2008-08-06 Tracking News

Contents on 6 August '08

IAU Minor Planet Center
- NEOCP Activity -- two listings: 1 new, 1 updated
- New MPECs -- three MPECs
Observers -- eighteen observing facilities
Impact Risk Monitoring -- five 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 6 August '08

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." So far The Tracking News has counted a total of three 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 6 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-P31 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-P32 time-stamped "14:12 UT" - 2008 PW4 - see below
MPEC 2008-P33 time-stamped "21:53 UT" - Comets C/2008 M4, 2008 M5, 2008 M6, 2008 M7, 2008 O1 (SOHO)

MPEC 2008-P33 - "21:53 UT" - Comets C/2008 M4, 2008 M5, 2008 M6, 2008 M7, 2008 O1 (SOHO)

K08O010 2008 O1 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (July 31.51-78p24, 31.82-85p4, 31.89-93p6, 31.97-03p8, Aug. 1.07p2, 1.11-28p18, 1.32-35p4 & 1.39p2)
K08M070 2008 M7 from the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (June 28.83-93p16)
K08M060 2008 M6 from SOHO C2 (June 27.83-96p18)
K08M050 2008 M5 from SOHO C2 (June 25.93-09p20)
K08M040 2008 M4 from SOHO C2 (June 25.28-42p20)

MPEC 2008-P32 - "14:12 UT" - 2008 PW4

K08P04W 2008 PW4 (risk-listed, Earth MOID=1.6 LD, H=22.2 ~123m) was discovered at 1323 UT on 5 Aug. by the Siding Spring Survey (SSS), which observed it at Aug. 5.56-59p4, 5.80p1, and 6.50p1. The discovery was confirmed by Cristovao Jacques via RAS Obs. Moorook (Aug. 5.64-65p3) and Eschenberg Obs. (Aug. 5.97p7).

