2008-08-03 Tracking News

Contents on 3 August '08

IAU Minor Planet Center
- NEOCP Activity -- nine listings: 2 new, 7 updated
- New MPECs -- three MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- three objects
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 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 3 August '08

The MPC's NEO Confirmation Page has 9 listings: 2 new, 7 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and seven updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of ten 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 3 August '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-P07 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-P08 time-stamped "17:09 UT" - Comet C/2008 L3 (Hill) - see below
MPEC 2008-P09 time-stamped "22:39 UT" - 2007 RT15

MPEC 2008-P09 - "22:39 UT" - 2007 RT15

K07R15T 2007 RT15 (KBO, q=30.338 AU, Q=48.488 AU, H=6.9 ~141 km) from Mt. Palomar (2003 Oct. 22.23p1, 2003 Oct. 22.29p1, 2003 Oct. 22.35p1, July 31.41p1, Aug. 2.40p1 & 3.40p1)

MPEC 2008-P08 - "17:09 UT" - Comet C/2008 L3 (Hill)

CK08L030 C/2008 L3 (Hill) (i=100.2°, q=2.011 AU, Q=503.674 AU, TP=2008 Apr. 22.3613 TT) from Schiaparelli Obs. (June 23.95-99p2), Chante-Perdrix Obs. (July 20.88p1), the Mt. Lemmon Survey (MLS) (July 29.17-19p4), and Astronomical Research Obs. (ARO) (Aug. 1.09-11p3 & 3.09-12p4)

