22 Nov '07 Tracking News

Contents on 22 November '07

IAU Minor Planet Center
- NEOCP Activity -- ten listings: 7 new, 3 updated
- New MPECs -- eight MPECs
- Observers -- four observing facilities
Impact Risk Monitoring -- one object reported
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

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 22 November '07

The MPC's NEO Confirmation Page has 10 listings: 7 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven new and three updated listings. Of these, nine 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 22 November '07

Minor Planet Electronic Circulars

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

MPEC 2007-W53 time-stamped "03:02 UT" - Observable Comets - see below
MPEC 2007-W54 time-stamped "03:33 UT" - Distant Minor Planets - see below
MPEC 2007-W55 time-stamped "03:39 UT" - Atens and Apollos - see below
MPEC 2007-W56 time-stamped "03:39 UT" - Amors - see below
MPEC 2007-W57 time-stamped "03:39 UT" - Unusual Minor Planets - see below
MPEC 2007-W58 time-stamped "03:39 UT" - PHAs - see below
MPEC 2007-W59 time-stamped "07:06 UT" - Daily Orbit Update - see below
MPEC 2007-W60 time-stamped "17:44 UT" - 2005 BE2

MPEC 2007-W60 - "17:44 UT" - 2005 BE2

K05B02E 2005 BE2 (H=18.2 ~776m) from Astronomical Research Obs. (ARO) (Nov. 10.43-47p3 at V=22.7-9 & 16.44-47p3 at V=22.6-8)

<< DOU on 22 Nov. '07 >> MPEC 2007-W59 - "07:06 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K07V12D 2007 VD12 (arc=16 days, H=20.0 ~339m) from Hadano Obs. (Nov. 12.67p5) and Hamamatsu-Yuto Obs. (Nov. 21.62-65p4)
Observations of other objects
K07V04Q 2007 VQ4 (Q=4.005 AU, arc=17 days, H=16.0 ~2.14 km, q=1.272 AU) from Hadano Obs. (Nov. 12.75-76p4)
K07T15G 2007 TG15 (arc=42 days, H=19.6 ~407m) from Hadano Obs. (Nov. 12.50-52p4)
K07S11E 2007 SE11 (i=48.3°, arc=62 days, H=17.8 ~933m) from Hadano Obs. (Nov. 14.68p4) and Hamamatsu-Yuto Obs. (Nov. 21.59-61p4)
K07S06P 2007 SP6 (arc=58 days, H=18.1 ~812m) from Hadano Obs. (Nov. 14.79-80p4)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Hadano Obs. (Nov. 15.59-60p5)
87311 87311 2000 QJ1 from the Catalina Sky Survey (CSS) (Nov. 21.52-53p4)
12711 12711 1991 BB from CSS (Nov. 21.52-53p4)
11405 11405 1999 CV3 from CSS (Nov. 21.51-52p4)
11398 11398 1998 YP11 from CSS (Nov. 21.41-42p4)
08176 8176 1991 WA from CSS (Nov. 21.36-38p4)

MPEC 2007-W58 - "03:39 UT" - PHAs

MPEC 2007-W57 - "03:39 UT" - Unusual Minor Planets

MPEC 2007-W56 - "03:39 UT" - Amors

MPEC 2007-W55 - "03:39 UT" - Atens and Apollos

MPEC 2007-W54 - "03:33 UT" - Distant Minor Planets

MPEC 2007-W53 - "03:02 UT" - Observable Comets

Observers on 22 November '07

Four observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2007-W60 -- 2005 BE2
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2007-W59 -- 87311, 12711, 11405, 11398, 8176
`355`	Hadano Obs. in Japan, 6 in MPEC 2007-W59 -- 2007 VQ4, 2007 VD12, 2007 TG15, 2007 SP6, 2007 SE11, 2007 PU11
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-W59 -- 2007 VD12, 2007 SE11

Impact Risk Monitoring on 22 November '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 WV4	NEODyS	1502	2010-2090	183	4.84e-07	-2.88	-3.96	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/11/19.394 to 2007/11/21.419."
2007 WV4	JPL Sentry	0302	2021-2107	177	5.7e-07	-3.00	-4.03	0	JPL: "Analysis based on 12 observations spanning 2.0246 days (2007-Nov-19.39373 to 2007-Nov-21.41833)." Diameter approximately 0.485 km. from mean, weighted H=19.2.

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 22 November '07

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

1923	Grabbed MPEC 2007-W60 - 2005 BE2 - see above
1501	Noted that NEODyS has posted 2007 WV4 as an impact risk - see above Grabbed MPEC 2007-W59 - Daily Orbit Update - see above
0558	Grabbed MPEC 2007-W53 - Observable Comets - see above Grabbed MPEC 2007-W54 - Distant Minor Planets - see above Grabbed MPEC 2007-W55 - Atens and Apollos - see above Grabbed MPEC 2007-W56 - Amors - see above Grabbed MPEC 2007-W57 - Unusual Minor Planets - see above Grabbed MPEC 2007-W58 - PHAs - see above
0302	Noted that JPL Sentry has posted 2007 WV4 as an impact risk - see above

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