25-27p4, 13.34p3, and 13.40p4. The discovery was confirmed by Heidelberg-Konigstuhl Obs. (Oct. 13.81-82p3).

MPEC 2007-T101 - "17:11 UT" - 2007 TE66

K07T66E 2007 TE66 (risk-listed, H=21.1 ~204m) was discovered at 1054 UT on 12 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 12.45-50p7 and 13.40p4. The discovery was confirmed by Grasslands Obs. (Oct. 13.34-35p3).

MPEC 2007-T100 - "17:02 UT" - 2007 TD66

K07T66D 2007 TD66 (borderline-small, H=21.9 ~141m) was discovered at 0902 UT on 12 Oct. by the MLS, which observed it at Oct. 12.38-43p8 and 13.33p4. The discovery was confirmed by Grasslands Obs. (Oct. 12.42p3).

MPEC 2007-T99 - "16:59 UT" - 2007 TC66

K07T66C 2007 TC66 (risk-listed, Q=5.026 AU, H=19.1 ~513m) was discovered at 0814 UT on 12 Oct. by the CSS, which observed it at Oct. 12.34-41p8 and 13.35-36p4. The discovery was confirmed by Grasslands Obs. (Oct. 12.41p3) and Mt. John Obs. (Oct. 12.66-67p3).

