2008-08-08 Tracking News

Contents on 8 August '08

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- six MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- two 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 8 August '08

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2334 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." The Tracking News counted a total of six objects listed on the NEOCP at some point on this day.

New MPECs on 8 August '08

Minor Planet Electronic Circulars

There were six MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-P36 time-stamped "03:21 UT" - 2007 RT12 - see below
MPEC 2008-P37 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-P38 time-stamped "11:16 UT" - 2008 PH9 - see below
MPEC 2008-P39 time-stamped "11:19 UT" - 2008 PJ9 - see below
MPEC 2008-P40 time-stamped "15:54 UT" - 2008 PK9 - see below
MPEC 2008-P41 time-stamped "20:55 UT" - 2006 UG185 = 1996 AV10

MPEC 2008-P41 - "20:55 UT" - 2006 UG185 = 1996 AV10

K06UI5G 2006 UG185 from the Mt. Lemmon Survey (MLS) (2006 Nov. 15.43-45p4 & 2007 Feb. 6.40-42p4), the Spacewatch 0.9m telescope (2007 Jan. 17.36-39p3 & 2007 Jan. 26.33-37p3), and the Catalina Sky Survey (CSS) (March 13.32-35p4)

MPEC 2008-P40 - "15:54 UT" - 2008 PK9

K08P09K 2008 PK9 (risk-listed, Earth MOID=2.1 LD, H=23.1 ~81m) was discovered at 1103 UT on 8 Aug. by the Siding Spring Survey (SSS), which observed it at Aug. 8.46-52p9 and 8.59-62p6.

MPEC 2008-P39 - "11:19 UT" - 2008 PJ9

K08P09J 2008 PJ9 (risk-listed, Q=4.119 AU, Earth MOID=3.9 LD, H=21.6 ~162m) was discovered at 1414 UT on 6 Aug. by SSS, which observed it at Aug. 6.59-62p4, 6.72p1, and 6.80p1. The discovery was confirmed by Eschenberg Obs. (Aug. 7.01p3), Astronomical Research Obs. (ARO) (Aug. 8.34-35p3), and Sandlot Obs. (Aug. 8.37p3).

MPEC 2008-P38 - "11:16 UT" - 2008 PH9

K08P09H 2008 PH9 (i=43.4°, Q=4.796 AU, H=15.7 ~2.45 km, q=1.387 AU) was discovered at 1413 UT on 6 Aug. by SSS, which observed it at Aug. 6.59-62p4, 6.72p2, and 6.82p1. The discovery was confirmed by Vallemare di Borbona Obs. (Aug. 8.02-03p3), Sandlot Obs. (Aug. 8.33-35p3), and ARO (Aug. 8.34-35p2).

<< DOU on 8 Aug. '08 >> MPEC 2008-P37 - "06:09 UT" - Daily Orbit Update

Observations of small asteroids (H>22.0)
K08P02G 2008 PG2 (arc=4 days, H=22.8 ~93m) from Tiki Obs. (Aug. 7.29-32p2)
K08O00M 2008 OM (arc=13 days, H=22.4 ~112m) from Jurassien-Vicques Obs. (Aug. 6.90p2)
Observations of other objects
K08P07G 2008 PG7 (i=39.9°, arc=1 day, H=21.4 ~178m) from Modra Obs. (Aug. 7.89p1)
K08P03L 2008 PL3 (arc=3 days, H=19.3 ~467m) from Hibiscus Obs. (Aug. 7.29-31p2)
K08O09S 2008 OS9 (arc=14 days, H=19.2 ~490m) from Siegen Obs. (Aug. 7.00-01p3) and Thompsonville Obs. (Aug. 8.17p6)
K08N00U 2008 NU (Q=4.215 AU, arc=37 days, H=17.5 ~1.07 km) from Petit Jean Mtn. South Obs. (PJMSO) (Aug. 7.32-33p6)
K04S56B 2004 SB56 (arc=2 opp, H=19.3 ~467m) from PJMSO (Aug. 7.24p7) and Hamamatsu-Yuto Obs. (Aug. 7.50-52p6)
K03O04B 2003 OB4 (Q=4.516 AU, arc=2 opp, H=19.3 ~467m) from PJMSO (Aug. 7.23p6)
I9008 189008 1996 FR3 from Hibiscus Obs. (Aug. 6.60-61p2)
I8452 188452 2004 HE62 from Siegen Obs. (Aug. 6.93p3) and Thompsonville Obs. (Aug. 7.16p5 & 8.14-15p6)
G4400 164400 2005 GN59 from Thompsonville Obs. (Aug. 8.19p6)
65690 65690 1991 DG from Dresden Obs. (Aug. 6.87p2)
35107 35107 1991 VH from Siegen Obs. (Aug. 6.92p3)
11398 11398 1998 YP11 from Thompsonville Obs. (Aug. 8.16p6)
08567 8567 1996 HW1 from Siegen Obs. (Aug. 6.98p3), McCarthy Obs. (Aug. 8.17-20p3), and Thompsonville Obs. (Aug. 8.22p6)
04179 4179 Toutatis (1989 AC) from Thompsonville Obs. (Aug. 8.18p6)

