21 Oct '07 Tracking News

Contents on 21 October '07

IAU Minor Planet Center
- NEOCP Activity -- 17 listings: 3 new, 14 updated
- New MPECs -- two MPECs
- Observers -- 21 observing facilities
Impact Risk Monitoring -- two 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 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 21 October '07

The MPC's NEO Confirmation Page has 17 listings: 3 new, 14 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and fourteen updated listings. Of these, ten 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 21 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-U44 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2007-U45 time-stamped "23:26 UT" - Comet P/2007 T6 (Catalina)

MPEC 2007-U45 - "23:26 UT" - Comet P/2007 T6 (Catalina)

PK07T060 P/2007 T6 (q=2.217 AU, Q=6.327 AU, TP=2007 Aug. 17.017 TT) from RAS Obs. Mayhill (Oct. 15.42-44p2), Schiaparelli Obs. (Oct. 16.14p1), Kiev Comet Station (Oct. 17.04-06p4), Ageo Obs. (Oct. 20.72p1 & 20.80p1), and Nazaret Obs. (Oct. 21.14-16p3)

<< DOU on 21 Oct. '07 >> MPEC 2007-U44 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K07U03T 2007 UT3 (small asteroid, arc=1 day, H=25.7 ~25m) from LINEAR (Oct. 20.31-35p4)
K07U01Y 2007 UY1 (small asteroid, arc=2 days, H=23.0 ~85m) from LINEAR (Oct. 20.08-10p3)
Observations of recently (no longer) risk-listed objects
K07T66E 2007 TE66 (arc=8 days, H=21.1 ~204m) from the Mt. Lemmon Survey (MLS) (Oct. 20.36-37p4)
K07T25A 2007 TA25 (arc=9 days, H=20.0 ~339m) from the Spacewatch 1.8m telescope (Oct. 20.26-27p3)
K07T24Y 2007 TY24 (small asteroid, Q=4.013 AU, arc=9 days, H=25.3 ~29m) from Spacewatch 1.8m (Oct. 20.29-30p3)
K07T23L 2007 TL23 (q=0.299 AU, arc=9 days, H=21.5 ~170m) from Desert Moon Obs. (Oct. 20.17-21p3)
K07T23C 2007 TC23 (Q=4.317 AU, arc=6 days, H=20.6 ~257m) from KLENOT (Oct. 16.06p5)
K07T18U 2007 TU18 (small asteroid, Q=4.016 AU, arc=11 days, H=25.0 ~34m) from LINEAR (Oct. 20.31-35p4)
K07T15M 2007 TM15 (i=61.5°, arc=12 days, H=21.2 ~195m) from Guidestar Obs. (Oct. 20.76-79p3)
Observations of small asteroids (H>22.0)
K07U03U 2007 UU3 (arc=1 day, H=23.7 ~62m) from Astronomical Research Obs. (ARO) (Oct. 20.33p3)
K07U03S 2007 US3 (arc=1 day, H=22.2 ~123m) from LINEAR (Oct. 20.25-30p5) and ARO (Oct. 20.25-26p3)
Observations of other objects
K07U03W 2007 UW3 (arc=1 day, H=19.5 ~426m) from ARO (Oct. 20.33-34p3)
K07U03V 2007 UV3 (i=37.2°, q=0.273 AU, arc=1 day, H=18.9 ~562m) from LINEAR (Oct. 20.31-35p4), ARO (Oct. 20.32p3), and Junk Bond Obs. (Oct. 20.37-38p4)
K07U03R 2007 UR3 (arc=11 days, H=21.2 ~195m) from ARO (Oct. 20.28-30p4)
K07T68S 2007 TS68 (arc=8 days, H=19.5 ~426m) from Spacewatch 1.8m (Oct. 20.42-43p3)
K07T19S 2007 TS19 (arc=10 days, H=20.7 ~245m) from the Catalina Sky Survey (CSS) (Oct. 20.19-20p4), LINEAR (Oct. 20.19-24p5), Greiner Research Obs. (Oct. 20.24-25p15), and University Hills Obs. (Oct. 20.25-28p6)