<< DOU on 13 Oct. '07 >> MPEC 2007-T98 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K07T25A 2007 TA25 (Q=4.287 AU, arc=1 day, H=19.7 ~389m) from Junk Bond Obs. (Oct. 12.32-39p8)
K07T23L 2007 TL23 (q=0.300 AU, arc=1 day, H=21.3 ~186m) from Mataro Obs. (Oct. 11.86-87p3), Petit Jean Mtn. South Obs. (PJMSO) (Oct. 12.30-31p8), and the Siding Spring Survey (SSS) (Oct. 12.58p2)
K07T23B 2007 TB23 (i=39.9°, arc=2 days, H=18.7 ~616m) from Junk Bond Obs. (Oct. 12.41-46p3)
K07T18V 2007 TV18 (small asteroid, arc=3 days, H=23.5 ~68m) from the Spacewatch 1.8m telescope (Oct. 12.12-13p3)
Observations of recently (no longer) risk-listed objects
K07T14C 2007 TC14 (small asteroid, arc=5 days, H=22.2 ~123m) from PJMSO (Oct. 12.34-35p8) and Begues Obs. (Oct. 12.91p3)
K07T14B 2007 TB14 (small asteroid, Q=4.094 AU, arc=4 days, H=24.4 ~45m) from the Spacewatch 0.9m telescope (Oct. 12.21-25p3)
K07T01H 2007 TH1 (almost small, arc=8 days, H=22.0 ~135m) from Begues Obs. (Oct. 12.92-93p4)
K07S06Q 2007 SQ6 (almost small, arc=20 days, H=21.9 ~141m) from Spacewatch 1.8m (Oct. 12.09-10p3)
K07S00J 2007 SJ (arc=25 days, H=16.4 ~1.78 km) from Desert Moon Obs. (Oct. 12.21-25p3)
K07R19X 2007 RX19 (i=40.4°, arc=28 days, H=18.4 ~708m) from LINEAR (Oct. 12.10-14p4) and CSS (Oct. 12.13-15p4)
K07R09V 2007 RV9 (arc=32 days, H=20.1 ~323m) from Spacewatch 1.8m (Oct. 12.11p3)
Observations of small asteroids (H>22.0)
K07T18T 2007 TT18 (arc=3 days, H=23.1 ~81m) from CSS (Oct. 12.16-18p4)
K00T01H 2000 TH1 (arc=2 opp, H=22.6 ~102m) from Lumezzane Obs. (Oct. 12.04-05p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K07T24Q 2007 TQ24 (q=0.364 AU, arc=1 day, H=22.0 ~135m) from Mt. John Obs. (Oct. 12.52-53p3)
Observations of other objects
K07T65R 2007 TR65 (i=43.7°, arc=1 day, H=18.9 ~562m) from Farra d'Isonzo Obs. (Oct. 12.98-99p2)
K07T24V 2007 TV24 (arc=1 day, H=17.9 ~891m) from LINEAR (Oct. 12.36-41p5) and Junk Bond Obs. (Oct. 12.41-45p3)
K07T19S 2007 TS19 (arc=2 days, H=20.8 ~234m) from Tradate Obs. (Oct. 11.94p3)
K07T19A 2007 TA19 (arc=3 days, H=19.6 ~407m) from SSS (Oct. 12.57p2)
K07T15G 2007 TG15 (arc=5 days, H=19.8 ~371m) from Begues Obs. (Oct. 12.85p3)
K07T08K 2007 TK8 (arc=6 days, H=20.9 ~224m) from LINEAR (Oct. 12.25-30p5)
K07T08G 2007 TG8 (Q=4.304 AU, arc=30 days, H=18.8 ~589m) from Lumezzane Obs. (Oct. 11.99-00p4), PJMSO (Oct. 12.28-29p6), and Begues Obs. (Oct. 12.83p3)
K07S11V 2007 SV11 (arc=15 days, H=18.0 ~851m) from Desert Moon Obs. (Oct. 12.10-12p3)
K07S11E 2007 SE11 (i=48.2°, arc=22 days, H=17.7 ~977m) from Desert Moon Obs. (Oct. 12.50p3)
K07R17W 2007 RW17 (arc=29 days, H=21.3 ~186m) from CSS (Oct. 12.20-22p4)
K07R17U 2007 RU17 (q=0.356 AU, arc=29 days, H=18.3 ~741m) from CSS (Oct. 12.16-18p3)
K07R10U 2007 RU10 (arc=31 days, H=19.0 ~537m) from Desert Moon Obs. (Oct. 12.15-19p3)
K07R05F 2007 RF5 (arc=37 days, H=18.4 ~708m) from Lumezzane Obs. (Oct. 12.01p4), PJMSO (Oct. 12.33-34p6), and Begues Obs. (Oct. 12.87-88p3)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from LINEAR (Oct. 12.26-30p5) and PJMSO (Oct. 12.36-37p6)
K07O00V 2007 OV (arc=88 days, H=19.2 ~490m) from PJMSO (Oct. 12.27-28p6)
K07K04N 2007 KN4 (Q=5.446 AU, arc=3 opp, H=16.9 ~1.41 km) from LONEOS (Oct. 12.29-37p4) and PJMSO (Oct. 12.32-33p5)
K07H03W 2007 HW3 (Q=4.273 AU, arc=177 days, H=20.4 ~282m) from LINEAR (Oct. 12.21-25p4)
K05S00G 2005 SG (arc=4 opp, H=18.9 ~562m) from LINEAR (Oct. 12.31-35p5)
K04K01E 2004 KE1 (arc=2 opp, H=21.6 ~162m) from Lumezzane Obs. (Oct. 11.97p3) and CSS (Oct. 12.17-18p2)
K02U31A 2002 UA31 (arc=4 opp, H=19.0 ~537m) from Lumezzane Obs. (Oct. 11.91p4)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from LINEAR (Oct. 12.26-30p5) and LONEOS (Oct. 12.28-36p4)
K01R47Y 2001 RY47 (arc=3 opp, H=19.5 ~426m) from Lumezzane Obs. (Oct. 11.98p4), LINEAR (Oct. 12.19-24p5), and PJMSO (Oct. 12.29-30p5)
K01F90D 2001 FD90 (arc=3 opp, H=19.1 ~513m) from MLS (Oct. 12.24-26p4)
J98S04V 1998 SV4 (i=53.3°, q=0.292 AU, arc=5 opp, H=18.1 ~812m) from SSS (Oct. 12.71-74p4)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from LINEAR (Oct. 12.31-34p4)
J89D00A 1989 DA (arc=4 opp, H=19.0 ~537m) from MLS (Oct. 12.37-39p4)
G2980 162980 2001 RR17 from MLS (Oct. 12.33-34p4)
F2787 152787 1999 TB10 from Lumezzane Obs. (Oct. 12.00-01p4)
E5656 145656 4788 P-L from LONEOS (Oct. 12.09-15p4)
E3678 143678 2003 SA224 from LONEOS (Oct. 12.38-44p4)
D8883 138883 2000 YL29 from LINEAR (Oct. 12.08-13p5) and Begues Obs. (Oct. 12.78-81p3)
90373 90373 2003 SZ219 from LINEAR (Oct. 12.14-17p4) and MLS (Oct. 12.19-21p4)
85770 85770 1998 UP1 from LONEOS (Oct. 12.39-45p4)
85275 85275 1994 LY from SSS (Oct. 12.66-70p4)
68063 68063 2000 YJ66 from LINEAR (Oct. 12.42-47p5)
66251 66251 1999 GJ2 from LINEAR (Oct. 11.37-41p5)
53426 53426 1999 SL5 from Lumezzane Obs. (Oct. 11.86p4)
21277 21277 1996 TO5 from Begues Obs. (Oct. 12.82p3)
05143 5143 Heracles (1991 VL) from LINEAR (Oct. 12.14-18p5)
04954 4954 Eric (1990 SQ) from Begues Obs. (Oct. 12.80p3)
04503 4503 Cleobulus (1989 WM) from Spacewatch 0.9m (Oct. 12.49-51p3)
04486 4486 Mithra (1987 SB) from Spacewatch 0.9m (Oct. 12.37-41p3)
04183 4183 Cuno (1959 LM) from LINEAR (Oct. 12.14-19p4)
02212 2212 Hephaistos (1978 SB) from Spacewatch 0.9m (Oct. 12.26-30p3) and LINEAR (Oct. 12.31-35p5)
01862 1862 Apollo (1932 HA) from LINEAR (Oct. 12.43-47p5)