<< DOU on 3 Aug. '08 >> MPEC 2008-P07 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08O07S 2008 OS7 (arc=4 days, H=20.4 ~282m) from ARO (Aug. 2.19-20p5), Hibiscus Obs. (Aug. 2.26-27p2), Stia Obs. (Aug. 2.84-86p4), and Thompsonville Obs. (Aug. 3.18-19p6)
K08O01O 2008 OO1 (small asteroid, arc=7 days, H=24.6 ~41m) from ARO (Aug. 2.26-28p4)
K08O00O 2008 OO (arc=7 days, H=19.8 ~371m) from ARO (Aug. 2.24p2), Desert Moon Obs. (Aug. 2.25p2), and Hibiscus Obs. (Aug. 2.33-35p2)
Observations of recently (no longer) risk-listed objects
K08O08O 2008 OO8 (small asteroid, arc=3 days, H=25.2 ~31m) from ARO (Aug. 2.31-32p3)
K08O07T 2008 OT7 (small asteroid, arc=3 days, H=27.2 ~12m) from the Siding Spring Survey (SSS) (Aug. 2.61-62p3)
K08O02X 2008 OX2 (arc=5 days, H=19.9 ~355m) from ARO (Aug. 2.21-23p4)
K08N03Q 2008 NQ3 (arc=19 days, H=20.3 ~295m) from SSS (Aug. 2.73-74p2)
Observations of small asteroids (H>22.0)
K08O10N 2008 ON10 (arc=3 days, H=24.6 ~41m) from Great Shefford Obs. (Aug. 2.97-98p3)
K08O09C 2008 OC9 (arc=3 days, H=23.3 ~74m) from SSS (Aug. 2.63p7), Great Shefford Obs. (Aug. 2.90-91p3), and Montcabre Obs. (Aug. 2.90-92p3)
K08M01Q 2008 MQ1 (arc=33 days, H=24.2 ~49m) from Desert Moon Obs. (Aug. 2.33-39p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08O08M 2008 OM8 (arc=3 days, H=21.8 ~148m) from ARO (Aug. 2.24p4)
Observations of other objects
K08O09S 2008 OS9 (arc=9 days, H=19.2 ~490m) from Baldone Obs. (July 30.93-95p2 & 30.99p1), Thompsonville Obs. (Aug. 2.19-20p6 & 3.16p6), and Peschiera del Garda Obs. (Aug. 2.99-02p3)
K08O08X 2008 OX8 (arc=3 days, H=21.5 ~170m) from SSS (Aug. 2.50p1)
K08O02V 2008 OV2 (arc=5 days, H=20.3 ~295m) from ARO (Aug. 2.19-20p4)
K08O01X 2008 OX1 (arc=8 days, H=21.5 ~170m) from ARO (Aug. 2.20-21p4) and Thompsonville Obs. (Aug. 3.17p4)
K08M01U 2008 MU1 (i=40.8°, arc=33 days, H=19.8 ~371m) from ARO (Aug. 2.18p2) and Peschiera del Garda Obs. (Aug. 2.89-94p3)
K08L16Q 2008 LQ16 (arc=49 days, H=20.3 ~295m) from ARO (Aug. 2.15-16p2)
K08L16N 2008 LN16 (arc=53 days, H=19.9 ~355m) from SSS (Aug. 2.64-65p2)
K08L08W 2008 LW8 (arc=54 days, H=17.3 ~1.17 km) from LINEAR (Aug. 2.39-43p4)
K08J35T 2008 JT35 (Q=4.082 AU, arc=89 days, H=21.3 ~186m) from Desert Moon Obs. (Aug. 2.28-30p3)
K08E32B 2008 EB32 (arc=145 days, H=19.3 ~467m) from ARO (Aug. 2.13-15p3)
K05T45U 2005 TU45 (arc=3 opp, H=17.2 ~1.23 km) from Peschiera del Garda Obs. (July 7.93-94p3)
K03O04B 2003 OB4 (Q=4.516 AU, arc=2 opp, H=19.2 ~490m) from Ametlla del Valles Obs. (July 31.97-98p3)
K01XQ6W 2001 XW266 (arc=3 opp, H=19.5 ~426m) from Ametlla del Valles Obs. (July 31.99p3)
K01W25A 2001 WA25 (arc=3 opp, H=18.7 ~616m) from Desert Moon Obs. (Aug. 2.13-16p3)
K01L00C 2001 LC (q=0.340 AU, arc=3 opp, H=19.1 ~513m) from Hibiscus Obs. (Aug. 2.58-61p2)
I8452 188452 2004 HE62 from Linceo Obs. (Aug. 1.87-88p3) and Thompsonville Obs. (Aug. 2.23-24p6)
G4400 164400 2005 GN59 from El Guijo Obs. (Aug. 3.07-10p3)
F4278 154278 2002 TB9 from Ametlla del Valles Obs. (July 31.91-92p3)
E2563 142563 2002 TR69 from SSS (Aug. 2.66-69p3)
85839 85839 1998 YO4 from SSS (Aug. 2.48-49p3)
65690 65690 1991 DG from Ametlla del Valles Obs. (July 31.91p3)
35107 35107 1991 VH from Vitebsk Obs. (July 31.82-84p5 & Aug. 1.83p4) and Ametlla del Valles Obs. (July 31.88p4)
11398 11398 1998 YP11 from Ametlla del Valles Obs. (July 31.99-00p4), Linceo Obs. (Aug. 1.92p3), LINEAR (Aug. 2.21-26p5), and Thompsonville Obs. (Aug. 2.21-22p6 & 3.13p6)
08567 8567 1996 HW1 from Vitebsk Obs. (July 31.93-94p6), Ametlla del Valles Obs. (Aug. 1.01p4), Thompsonville Obs. (Aug. 2.20p6 & 3.13-14p6), and El Guijo Obs. (Aug. 3.02-04p3)
04257 4257 Ubasti (1987 QA) from Ametlla del Valles Obs. (Aug. 1.02-04p4)
04179 4179 Toutatis (1989 AC) from Thompsonville Obs. (Aug. 2.21p6 & 3.20-21p6)
01917 1917 Cuyo (1968 AA) from El Guijo Obs. (Aug. 2.00-01p3)
01620 1620 Geographos (1951 RA) from El Guijo Obs. (Aug. 3.11-13p3)

