2008-09-06 Tracking News

Contents on 6 September '08

IAU Minor Planet Center
- NEOCP Activity -- 15 listings: 2 new, 13 updated
- New MPECs -- one MPEC
Observers -- eleven observing facilities
Impact Risk Monitoring -- four objects
Chronology

Note: These A/CC news pages will update less often and at irregular intervals through Wednesday, September 10th.

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 A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate 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 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 6 September '08

The MPC's NEO Confirmation Page has 15 listings: 2 new, 13 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and thirteen updated listings. Of these, eleven were "one nighters."

New MPECs on 6 September '08

Minor Planet Electronic Circulars

As of last check at 2356 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 6 Sept. '08 >> MPEC 2008-R31 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08R00V 2008 RV (arc=3 days, H=21.7 ~155m) from Mt. John Obs. (Sept. 5.39-40p4 & 5.56p3)
Observations of recently (no longer) risk-listed objects
K08Q11S 2008 QS11 (arc=9 days, H=19.8 ~371m) from Mt. John Obs. (Sept. 5.46-47p3 & 5.58p3)
Observations of small asteroids (H>22.0)
K08R00W 2008 RW (arc=3 days, H=22.8 ~93m) from Mt. John Obs. (Sept. 5.40-41p3 & 5.57p3)
J98S09D 1998 SD9 (q=0.348 AU, arc=2 opp, H=24.3 ~47m) from Petit Jean Mtn. South Obs. (PJMSO) (Sept. 6.21p8)
Observations of almost-small asteroids (21.7<H<=22.0)
K08O08Q 2008 OQ8 (arc=36 days, H=21.9 ~141m) from the Spacewatch 0.9m telescope (Sept. 3.31-34p3)
Observations of other objects
K08Q00Z 2008 QZ (arc=14 days, H=20.5 ~269m) from Spacewatch 0.9m (Sept. 4.35-39p3) and the Spacewatch 1.8m telescope (Sept. 5.39-40p3)
K08M01R 2008 MR1 (arc=3 opp, H=18.4 ~708m) from LINEAR (Sept. 5.33-38p5)
K08K28V 2008 KV28 (arc=97 days, H=20.3 ~295m) from Spacewatch 1.8m (Sept. 5.14-15p3 at V=22.5)
K08E97Z 2008 EZ97 (arc=166 days, H=17.9 ~891m) from the Siding Spring Survey (SSS) (Aug. 28.64-68p4)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.8 ~1.48 km) from LINEAR (Sept. 5.33-38p5)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from PJMSO (Sept. 6.20-21p5)
K03R00M 2003 RM (Q=4.673 AU, arc=2 opp, H=20.0 ~339m) from PJMSO (Sept. 6.22p5)
K00F10J 2000 FJ10 (arc=4 opp, H=21.3 ~186m) from LINEAR (Sept. 5.26-31p5)
K00CA1O 2000 CO101 (arc=2 opp, H=19.2 ~490m) from Astronomical Research Obs. (ARO) (Aug. 31.42p2)
J99R27J 1999 RJ27 (arc=2 opp, H=19.5 ~426m) from Spacewatch 1.8m (Sept. 5.32-33p2)
J98S00O 1998 SO (q=0.220 AU, arc=2 opp, H=20.6 ~257m) from LINEAR (Sept. 5.28-32p4)
J0135 190135 2005 QE30 from LINEAR (Sept. 5.20-25p5) and PJMSO (Sept. 6.23p5)
I9700 189700 2001 TA45 from PJMSO (Sept. 6.11-12p5)
G4400 164400 2005 GN59 from PJMSO (Sept. 6.13-15p5)
G2149 162149 1998 YQ11 from ARO (Sept. 3.31-33p3)
A5140 105140 2000 NL10 from Ametlla del Valles Obs. (Sept. 2.07-08p4)
96744 96744 1999 OW3 from La Sagra Obs. (Sept. 5.10-13p3)
90403 90403 2003 YE45 from PJMSO (Sept. 6.08-09p5)
88188 88188 2000 XH44 from Spacewatch 0.9m (Sept. 5.44-48p3)
66146 66146 1998 TU3 from Taurus-1 Obs. (Sept. 4.05-07p5)
66063 66063 1998 RO1 from LINEAR (Sept. 5.39-44p5)
66008 66008 1998 QH2 from PJMSO (Sept. 6.09-10p5)
65690 65690 1991 DG from PJMSO (Sept. 6.10p5)
16960 16960 1998 QS52 from Kiev Comet Station (Sept. 4.03-05p5)
08567 8567 1996 HW1 from Kiev Comet Station (Sept. 3.99-01p17), LINEAR (Sept. 5.26-31p5), and PJMSO (Sept. 6.22-23p5)
06611 6611 1993 VW from LINEAR (Sept. 5.19-25p4)
05731 5731 Zeus (1988 VP4) from LINEAR (Sept. 5.21-25p4)
05143 5143 Heracles (1991 VL) from LINEAR (Sept. 5.26-31p5)
04183 4183 Cuno (1959 LM) from LINEAR (Sept. 5.27-32p5)
01916 1916 Boreas (1953 RA) from LINEAR (Sept. 5.33-39p5)
01865 1865 Cerberus (1971 UA) from LINEAR (Sept. 5.32-38p5)

Observers on 6 September '08

Eleven observing facilities appear in today's MPEC.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-R31 -- 105140
`H55`	Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-R31 -- 2000 CO101, 162149
`585`	Kiev Comet Station in the Ukraine, 2 in MPEC 2008-R31 -- 16960, 8567
`704`	LINEAR in New Mexico, 13 in MPEC 2008-R31 -- 2008 MR1, 2006 WZ2, 2000 FJ10, 1998 SO, 66063, 190135, 8567, 6611, 5731, 5143, 4183, 1916, 1865
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2008-R31 -- 96744
`474`	Mt. John Obs. in New Zealand, 3 in MPEC 2008-R31 -- 2008 RW, 2008 RV, 2008 QS11
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2008-R31 -- 2005 TZ51, 2003 RM, 1998 SD9, 90403, 66008, 65690, 190135, 189700, 164400, 8567
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-R31 -- 2008 EZ97
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-R31 -- 2008 QZ, 2008 OQ8, 88188
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2008-R31 -- 2008 QZ, 2008 KV28, 1999 RJ27
`A98`	Taurus-1 Obs. in Belarus, 1 in MPEC 2008-R31 -- 66146

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 6 September '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2356 and JPL at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is 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

2008 RJ1	NEODyS	1348	2010-2086	39	5.28e-09	-3.85	-4.18	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/09/04.405 to 2008/09/05.440."

2008 RH1	NEODyS	1348	2016-2089	19	1.42e-07	-5.24	-5.46	0	NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/09/04.350 to 2008/09/05.350."

2008 RG1	NEODyS	1348	2013-2090	99	1.2e-07	-4.36	-5.11	0	NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/09/04.264 to 2008/09/05.415."

2008 RV	JPL Sentry	1348	R E M O V E D						JPL: Risk listing removed at 0850 UTC.

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 6 September '08

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

1348

Noted that NEODyS has posted 2008 RG1 as an impact risk - see above
Noted that NEODyS has posted 2008 RH1 as an impact risk - see above
Noted that NEODyS has posted 2008 RJ1 as an impact risk - see above
Noted that JPL Sentry has removed 2008 RV as an impact risk - see above
Grabbed MPEC 2008-R31 - Daily Orbit Update - see above

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