2008-08-05 Tracking News

Contents on 5 August '08

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- seven MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- six 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 5 August '08

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of five 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 5 August '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-P24 time-stamped "04:02 UT" - 2008 PT1 - see below
MPEC 2008-P25 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2008-P26 time-stamped "13:09 UT" - 2008 PH3 - see below
MPEC 2008-P27 time-stamped "13:16 UT" - 2008 PJ3 - see below
MPEC 2008-P28 time-stamped "13:22 UT" - 2008 PK3 - see below
MPEC 2008-P29 time-stamped "13:25 UT" - 2008 PL3 - see below
MPEC 2008-P30 time-stamped "21:38 UT" - 2007 TU431, 2007 TV431

MPEC 2008-P30 - "21:38 UT" - 2007 TU431, 2007 TV431

K07Th1V 2007 TV431 (KBO, q=30.149 AU, Q=48.646 AU, H=9.4 ~44.6 km) was discovered at 1051 UT on 14 Oct. 2007 from Mauna Kea, where it was observed at 2007 Oct. 14.45p1 at R=23.8, 2007 Oct. 14.51p1 at R=23.9, and 2007 Oct. 14.58p1. The discovery was confirmed by Las Campanas Obs. (2007 Nov. 4.08-10p2) and Cerro Tololo Inter-American Obs. (CTIO) (2007 Dec. 6.14p1 & 2007 Dec. 7.05-08p2).
K07Th1U 2007 TU431 (q=21.426 AU, Q=231.856 AU, H=10.4 ~28.2 km) was discovered at 0612 UT on 14 Oct. 2007 from Mauna Kea, where it was observed at 2007 Oct. 14.26p1 at R=24.1, 2007 Oct. 14.32p1 at R=23.7, 2007 Oct. 14.38p1 at R=24.0, and 2007 Oct. 15.41p1. The discovery was confirmed by Las Campanas Obs. (2007 Nov. 3.04-06p2) and CTIO (2007 Dec. 7.06-08p2).

MPEC 2008-P29 - "13:25 UT" - 2008 PL3

K08P03L 2008 PL3 (H=19.3 ~467m) was discovered at 1329 UT on 4 Aug. by the Siding Spring Survey (SSS), which observed it at Aug. 4.56-61p4, 4.79p2, and 5.46-48p2.

MPEC 2008-P28 - "13:22 UT" - 2008 PK3

K08P03K 2008 PK3 (risk-listed, Earth MOID=0.2 LD, H=21.9 ~141m) was discovered at 1903 UT on 3 Aug. by SSS, which observed it at Aug. 3.79-83p6, 4.50p2, and 4.79p1.

MPEC 2008-P27 - "13:16 UT" - 2008 PJ3

K08P03J 2008 PJ3 (Q=5.175 AU, H=20.1 ~323m) was discovered at 1854 UT on 3 Aug. by SSS, which observed it at Aug. 3.79-81p4 and 4.50p1.

MPEC 2008-P26 - "13:09 UT" - 2008 PH3

K08P03H 2008 PH3 (risk-listed, H=21.7 ~155m) was discovered at 1631 UT on 3 Aug. by SSS, which observed it at Aug. 3.69-73p4, 3.82p1, and 4.51p1.