K07T15G 2007 TG15 (arc=12 days, H=19.8 ~371m) from New Millennium Obs. (Oct. 12.97-01p8) and Desert Moon Obs. (Oct. 20.23-24p3)
K07T14D 2007 TD14 (arc=2 opp, H=18.7 ~616m) from Desert Moon Obs. (Oct. 20.38-41p3)
K07T08G 2007 TG8 (Q=4.308 AU, arc=36 days, H=18.9 ~562m) from New Millennium Obs. (Oct. 12.97-00p4)
K07RE7T 2007 RT147 (arc=39 days, H=18.1 ~812m) from MLS (Oct. 20.27-29p4)
K07R19X 2007 RX19 (i=40.4°, arc=36 days, H=18.4 ~708m) from Desert Moon Obs. (Oct. 20.09-13p3)
K07R12U 2007 RU12 (arc=38 days, H=19.9 ~355m) from Greiner Research Obs. (Oct. 20.38p4)
K07R05F 2007 RF5 (arc=45 days, H=18.4 ~708m) from New Millennium Obs. (Oct. 12.98-01p6) and University Hills Obs. (Oct. 20.16-17p6)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from New Millennium Obs. (Oct. 13.03-06p6), North Obs. (Oct. 20.06p3), and CSS (Oct. 20.30-32p4)
K07P09R 2007 PR9 (arc=70 days, H=20.6 ~257m) from Desert Moon Obs. (Oct. 20.26-28p3)
K07L32R 2007 LR32 (arc=147 days, H=17.2 ~1.23 km) from New Millennium Obs. (Oct. 12.96-99p6)
K07D41A 2007 DA41 (arc=3 opp, H=17.6 ~1.02 km) from Fiamene Obs. (Oct. 15.78-79p5)
K05S00G 2005 SG (arc=4 opp, H=19.0 ~537m) from New Millennium Obs. (Oct. 13.09-17p10)
K04V00V 2004 VV (i=52.4°, arc=3 opp, H=17.3 ~1.17 km) from Fiamene Obs. (Oct. 19.79-80p4)
K02U03R 2002 UR3 (i=48.6°, q=0.285 AU, arc=5 opp, H=16.5 ~1.70 km) from New Millennium Obs. (Oct. 13.11-16p5) and Libbiano Obs. (Oct. 21.17p2)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from New Millennium Obs. (Oct. 13.03-06p6) and the Spacewatch 0.9m telescope (Oct. 20.25-29p3)
K01SQ9W 2001 SW269 (arc=3 opp, H=19.3 ~467m) from Desert Moon Obs. (Oct. 20.31-35p3)
K01R47Y 2001 RY47 (arc=3 opp, H=19.5 ~426m) from New Millennium Obs. (Oct. 12.96-00p6)
J99S05O 1999 SO5 (arc=2 opp, H=20.9 ~224m) from Spacewatch 1.8m (Oct. 20.40-41p3)
G4216 164216 2004 OT11 from LINEAR (Oct. 20.14-17p4)
G2215 162215 1999 TL12 from LINEAR (Oct. 20.33-36p4)
G2173 162173 1999 JU3 from LINEAR (Oct. 20.14-19p5)
F2787 152787 1999 TB10 from New Millennium Obs. (Oct. 12.98-01p4)
E3678 143678 2003 SA224 from New Millennium Obs. (Oct. 13.04-07p6)
85770 85770 1998 UP1 from New Millennium Obs. (Oct. 13.03-07p6)
22771 22771 1999 CU3 from New Millennium Obs. (Oct. 13.04-07p4)
20826 20826 2000 UV13 from New Millennium Obs. (Oct. 12.99-02p4)
20429 20429 1998 YN1 from MLS (Oct. 20.24-26p4)
04954 4954 Eric (1990 SQ) from LINEAR (Oct. 20.14-19p4)
04486 4486 Mithra (1987 SB) from Spacewatch 0.9m (Oct. 20.32-35p3)
03671 3671 Dionysus (1984 KD) from LINEAR (Oct. 20.32-36p4)
03553 3553 Mera (1985 JA) from New Millennium Obs. (Oct. 13.09-16p8)
02212 2212 Hephaistos (1978 SB) from New Millennium Obs. (Oct. 13.03-06p6) and Spacewatch 0.9m (Oct. 20.24-27p3)
01865 1865 Cerberus (1971 UA) from New Millennium Obs. (Oct. 13.11-14p5)