Observers on 13 October '07

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`170`	Begues Obs. in Spain, 8 in MPEC 2007-T98 -- 2007 TH1, 2007 TG8, 2007 TG15, 2007 TC14, 2007 RF5, 21277, 138883, 4954
`703`	Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2007-T98, 2007-T99 & 2007-T102 -- 2007 TT18, 2007 TF68, 2007 TC66, 2007 RX19, 2007 RW17, 2007 RU17, 2004 KE1
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2007-T98 -- 2007 SV11, 2007 SJ, 2007 SE11, 2007 RU10
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-T98 -- 2007 TR65
`651`	Grasslands Obs. in Arizona, 3 in MPECs 2007-T99, 2007-T100 & 2007-T101 -- 2007 TE66, 2007 TD66, 2007 TC66
`024`	Heidelberg-Konigstuhl Obs. in Germany, 1 in MPEC 2007-T102 -- 2007 TF68
`701`	Junk Bond Obs. in Arizona, 3 in MPEC 2007-T98 -- 2007 TV24, 2007 TB23, 2007 TA25
`704`	LINEAR in New Mexico, 17 in MPEC 2007-T98 -- 2007 TV24, 2007 TK8, 2007 RX19, 2007 PU11, 2007 HW3, 2005 SG, 2002 RC118, 2001 RY47, 1993 TQ2, 90373, 68063, 66251, 138883, 5143, 4183, 2212, 1862
`699`	LONEOS in Arizona, 5 in MPEC 2007-T98 -- 2007 KN4, 2002 RC118, 85770, 145656, 143678
`130`	Lumezzane Obs. in Italy, 8 in MPEC 2007-T98 -- 2007 TG8, 2007 RF5, 2004 KE1, 2002 UA31, 2001 RY47, 2000 TH1, 53426, 152787
`A06`	Mataro Obs. in Spain, 1 in MPEC 2007-T98 -- 2007 TL23
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2007-T98 & 2007-T99 -- 2007 TQ24, 2007 TC66
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2007-T98, 2007-T100 & 2007-T101 -- 2007 TE66, 2007 TD66, 2001 FD90, 1989 DA, 90373, 162980
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2007-T98 -- 2007 TL23, 2007 TG8, 2007 TC14, 2007 RF5, 2007 PU11, 2007 OV, 2007 KN4, 2001 RY47
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2007-T98 -- 2007 TL23, 2007 TA19, 1998 SV4, 85275
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2007-T98 -- 2007 TB14, 4503, 4486, 2212
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2007-T98 -- 2007 TV18, 2007 SQ6, 2007 RV9
`B39`	Tradate Obs. in Italy, 1 in MPEC 2007-T98 -- 2007 TS19