<< DOU on 5 Aug. '08 >> MPEC 2008-P25 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08P01F 2008 PF1 (small asteroid, arc=1 day, H=22.2 ~123m) from Astronomical Research Obs. (ARO) (Aug. 4.30-31p5) and LINEAR (Aug. 4.34-38p4)
K08O09B 2008 OB9 (Q=5.452 AU, arc=6 days, H=17.3 ~1.17 km) from ARO (Aug. 4.22-24p3)
K08O00O 2008 OO (arc=9 days, H=19.8 ~371m) from LINEAR (Aug. 4.23-26p4)
Observations of recently (no longer) risk-listed objects
K08O08O 2008 OO8 (small asteroid, arc=5 days, H=25.2 ~31m) from ARO (Aug. 4.31-34p4)
K08O07S 2008 OS7 (arc=5 days, H=20.4 ~282m) from ARO (Aug. 4.17-19p4) and LINEAR (Aug. 4.22-26p4)
K08O02X 2008 OX2 (arc=7 days, H=19.9 ~355m) from ARO (Aug. 4.20-23p3)
Observations of small asteroids (H>22.0)
K08P02G 2008 PG2 (arc=1 day, H=22.8 ~93m) from SSS (Aug. 4.73p1)
K08P01E 2008 PE1 (arc=3 days, H=24.3 ~47m) from ARO (Aug. 4.19p3)
K08O10N 2008 ON10 (arc=4 days, H=24.8 ~37m) from San Marcello Pistoiese Obs. (Aug. 3.90p4) and ARO (Aug. 4.24-25p4)
K08O09C 2008 OC9 (arc=4 days, H=23.4 ~71m) from Libbiano Obs. (Aug. 2.96-97p2) and ARO (Aug. 4.19-20p4)
K08O06A 2008 OA6 (arc=3 days, H=22.7 ~98m) from the Spacewatch 0.9m telescope (July 30.34-35p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08O08M 2008 OM8 (arc=5 days, H=21.8 ~148m) from ARO (Aug. 4.25-26p4)
Observations of other objects
K08O09S 2008 OS9 (arc=11 days, H=19.2 ~490m) from LINEAR (Aug. 4.27-29p3) and Atlante Obs. (Aug. 5.05p3)
K08O02V 2008 OV2 (arc=7 days, H=20.3 ~295m) from ARO (Aug. 4.25-26p3)
K08N00U 2008 NU (Q=4.218 AU, arc=34 days, H=17.5 ~1.07 km) from McCarthy Obs. (Aug. 4.20-21p3)
K08J24O 2008 JO24 (arc=86 days, H=18.6 ~645m) from ARO (Aug. 4.31-32p4)
K08J14Q 2008 JQ14 (arc=91 days, H=19.2 ~490m) from ARO (Aug. 4.13-15p4)
K08E97Z 2008 EZ97 (arc=140 days, H=17.9 ~891m) from SSS (Aug. 2.70-72p4)
K07X20J 2007 XJ20 (arc=3 opp, H=18.5 ~676m) from Leura Obs. (Aug. 4.60-61p3)
K05B00C 2005 BC (arc=2 opp, H=18.1 ~812m) from SSS (Aug. 4.43-47p4)
K04H12E 2004 HE12 (i=42.7°, arc=4 opp, H=17.7 ~977m) from ARO (Aug. 4.35-37p4)
K03R00M 2003 RM (Q=4.675 AU, arc=2 opp, H=20.1 ~323m) from Leura Obs. (Aug. 4.65-66p3)
K00R77L 2000 RL77 (arc=5 opp, H=16.8 ~1.48 km) from Crni Vrh Obs. (Aug. 4.05-08p4)
K00CA1T 2000 CT101 (arc=4 opp, H=20.7 ~245m) from ARO (Aug. 4.38-40p4)
I8452 188452 2004 HE62 from Santa Mama Obs. (Aug. 4.86-88p9) and Thompsonville Obs. (Aug. 5.16p6)
90403 90403 2003 YE45 from Taurus-1 Obs. (Aug. 3.85-90p13), Santa Mama Obs. (Aug. 4.89-91p9), and El Guijo Obs. (Aug. 4.96-97p3)
90075 90075 2002 VU94 from LINEAR (Aug. 4.41-44p4)
65690 65690 1991 DG from Santa Mama Obs. (Aug. 4.84-86p9) and El Guijo Obs. (Aug. 4.92-95p3)
35107 35107 1991 VH from Atlante Obs. (Aug. 4.92-93p3) and McCarthy Obs. (Aug. 5.06-07p3)
11398 11398 1998 YP11 from Atlante Obs. (Aug. 4.99p3) and Thompsonville Obs. (Aug. 5.17-18p6)
08567 8567 1996 HW1 from Atlante Obs. (Aug. 5.07-08p3) and Thompsonville Obs. (Aug. 5.20-21p6)
07889 7889 1994 LX from Thompsonville Obs. (Aug. 5.16-17p6)
07888 7888 1993 UC from LINEAR (Aug. 4.34-37p3)
05836 5836 1993 MF from SSS (Aug. 4.41-42p2)
05786 5786 Talos (1991 RC) from LINEAR (Aug. 4.35-38p3)
04179 4179 Toutatis (1989 AC) from LINEAR (Aug. 4.22-27p5), Atlante Obs. (Aug. 5.03p3), and Thompsonville Obs. (Aug. 5.18-19p6)

MPEC 2008-P24 - "04:02 UT" - 2008 PT1

K08P01T 2008 PT1 (Q=4.935 AU, H=17.2 ~1.23 km) was discovered at 0304 UT on 3 Aug. by La Sagra Obs., which observed it at Aug. 3.13-17p3 and 4.12-16p3. The discovery was confirmed by SSS (June 30.76-80p4) and Mallorca Obs. (Aug. 3.00-02p4, 4.14-15p3 & 5.13-14p3).