<< DOU on 6 Aug. '08 >> MPEC 2008-P31 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08P03K 2008 PK3 (almost small, arc=2 days, H=22.0 ~135m) from SSS (Aug. 5.53p2 & 5.79p2)
K08P03H 2008 PH3 (arc=2 days, H=21.6 ~162m) from SSS (Aug. 5.55p2 & 5.80p2)
K08O08Q 2008 OQ8 (almost small, arc=4 days, H=22.0 ~135m) from Astronomical Research Obs. (ARO) (Aug. 3.30-31p3)
K08O01O 2008 OO1 (small asteroid, arc=8 days, H=24.6 ~41m) from ARO (Aug. 3.19-22p4)
Observations of recently (no longer) risk-listed objects
K08O08P 2008 OP8 (arc=5 days, H=19.6 ~407m) from ARO (Aug. 3.28-29p4)
K08O08O 2008 OO8 (small asteroid, arc=5 days, H=25.2 ~31m) from ARO (Aug. 3.25-27p3)
K08O07S 2008 OS7 (arc=7 days, H=20.4 ~282m) from Eschenberg Obs. (Aug. 5.88-89p3)
K08O02X 2008 OX2 (arc=8 days, H=19.8 ~371m) from Naef Obs. (Aug. 5.87-91p3) and Eschenberg Obs. (Aug. 5.87p2)
Observations of small asteroids (H>22.0)
K08P02G 2008 PG2 (arc=2 days, H=22.8 ~93m) from SSS (Aug. 5.45p2 & 5.77-78p4)
K08O10N 2008 ON10 (arc=4 days, H=24.8 ~37m) from ARO (Aug. 3.19p5)
K08O09C 2008 OC9 (arc=4 days, H=23.4 ~71m) from SSS (Aug. 2.63p1)
K08O06A 2008 OA6 (arc=5 days, H=22.7 ~98m) from ARO (Aug. 3.23-24p3)
K08O00M 2008 OM (arc=9 days, H=22.4 ~112m) from ARO (Aug. 3.17-18p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08O08M 2008 OM8 (arc=5 days, H=22.0 ~135m) from ARO (Aug. 3.24-25p4)
Observations of other objects
K08P03L 2008 PL3 (arc=1 day, H=19.3 ~467m) from SSS (Aug. 5.78p1)
K08P03J 2008 PJ3 (arc=2 days, H=20.4 ~282m) from SSS (Aug. 5.54p2 & 5.79p2)
K08O09S 2008 OS9 (arc=12 days, H=19.2 ~490m) from Petit Jean Mtn. South Obs. (PJMSO) (Aug. 5.20p7) and Atlante Obs. (Aug. 6.05-06p3)
K08O08X 2008 OX8 (arc=6 days, H=21.5 ~170m) from SSS (Aug. 5.42p2)
K08O01X 2008 OX1 (arc=10 days, H=21.5 ~170m) from Ametlla del Valles Obs. (Aug. 4.03-08p5), PJMSO (Aug. 5.13-14p7), McCarthy Obs. (Aug. 5.24-25p2), Eschenberg Obs. (Aug. 5.86p3), and Naef Obs. (Aug. 5.90p2)
K08O00N 2008 ON (arc=11 days, H=20.2 ~309m) from Tiki Obs. (Aug. 5.37-38p2)
K08N00U 2008 NU (Q=4.215 AU, arc=35 days, H=17.5 ~1.07 km) from ARO (Aug. 3.33-34p4), McCarthy Obs. (Aug. 5.20p1 & 5.26p1), and PJMSO (Aug. 5.33-34p6)
K08N00B 2008 NB (arc=33 days, H=19.1 ~513m) from ARO (Aug. 3.36p2)
K08M01U 2008 MU1 (i=40.8°, arc=34 days, H=19.8 ~371m) from Ametlla del Valles Obs. (Aug. 3.96-98p10)
K08M01R 2008 MR1 (arc=34 days, H=18.5 ~676m) from ARO (Aug. 3.32-33p4)
K08K05Z 2008 KZ5 (arc=66 days, H=20.0 ~339m) from ARO (Aug. 3.16p3)
K08J30Z 2008 JZ30 (arc=81 days, H=18.5 ~676m) from ARO (Aug. 3.35-36p3)
K08J26R 2008 JR26 (arc=82 days, H=19.8 ~371m) from ARO (Aug. 3.14-15p3)
K08B02S 2008 BS2 (arc=2 opp, H=18.2 ~776m) from the Sloan Digital Sky Survey (SDSS) (2003 Dec. 21.31p2 at V=21.50-22.46)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from PJMSO (Aug. 5.29-30p5)
K05R34C 2005 RC34 (arc=2 opp, H=19.7 ~389m) from PJMSO (Aug. 5.32-33p5) and Stia Obs. (Aug. 5.86-87p4)
K04X44N 2004 XN44 (arc=2 opp, H=18.4 ~708m) from PJMSO (Aug. 5.35p5)
K03R00M 2003 RM (Q=4.675 AU, arc=2 opp, H=20.2 ~309m) from Leura Obs. (Aug. 4.58-59p3)
K03O04B 2003 OB4 (Q=4.516 AU, arc=2 opp, H=19.2 ~490m) from Ametlla del Valles Obs. (Aug. 3.97-00p5) and McCarthy Obs. (Aug. 6.12-14p3)
K03L06O 2003 LO6 (Q=4.585 AU, arc=3 opp, H=16.9 ~1.41 km) from PJMSO (Aug. 5.27-29p5)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Alter Satzberg Obs. (Aug. 5.91-93p6)
K01T45A 2001 TA45 (arc=4 opp, H=19.1 ~513m) from Ametlla del Valles Obs. (Aug. 4.12p4) and PJMSO (Aug. 5.17-18p5)
K01R17T 2001 RT17 (q=0.264 AU, arc=5 opp, H=18.0 ~851m) from Hibiscus Obs. (Aug. 5.62-64p2)
K00R77L 2000 RL77 (arc=5 opp, H=16.8 ~1.48 km) from Ametlla del Valles Obs. (Aug. 4.13p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from Balzaretto Obs. (Aug. 4.82-84p3) and McCarthy Obs. (Aug. 6.08-09p3)
H4050 174050 2002 CC19 from Ametlla del Valles Obs. (Aug. 3.96-97p4) and Mirasteilas Obs. (Aug. 5.92-93p3)
G4400 164400 2005 GN59 from PJMSO (Aug. 5.23-24p6) and Atlante Obs. (Aug. 6.02-03p3)
F4278 154278 2002 TB9 from Ametlla del Valles Obs. (Aug. 3.93p4)
A5140 105140 2000 NL10 from Mirasteilas Obs. (Aug. 5.94-96p3)
65690 65690 1991 DG from Ametlla del Valles Obs. (Aug. 3.99p4) and McCarthy Obs. (Aug. 6.09-11p3)
11398 11398 1998 YP11 from Stia Obs. (Aug. 5.82-83p4) and Eschenberg Obs. (Aug. 5.83p7)
08567 8567 1996 HW1 from Ametlla del Valles Obs. (Aug. 4.09-12p4), PJMSO (Aug. 5.18-19p5), Eschenberg Obs. (Aug. 5.84-85p7), and Naef Obs. (Aug. 5.87-90p2)
04257 4257 Ubasti (1987 QA) from Ametlla del Valles Obs. (Aug. 4.10-13p6)
01917 1917 Cuyo (1968 AA) from Ametlla del Valles Obs. (Aug. 4.17p4) and Mirasteilas Obs. (Aug. 6.03-04p3)

