20 Oct '07 Tracking News

Contents on 20 October '07

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 1 new, 6 updated
- New MPECs -- seven MPECs
- Observers -- 24 observing facilities
Impact Risk Monitoring -- five 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: Marching toward complete automation, we have inaugurated on October 18th an RSS news feed that is generated from the same scripts used to produce these daily news pages, replacing previously manual RSS creation. This provides faster and more complex (and surer) linking to both the related A/CC news items and, when available, now also to the original documents. And so this means not only an RSS news feed for A/CC reporting but also for MPECs and active risk assessments. Additionally, this change allows providing an alternate RSS feed for daily news as published on A/CC's backup Web site.

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 20 October '07

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eighteen 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 20 October '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-U37 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2007-U38 time-stamped "15:24 UT" - 2007 UR3 - see below
MPEC 2007-U39 time-stamped "15:27 UT" - 2007 US3 - see below
MPEC 2007-U40 time-stamped "15:30 UT" - 2007 UT3 - see below
MPEC 2007-U41 time-stamped "15:33 UT" - 2007 UU3 - see below
MPEC 2007-U42 time-stamped "15:36 UT" - 2007 UV3 - see below
MPEC 2007-U43 time-stamped "15:38 UT" - 2007 UW3

MPEC 2007-U43 - "15:38 UT" - 2007 UW3

K07U03W 2007 UW3 (H=19.5 ~426m) was discovered at 1059 UT on 19 Oct. by the Catalina Sky Survey (CSS), which observed it at Oct. 19.46-48p3 and 20.37-38p3. The discovery was confirmed by Remanzacco Obs. (Oct. 19.91-97p4), Guidestar Obs. (Oct. 20.11-13p3), Magdalena Ridge Obs. (MRO) (Oct. 20.29p5), and Grasslands Obs. (Oct. 20.31-32p3).

MPEC 2007-U42 - "15:36 UT" - 2007 UV3

K07U03V 2007 UV3 (q=0.312 AU, H=18.9 ~562m) was discovered at 0729 UT on 19 Oct. by LINEAR, which observed it at Oct. 19.31-34p4. The discovery was confirmed by CSS (Oct. 20.36-38p3) and Farpoint Obs. (Oct. 20.42-43p4).

MPEC 2007-U41 - "15:33 UT" - 2007 UU3

K07U03U 2007 UU3 (small asteroid, H=23.6 ~65m) was discovered at 0713 UT on 19 Oct. by LINEAR, which observed it at Oct. 19.30-34p5. The discovery was confirmed by CSS (Oct. 20.36-38p4).

MPEC 2007-U40 - "15:30 UT" - 2007 UT3

K07U03T 2007 UT3 (small asteroid, Earth MOID=0.0 LD, H=25.7 ~25m) was discovered at 0710 UT on 19 Oct. by LINEAR, which observed it at Oct. 19.30-34p5. The discovery was confirmed by CSS (Oct. 20.36-38p4). This object is now within ten lunar distances (LD) of Earth, reaching 5.4 LD on 24 Oct.

MPEC 2007-U39 - "15:27 UT" - 2007 US3

K07U03S 2007 US3 (small asteroid, H=22.1 ~129m) was discovered at 0559 UT on 19 Oct. by LINEAR, which observed it at Oct. 19.25-29p4. The discovery was confirmed by Grasslands Obs. (Oct. 20.25-26p3), MRO (Oct. 20.27p5), and CSS (Oct. 20.27-29p3).

MPEC 2007-U38 - "15:24 UT" - 2007 UR3

K07U03R 2007 UR3 (H=21.0 ~214m) was discovered at 0417 UT on 19 Oct. by the Spacewatch 0.9m telescope, which observed it at Oct. 9.21-25p3 and 19.18-21p3. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 19.28-29p3 & 20.21-22p3) and the Mt. Lemmon Survey (MLS) (Oct. 20.32-34p4).