Impact Risk Monitoring on 13 October '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 TY24	NEODyS	1313	2046-2052	3	2.34e-08	-7.81	-8.11	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2007/10/11.376 to 2007/10/12.365."

2007 TV18	NEODyS	1313	2060-2064	2	5.89e-10	-8.72	-8.79	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2007/10/09.205 to 2007/10/12.135."
2007 TV18	JPL	1313	R E M O V E D						JPL: Risk listing removed at 1024 UTC.

2007 TU24	NEODyS	1400	2022-2084	14	2.25e-07	-4.09	-4.20	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2007/10/11.269 to 2007/10/12.495."

2007 TL23	JPL	1359	R E M O V E D						JPL: Risk listing removed at 1344 UTC.
2007 TL23	NEODyS	1313	R E M O V E D

2007 TE66	JPL	2107	2019-2106	86	2.0e-07	-4.75	-5.52	0	JPL: "Analysis based on 14 observations spanning .94735 days (2007-Oct-12.45462 to 2007-Oct-13.40197)." Diameter approximately 0.200 km. from mean, weighted H=21.2.

2007 TC66	JPL	1958	2082-2101	6	7.7e-09	-5.14	-5.36	0	JPL: "Analysis based on 18 observations spanning 1.0190 days (2007-Oct-12.34343 to 2007-Oct-13.36247)." Diameter approximately 0.520 km. from mean, weighted H=19.1.

2007 TB23	JPL	1313	2035-2107	42	4.2e-07	-3.08	-3.53	0	JPL: "Analysis based on 18 observations spanning 2.0688 days (2007-Oct-10.38885 to 2007-Oct-12.45763)." Diameter approximately 0.588 km. from mean, weighted H=18.8.
2007 TB23	NEODyS	1313	2035-2076	3	2.65e-07	-3.23	-3.55	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/10/10.390 to 2007/10/12.458."

2007 TA25	JPL	1313	2104	1	3.9e-10	-6.91	-6.91	0	JPL: "Analysis based on 18 observations spanning 1.0573 days (2007-Oct-11.33329 to 2007-Oct-12.39054)." Diameter approximately 0.410 km. from mean, weighted H=19.6.

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 an 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" for more about this.

Chronology on 13 October '07

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

2107	Noted that JPL has posted 2007 TE66 as an impact risk - see above Grabbed MPEC 2007-T102 - 2007 TF68 - see above
1958	Noted that JPL has posted 2007 TC66 as an impact risk - see above
1807	Grabbed MPEC 2007-T99 - 2007 TC66 - see above Grabbed MPEC 2007-T100 - 2007 TD66 - see above Grabbed MPEC 2007-T101 - 2007 TE66 - see above
1359	Noted that JPL has removed 2007 TL23 as an impact risk - see above Noted that NEODyS has posted 2007 TU24 as an impact risk - see above
1314	Grabbed MPEC 2007-T98 - Daily Orbit Update - see above
1313	Noted that JPL has updated its 2007 TA25 risk assessment - see above Noted that JPL has posted 2007 TB23 as an impact risk - see above Noted that NEODyS has posted 2007 TB23 as an impact risk - see above Noted that NEODyS has removed 2007 TL23 as an impact risk - see above Noted that JPL has removed 2007 TV18 as an impact risk - see above Noted that NEODyS has updated its 2007 TV18 risk assessment - see above Noted that NEODyS has posted 2007 TY24 as an impact risk - see above

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