MPEC 2008-P36 - "03:21 UT" - 2007 RT12

K07R12T 2007 RT12 (small asteroid, H=23.8 ~59m) from Great Shefford Obs. (Aug. 3.94p3 & 7.94-96p2)

Observers on 8 August '08

Nineteen observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2008-P38 & 2008-P39 -- 2008 PJ9, 2008 PH9
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2008-P41 -- 2006 UG185
`639`	Dresden Obs. in Germany, 1 in MPEC 2008-P37 -- 65690
`151`	Eschenberg Obs. in Switzerland, 1 in MPEC 2008-P39 -- 2008 PJ9
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-P36 -- 2007 RT12
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-P37 -- 2004 SB56
`F84`	Hibiscus Obs. in Tahiti, 2 in MPEC 2008-P37 -- 2008 PL3, 189008
`185`	Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2008-P37 -- 2008 OM
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2008-P37 -- 8567
`118`	Modra Obs. in Slovakia, 1 in MPEC 2008-P37 -- 2008 PG7
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-P41 -- 2006 UG185
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-P37 -- 2008 NU, 2004 SB56, 2003 OB4
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2008-P38 & 2008-P39 -- 2008 PJ9, 2008 PH9
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-P38, 2008-P39 & 2008-P40 -- 2008 PK9, 2008 PJ9, 2008 PH9
`510`	Siegen Obs. in Germany, 4 in MPEC 2008-P37 -- 2008 OS9, 35107, 188452, 8567
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-P41 -- 2006 UG185
`H53`	Thompsonville Obs. in Illinois, 6 in MPEC 2008-P37 -- 2008 OS9, 188452, 164400, 11398, 8567, 4179
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-P37 -- 2008 PG2
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-P38 -- 2008 PH9

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

Impact Risk Monitoring on 8 August '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2334 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 PK9	JPL Sentry	1900	2035-2097	94	2.4e-06	-4.44	-5.52	0	JPL: "Analysis based on 15 observations spanning .16255 days (2008-Aug-08.46082 to 2008-Aug-08.62337)." Diameter approximately 0.076 km. from mean, weighted H=23.3.

2008 PJ9	JPL Sentry	1409	2051-2071	6	6.4e-07	-4.58	-4.67	0	JPL: "Analysis based on 15 observations spanning 1.7795 days (2008-Aug-06.59348 to 2008-Aug-08.373)." Diameter approximately 0.160 km. from mean, weighted H=21.6.

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 8 August '08

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

0229 8/9	Grabbed MPEC 2008-P41 - 2006 UG185 = 1996 AV10 - see above
1900	Noted that JPL Sentry has posted 2008 PK9 as an impact risk - see above
1701	Grabbed MPEC 2008-P40 - 2008 PK9 - see above
1409	Noted that JPL Sentry has posted 2008 PJ9 as an impact risk - see above Grabbed MPEC 2008-P37 - Daily Orbit Update - see above Grabbed MPEC 2008-P38 - 2008 PH9 - see above Grabbed MPEC 2008-P39 - 2008 PJ9 - see above
0356	Grabbed MPEC 2008-P36 - 2007 RT12 - see above

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