<< DOU on 20 Oct. '07 >> MPEC 2007-U37 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K07T71D 2007 TD71 (i=49.5°, arc=6 days, H=18.4 ~708m) from the Siding Spring Survey (SSS) (Oct. 19.63p1 & 19.77p1)
K07T23B 2007 TB23 (i=37.9°, arc=9 days, H=18.7 ~616m) from Spacewatch 1.8m (Oct. 19.24-25p3) and LINEAR (Oct. 19.30-34p5)
K07T16L 2007 TL16 (small asteroid, arc=10 days, H=26.2 ~19m) from Spacewatch 1.8m (Oct. 19.37-40p5)
Observations of recently (no longer) risk-listed objects
K07T66C 2007 TC66 (arc=7 days, H=19.3 ~467m) from Desert Moon Obs. (Oct. 19.30-32p3)
K07T23L 2007 TL23 (q=0.300 AU, arc=8 days, H=21.5 ~170m) from Desert Moon Obs. (Oct. 19.13-17p3)
K07T18X 2007 TX18 (arc=10 days, H=17.3 ~1.17 km) from Desert Moon Obs. (Oct. 19.34-37p3) and Petit Jean Mtn. South Obs. (PJMSO) (Oct. 19.38-39p6)
K07T18U 2007 TU18 (small asteroid, Q=4.020 AU, arc=10 days, H=25.1 ~32m) from LINEAR (Oct. 19.30-34p5)
Observations of small asteroids (H>22.0)
K07T71E 2007 TE71 (arc=6 days, H=24.3 ~47m) from Spacewatch 1.8m (Oct. 20.17-18p3 at V=22.8)
K07T24X 2007 TX24 (arc=8 days, H=25.0 ~34m) from Spacewatch 1.8m (Oct. 19.44-45p3)
K07R12P 2007 RP12 (arc=38 days, H=24.6 ~41m) from Spacewatch 1.8m (Oct. 19.32-33p3)
K07P09Q 2007 PQ9 (arc=69 days, H=22.1 ~129m) from SSS (Oct. 19.62p1)
Observations of almost-small asteroids (21.7<H<=22.0)
K07T66D 2007 TD66 (arc=8 days, H=21.9 ~141m) from Desert Moon Obs. (Oct. 19.25-27p3) and Jornada Obs. (Oct. 20.10-12p4)
K07T24Q 2007 TQ24 (q=0.366 AU, arc=9 days, H=22.0 ~135m) from SSS (Oct. 19.50p1) and Spacewatch 1.8m (Oct. 20.15-16p3)
Observations of other objects
K07U02A 2007 UA2 (arc=12 days, H=20.9 ~224m) from Junk Bond Obs. (Oct. 19.26-30p3)
K07T74O 2007 TO74 (arc=5 days, H=19.6 ~407m) from Jornada Obs. (Oct. 20.14-16p3)
K07T68W 2007 TW68 (arc=6 days, H=19.2 ~490m) from Spacewatch 1.8m (Oct. 19.45-46p3)
K07T24R 2007 TR24 (arc=9 days, H=20.4 ~282m) from Shenton Park Obs. (Oct. 18.66-67p3) and Greiner Research Obs. (Oct. 20.22p4)
K07T19S 2007 TS19 (arc=10 days, H=20.7 ~245m) from Urseanu Obs. (Oct. 16.97-99p4), LINEAR (Oct. 19.24-28p5), MLS (Oct. 19.28-29p3), and Greiner Research Obs. (Oct. 20.19p5)
K07T19J 2007 TJ19 (i=40.7°, arc=9 days, H=20.9 ~224m) from LINEAR (Oct. 19.19-23p5)
K07T19A 2007 TA19 (arc=10 days, H=19.6 ~407m) from SSS (Oct. 19.40-43p2)
K07T18T 2007 TT18 from Shenton Park Obs. (Oct. 18.71-72p3)
K07T15G 2007 TG15 (arc=11 days, H=19.8 ~371m) from Desert Moon Obs. (Oct. 19.19-20p3)
K07T08G 2007 TG8 (Q=4.307 AU, arc=36 days, H=18.9 ~562m) from New Millennium Obs. (Oct. 16.90p1) and PJMSO (Oct. 19.24p6)
K07S11E 2007 SE11 (i=48.3°, arc=29 days, H=17.7 ~977m) from Desert Moon Obs. (Oct. 19.39-40p3)
K07S06P 2007 SP6 (arc=28 days, H=18.0 ~851m) from LINEAR (Oct. 19.36-40p5)
K07S01R 2007 SR1 (arc=31 days, H=19.7 ~389m) from Spacewatch 1.8m (Oct. 19.34-35p3)