Observers on 6 August '08

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2008-P31 -- 2003 GW
`B37`	Ametlla del Valles Obs. in Spain, 11 in MPEC 2008-P31 -- 2008 OX1, 2008 MU1, 2003 OB4, 2001 TA45, 2000 RL77, 65690, 174050, 154278, 8567, 4257, 1917
`H55`	Astronomical Research Obs. (ARO) in Illinois, 14 in MPEC 2008-P31 -- 2008 OQ8, 2008 OP8, 2008 OO8, 2008 OO1, 2008 ON10, 2008 OM8, 2008 OM, 2008 OA6, 2008 NU, 2008 NB, 2008 MR1, 2008 KZ5, 2008 JZ30, 2008 JR26
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2008-P31 -- 2008 OS9, 164400
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2008-P31 -- 1994 AW1
`151`	Eschenberg Obs. in Switzerland, 6 in MPECs 2008-P31 & 2008-P32 -- 2008 PW4, 2008 OX2, 2008 OX1, 2008 OS7, 11398, 8567
`F84`	Hibiscus Obs. in Tahiti, 1 in MPEC 2008-P31 -- 2001 RT17
`E17`	Leura Obs. in New South Wales, 1 in MPEC 2008-P31 -- 2003 RM
`932`	McCarthy Obs. in Connecticut, 5 in MPEC 2008-P31 -- 2008 OX1, 2008 NU, 2003 OB4, 1994 AW1, 65690
`B67`	Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-P31 -- 174050, 105140, 1917
`A13`	Naef Obs. in Switzerland, 3 in MPEC 2008-P31 -- 2008 OX2, 2008 OX1, 8567
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2008-P31 -- 2008 OX1, 2008 OS9, 2008 NU, 2005 TZ51, 2005 RC34, 2004 XN44, 2003 LO6, 2001 TA45, 164400, 8567
`D90.`	Cristovao Jacques in Brazil via RAS Obs. Moorook in South Australia, 1 in MPEC 2008-P32 -- 2008 PW4
`E12`	Siding Spring Survey (SSS) in New South Wales, 8 in MPECs 2008-P31 & 2008-P32 -- 2008 PW4, 2008 PL3, 2008 PK3, 2008 PJ3, 2008 PH3, 2008 PG2, 2008 OX8, 2008 OC9
`645`	Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2008-P31 -- 2008 BS2
`2492`	LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPEC 2008-P33 -- C/2008 M7, C/2008 M6, C/2008 M5, C/2008 M4
`2493`	LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2008-P33 -- C/2008 O1
`A78`	Stia Obs. in Italy, 2 in MPEC 2008-P31 -- 2005 RC34, 11398
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-P31 -- 2008 ON

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

Impact Risk Monitoring on 6 August '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS 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 PW4	JPL Sentry	1751	2024-2107	244	4.5e-06	-3.94	-4.44	0	JPL: "Analysis based on 16 observations spanning .93768 days (2008-Aug-05.55802 to 2008-Aug-06.4957)." Diameter approximately 0.120 km. from mean, weighted H=22.2.

2008 PK3	JPL Sentry	1451	R E M O V E D						JPL: Risk listing removed at 0851 UTC.

2008 PH3	JPL Sentry	1451	R E M O V E D						JPL: Risk listing removed at 0849 UTC.

2008 OQ8	NEODyS	1451	R E M O V E D						-
2008 OQ8	JPL Sentry	1451	R E M O V E D						JPL: Risk listing removed at 0849 UTC.

2008 OO1	JPL Sentry	1451	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 August '08

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

2215	Grabbed MPEC 2008-P33 - Comets C/2008 M4, 2008 M5, 2008 M6, 2008 M7, 2008 O1 (SOHO) - see above
1751	Noted that JPL Sentry has posted 2008 PW4 as an impact risk - see above The NEOCP has become active
1451	Noted that JPL Sentry has removed 2008 OO1 as an impact risk - see above Noted that JPL Sentry has removed 2008 OQ8 as an impact risk - see above Noted that NEODyS has removed 2008 OQ8 as an impact risk - see above Noted that JPL Sentry has removed 2008 PH3 as an impact risk - see above Noted that JPL Sentry has removed 2008 PK3 as an impact risk - see above Grabbed MPEC 2008-P31 - Daily Orbit Update - see above Grabbed MPEC 2008-P32 - 2008 PW4 - see above The NEOCP has become empty

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