Observers on 21 October '07

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

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2007-U45 -- P/2007 T6
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2007-U44 -- 2007 UW3, 2007 UV3, 2007 UU3, 2007 US3, 2007 UR3
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 PU11
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2007-U44 -- 2007 TL23, 2007 TG15, 2007 TD14, 2007 RX19, 2007 PR9, 2001 SW269
`B23`	Fiamene Obs. in Italy, 2 in MPEC 2007-U44 -- 2007 DA41, 2004 VV
`H51`	Greiner Research Obs. in Wisconsin, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 RU12
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2007-U44 -- 2007 TM15
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2007-U44 -- 2007 UV3
`246`	KLENOT in the Czech Republic, 1 in MPEC 2007-U44 -- 2007 TC23
`585`	Kiev Comet Station in the Ukraine, 1 in MPEC 2007-U45 -- P/2007 T6
`704`	LINEAR in New Mexico, 11 in MPEC 2007-U44 -- 2007 UY1, 2007 UV3, 2007 UT3, 2007 US3, 2007 TU18, 2007 TS19, 164216, 162215, 162173, 4954, 3671
`B33`	Libbiano Obs. in Italy, 1 in MPEC 2007-U44 -- 2002 UR3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2007-U44 -- 2007 TE66, 2007 RT147, 20429
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2007-U45 -- P/2007 T6
`A24`	New Millennium Obs. in Italy, 17 in MPEC 2007-U44 -- 2007 TG8, 2007 TG15, 2007 RF5, 2007 PU11, 2007 LR32, 2005 SG, 2002 UR3, 2002 RC118, 2001 RY47, 85770, 22771, 20826, 152787, 143678, 3553, 2212, 1865
`J69`	North Obs. in England, 1 in MPEC 2007-U44 -- 2007 PU11
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-U45 -- P/2007 T6
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2007-U45 -- P/2007 T6
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2007-U44 -- 2002 RC118, 4486, 2212
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2007-U44 -- 2007 TY24, 2007 TS68, 2007 TA25, 1999 SO5
`G72`	University Hills Obs. in southern California, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 RF5

Impact Risk Monitoring on 21 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 UT3	JPL Sentry	1438	2011-2105	677	9.4e-05	-3.63	-3.77	0	JPL: "Analysis based on 9 observations spanning 1.0804 days (2007-Oct-19.2989 to 2007-Oct-20.37927)." Diameter approximately 0.025 km. from mean, weighted H=25.7.

2007 UY1	JPL Sentry	1438	2045-2107	13	9.2e-08	-6.44	-6.91	0	JPL: "Analysis based on 29 observations spanning 1.9560 days (2007-Oct-18.14415 to 2007-Oct-20.10014)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2007 UY1	NEODyS	1438	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 21 October '07

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

2354	Grabbed MPEC 2007-U45 - Comet P/2007 T6 (Catalina) - see above
1439	Grabbed MPEC 2007-U44 - Daily Orbit Update - see above
1438	Noted that JPL Sentry has posted 2007 UT3 as an impact risk - see above Noted that JPL Sentry has updated its 2007 UY1 risk assessment - see above Noted that NEODyS has removed 2007 UY1 as an impact risk - see above

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