K07R19T 2007 RT19 (arc=2 opp, H=18.3 ~741m) from LINEAR (Oct. 19.29-34p5) and PJMSO (Oct. 19.41-43p7)
K07R17U 2007 RU17 (q=0.356 AU, arc=36 days, H=18.2 ~776m) from PJMSO (Oct. 19.27-28p6)
K07R12U 2007 RU12 (arc=37 days, H=19.8 ~371m) from LINEAR (Oct. 19.30-34p5) and CSS (Oct. 19.34-37p4)
K07R10U 2007 RU10 (arc=38 days, H=19.1 ~513m) from Desert Moon Obs. (Oct. 19.08-10p3)
K07R05F 2007 RF5 (arc=44 days, H=18.4 ~708m) from PJMSO (Oct. 19.25-26p6)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Urseanu Obs. (Oct. 16.96-99p7), Ametlla del Valles Obs. (Oct. 19.12-13p4), LINEAR (Oct. 19.31-35p5), PJMSO (Oct. 19.33-34p6), and Mandi Obs. (Oct. 19.88p3)
K07M24C 2007 MC24 (arc=117 days, H=19.5 ~426m) from SSS (Oct. 19.62p1)
K07L32R 2007 LR32 (arc=147 days, H=17.2 ~1.23 km) from MRO (Oct. 16.18-19p5 & 19.18-19p5), New Millennium Obs. (Oct. 16.89p2), and PJMSO (Oct. 19.21p6)
K07K04N 2007 KN4 (Q=5.446 AU, arc=3 opp, H=16.9 ~1.41 km) from PJMSO (Oct. 19.28-30p6)
K07D41L 2007 DL41 (arc=2 opp, H=20.6 ~257m) from LINEAR (Oct. 19.30-34p4)
K07D08L 2007 DL8 (Q=4.699 AU, arc=2 opp, H=17.4 ~1.12 km) from SSS (Oct. 19.64-67p4)
K05S71A 2005 SA71 (arc=2 opp, H=18.8 ~589m) from SSS (Oct. 19.46-49p4)
K05S00G 2005 SG (arc=4 opp, H=19.0 ~537m) from PJMSO (Oct. 19.40p5) and Mandi Obs. (Oct. 19.91-93p3)
K04K01E 2004 KE1 (arc=2 opp, H=21.6 ~162m) from CSS (Oct. 19.25-26p3)
K04D00D 2004 DD (arc=4 opp, H=18.8 ~589m) from MLS (Oct. 19.48-49p4)
K02W17W 2002 WW17 (Q=4.998 AU, arc=2 opp, H=17.5 ~1.07 km) from Spacewatch 1.8m (Oct. 19.42-43p3)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from Guadarrama Obs. (Oct. 18.93-94p2), LINEAR (Oct. 19.26-30p5), and PJMSO (Oct. 19.35-36p5)
K01X00D 2001 XD (arc=4 opp, H=18.4 ~708m) from MLS (Oct. 19.44-45p3)
K01U16Y 2001 UY16 (arc=3 opp, H=19.1 ~513m) from SSS (Oct. 19.47-48p2)
K01R47Y 2001 RY47 (arc=3 opp, H=19.5 ~426m) from Goodricke-Pigott Obs. (Oct. 18.15-17p3), LINEAR (Oct. 19.19-23p5), and PJMSO (Oct. 19.23p5)
K00J10N 2000 JN10 (arc=3 opp, H=17.8 ~933m) from LINEAR (Oct. 19.29-34p5)
G2004 162004 1991 VE from LINEAR (Oct. 19.43-47p4)
F9608 159608 2002 AC2 from SSS (Oct. 19.69-72p4)
F3271 153271 2001 CL42 from Inastars Obs. (Oct. 20.01p2)
F2787 152787 1999 TB10 from PJMSO (Oct. 19.30p5)
E3678 143678 2003 SA224 from Ametlla del Valles Obs. (Oct. 19.06-08p4) and PJMSO (Oct. 19.36-37p5)
D8947 138947 2001 BA40 from Desert Moon Obs. (Oct. 19.43-48p3)
66251 66251 1999 GJ2 from LINEAR (Oct. 19.37-42p5)
25916 25916 2001 CP44 from MLS (Oct. 19.44-46p4)
22771 22771 1999 CU3 from Ametlla del Valles Obs. (Oct. 19.01-03p4)
20826 20826 2000 UV13 from PJMSO (Oct. 19.31p5)
04954 4954 Eric (1990 SQ) from CSS (Oct. 19.14-17p4)
03757 3757 1982 XB from MLS (Oct. 19.46-48p4)
02212 2212 Hephaistos (1978 SB) from LINEAR (Oct. 19.26-30p5)
01865 1865 Cerberus (1971 UA) from LINEAR (Oct. 19.37-42p5)