Observers on 3 August '08

Nineteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 8 in MPEC 2008-P07 -- 2003 OB4, 2001 XW266, 65690, 35107, 154278, 11398, 8567, 4257
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPECs 2008-P07 & 2008-P08 -- 2008 OX2, 2008 OX1, 2008 OV2, 2008 OS7, 2008 OO8, 2008 OO1, 2008 OO, 2008 OM8, 2008 MU1, 2008 LQ16, C/2008 L3, 2008 EB32
`069`	Baldone Obs. in Latvia, 1 in MPEC 2008-P07 -- 2008 OS9
`A77`	Chante-Perdrix Obs. in France, 1 in MPEC 2008-P08 -- C/2008 L3
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-P07 -- 2008 OO, 2008 MQ1, 2008 JT35, 2001 WA25
`J27`	El Guijo Obs. in Spain, 4 in MPEC 2008-P07 -- 164400, 8567, 1917, 1620
`J95`	Great Shefford Obs. in England, 2 in MPEC 2008-P07 -- 2008 ON10, 2008 OC9
`F84`	Hibiscus Obs. in Tahiti, 3 in MPEC 2008-P07 -- 2008 OS7, 2008 OO, 2001 LC
`704`	LINEAR in New Mexico, 2 in MPEC 2008-P07 -- 2008 LW8, 11398
`J59`	Linceo Obs. in Spain, 2 in MPEC 2008-P07 -- 188452, 11398
`213`	Montcabre Obs. in Spain, 1 in MPEC 2008-P07 -- 2008 OC9
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-P08 -- C/2008 L3
`675`	Mt. Palomar in southern California, 1 in MPEC 2008-P09 -- 2007 RT15
`A53`	Peschiera del Garda Obs. in Italy, 3 in MPEC 2008-P07 -- 2008 OS9, 2008 MU1, 2005 TU45
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2008-P08 -- C/2008 L3
`E12`	Siding Spring Survey (SSS) in New South Wales, 7 in MPEC 2008-P07 -- 2008 OX8, 2008 OT7, 2008 OC9, 2008 NQ3, 2008 LN16, 85839, 142563
`A78`	Stia Obs. in Italy, 1 in MPEC 2008-P07 -- 2008 OS7
`H53`	Thompsonville Obs. in Illinois, 7 in MPEC 2008-P07 -- 2008 OX1, 2008 OS9, 2008 OS7, 188452, 11398, 8567, 4179
`B42`	Vitebsk Obs. in Belarus, 2 in MPEC 2008-P07 -- 35107, 8567

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

Impact Risk Monitoring on 3 August '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2357 and JPL at 2358 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 OS7	JPL Sentry	1419	R E M O V E D						JPL: Risk listing removed at 0852 UTC.

2008 OO1	JPL Sentry	1419	2107	1	3.0e-07	-6.61	-6.61	0	JPL: "Analysis based on 32 observations spanning 6.7255 days (2008-Jul-26.55201 to 2008-Aug-02.27749)." Diameter approximately 0.040 km. from mean, weighted H=24.6.

2008 OO	JPL Sentry	1419	2075-2100	4	4.7e-07	-3.83	-4.02	0	JPL: "Analysis based on 74 observations spanning 7.2557 days (2008-Jul-26.09211 to 2008-Aug-02.34784)." Diameter approximately 0.373 km. from mean, weighted H=19.8.
2008 OO	NEODyS	1419	2075	1	2.89e-09	-5.94	-5.94	0	NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2008/07/26.093 to 2008/08/02.349."

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 3 August '08

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

2259	Grabbed MPEC 2008-P09 - 2007 RT15 - see above
1737	Grabbed MPEC 2008-P08 - Comet C/2008 L3 (Hill) - see above
1419	Noted that JPL Sentry has updated its 2008 OO risk assessment - see above Noted that NEODyS has updated its 2008 OO risk assessment - see above Noted that JPL Sentry has updated its 2008 OO1 risk assessment - see above Noted that JPL Sentry has removed 2008 OS7 as an impact risk - see above Grabbed MPEC 2008-P07 - Daily Orbit Update - see above

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