Observers on 20 October '07

A total of 24 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 3 in MPEC 2007-U37 -- 2007 PU11, 22771, 143678
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2007-U37, 2007-U39, 2007-U40, 2007-U41, 2007-U42 & 2007-U43 -- 2007 UW3, 2007 UV3, 2007 UU3, 2007 UT3, 2007 US3, 2007 RU12, 2004 KE1, 4954
`448`	Desert Moon Obs. in New Mexico, 8 in MPEC 2007-U37 -- 2007 TX18, 2007 TL23, 2007 TG15, 2007 TD66, 2007 TC66, 2007 SE11, 2007 RU10, 138947
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2007-U42 -- 2007 UV3
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2007-U37 -- 2001 RY47
`651`	Grasslands Obs. in Arizona, 2 in MPECs 2007-U39 & 2007-U43 -- 2007 UW3, 2007 US3
`H51`	Greiner Research Obs. in Wisconsin, 2 in MPEC 2007-U37 -- 2007 TS19, 2007 TR24
`458`	Guadarrama Obs. in Spain, 1 in MPEC 2007-U37 -- 2002 RC118
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2007-U43 -- 2007 UW3
`B15`	Inastars Obs. in Germany, 1 in MPEC 2007-U37 -- 153271
`715`	Jornada Obs. in New Mexico, 2 in MPEC 2007-U37 -- 2007 TO74, 2007 TD66
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2007-U37 -- 2007 UA2
`704`	LINEAR in New Mexico, 20 in MPECs 2007-U37, 2007-U39, 2007-U40, 2007-U41 & 2007-U42 -- 2007 UV3, 2007 UU3, 2007 UT3, 2007 US3, 2007 TU18, 2007 TS19, 2007 TJ19, 2007 TB23, 2007 SP6, 2007 RU12, 2007 RT19, 2007 PU11, 2007 DL41, 2002 RC118, 2001 RY47, 2000 JN10, 66251, 162004, 2212, 1865
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2007-U37, 2007-U39 & 2007-U43 -- 2007 UW3, 2007 US3, 2007 LR32
`B28`	Mandi Obs. in Italy, 2 in MPEC 2007-U37 -- 2007 PU11, 2005 SG
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2007-U37 & 2007-U38 -- 2007 UR3, 2007 TS19, 2004 DD, 2001 XD, 25916, 3757
`A24`	New Millennium Obs. in Italy, 2 in MPEC 2007-U37 -- 2007 TG8, 2007 LR32
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2007-U37 -- 2007 TX18, 2007 TG8, 2007 RU17, 2007 RT19, 2007 RF5, 2007 PU11, 2007 LR32, 2007 KN4, 2005 SG, 2002 RC118, 2001 RY47, 20826, 152787, 143678
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2007-U43 -- 2007 UW3
`D21`	Shenton Park Obs. in Western Australia, 2 in MPEC 2007-U37 -- 2007 TT18, 2007 TR24
`E12`	Siding Spring Survey (SSS) in New South Wales, 9 in MPEC 2007-U37 -- 2007 TQ24, 2007 TD71, 2007 TA19, 2007 PQ9, 2007 MC24, 2007 DL8, 2005 SA71, 2001 UY16, 159608
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2007-U38 -- 2007 UR3
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2007-U37 & 2007-U38 -- 2007 UR3, 2007 TX24, 2007 TW68, 2007 TQ24, 2007 TL16, 2007 TE71, 2007 TB23, 2007 SR1, 2007 RP12, 2002 WW17
`A92`	Urseanu Obs. in Romania, 2 in MPEC 2007-U37 -- 2007 TS19, 2007 PU11

Impact Risk Monitoring on 20 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 UY1	NEODyS	1643	2050-2073	2	1.75e-08	-7.03	-7.27	0	NEODyS: "Based on 27 optical observations (of which 2 are rejected as outliers) from 2007/10/18.145 to 2007/10/19.226."

2007 UW1	NEODyS	1819	2048-2090	67	4.61e-05	-3.60	-4.32	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2007/10/17.443 to 2007/10/19.483."

2007 TD71	NEODyS	1418	2051-2090	16	2.77e-07	-3.04	-3.85	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/10/13.703 to 2007/10/19.768."
2007 TD71	JPL Sentry	1417	2054-2107	30	3.2e-07	-3.00	-3.80	0	JPL: "Analysis based on 18 observations spanning 6.0653 days (2007-Oct-13.70201 to 2007-Oct-19.76736)." Diameter approximately 0.730 km. from mean, weighted H=18.3.

2007 TB23	JPL Sentry	1417	2097	1	6.7e-10	-6.17	-6.17	0	JPL: "Analysis based on 58 observations spanning 8.9533 days (2007-Oct-10.38885 to 2007-Oct-19.34211)." Diameter approximately 0.610 km. from mean, weighted H=18.7.

2007 TL16	NEODyS	1418	2073-2090	22	6.19e-06	-6.01	-6.19	0	NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2007/10/09.288 to 2007/10/19.403."
2007 TL16	JPL Sentry	1417	2074-2095	13	6.1e-06	-5.95	-6.11	0	JPL: "Analysis based on 43 observations spanning 10.115 days (2007-Oct-09.28741 to 2007-Oct-19.40212)." Diameter approximately 0.021 km. from mean, weighted H=26.1.

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 20 October '07

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

1819	Noted that NEODyS has posted 2007 UW1 as an impact risk - see above
1643	Noted that NEODyS has posted 2007 UY1 as an impact risk - see above
1642	Grabbed MPEC 2007-U40 - 2007 UT3 - see above
1605	Grabbed MPEC 2007-U42 - 2007 UV3 - see above
1559	Grabbed MPEC 2007-U38 - 2007 UR3 - see above Grabbed MPEC 2007-U39 - 2007 US3 - see above Grabbed MPEC 2007-U41 - 2007 UU3 - see above Grabbed MPEC 2007-U43 - 2007 UW3 - see above
1418	Noted that NEODyS has updated its 2007 TD71 risk assessment - see above Noted that NEODyS has updated its 2007 TL16 risk assessment - see above Grabbed MPEC 2007-U37 - Daily Orbit Update - see above
1417	Noted that JPL Sentry has updated its 2007 TB23 risk assessment - see above Noted that JPL Sentry has updated its 2007 TD71 risk assessment - see above Noted that JPL Sentry has updated its 2007 TL16 risk assessment - see above

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