Observers on 5 August '08

Nineteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 14 in MPEC 2008-P25 -- 2008 PF1, 2008 PE1, 2008 OX2, 2008 OV2, 2008 OS7, 2008 OO8, 2008 ON10, 2008 OM8, 2008 OC9, 2008 OB9, 2008 JQ14, 2008 JO24, 2004 HE12, 2000 CT101
`J51`	Atlante Obs. in the Canary Islands, 5 in MPEC 2008-P25 -- 2008 OS9, 35107, 11398, 8567, 4179
`807`	Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2008-P30 -- 2007 TV431, 2007 TU431
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-P25 -- 2000 RL77
`J27`	El Guijo Obs. in Spain, 2 in MPEC 2008-P25 -- 90403, 65690
`704`	LINEAR in New Mexico, 8 in MPEC 2008-P25 -- 2008 PF1, 2008 OS9, 2008 OS7, 2008 OO, 90075, 7888, 5786, 4179
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2008-P24 -- 2008 PT1
`304`	Las Campanas Obs. in Chile, 2 in MPEC 2008-P30 -- 2007 TV431, 2007 TU431
`E17`	Leura Obs. in New South Wales, 2 in MPEC 2008-P25 -- 2007 XJ20, 2003 RM
`B33`	Libbiano Obs. in Italy, 1 in MPEC 2008-P25 -- 2008 OC9
`620`	Mallorca Obs. on Mallorca, 1 in MPEC 2008-P24 -- 2008 PT1
`568`	Mauna Kea in Hawaii, 2 in MPEC 2008-P30 -- 2007 TV431, 2007 TU431
`932`	McCarthy Obs. in Connecticut, 2 in MPEC 2008-P25 -- 2008 NU, 35107
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-P25 -- 2008 ON10
`B38`	Santa Mama Obs. in Italy, 3 in MPEC 2008-P25 -- 90403, 65690, 188452
`E12`	Siding Spring Survey (SSS) in New South Wales, 9 in MPECs 2008-P24, 2008-P25, 2008-P26, 2008-P27, 2008-P28 & 2008-P29 -- 2008 PT1, 2008 PL3, 2008 PK3, 2008 PJ3, 2008 PH3, 2008 PG2, 2008 EZ97, 2005 BC, 5836
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-P25 -- 2008 OA6
`A98`	Taurus-1 Obs. in Belarus, 1 in MPEC 2008-P25 -- 90403
`H53`	Thompsonville Obs. in Illinois, 5 in MPEC 2008-P25 -- 188452, 11398, 8567, 7889, 4179

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

Impact Risk Monitoring on 5 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 PK3	JPL Sentry	1541	2070-2076	3	2.3e-09	-7.06	-7.41	0	JPL: "Analysis based on 9 observations spanning .99878 days (2008-Aug-03.7944 to 2008-Aug-04.79318)." Diameter approximately 0.140 km. from mean, weighted H=21.9.

2008 PH3	JPL Sentry	1541	2021-2104	44	1.8e-08	-5.83	-6.66	0	JPL: "Analysis based on 6 observations spanning .82182 days (2008-Aug-03.68863 to 2008-Aug-04.51045)." Diameter approximately 0.194 km. from mean, weighted H=21.3.

2008 PF1	JPL Sentry	1541	2018-2097	15	4.5e-09	-6.64	-7.30	0	JPL: "Analysis based on 34 observations spanning 1.1024 days (2008-Aug-03.27394 to 2008-Aug-04.37636)." Diameter approximately 0.129 km. from mean, weighted H=22.1.
2008 PF1	NEODyS	1541	2016-2037	6	2.25e-09	-6.80	-7.37	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/08/03.275 to 2008/08/04.377."

2008 ON13	NEODyS	1541	2022-2086	23	1.13e-08	-4.78	-5.38	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/07/31.394 to 2008/08/04.104."

2008 OB9	JPL Sentry	1541	2019-2106	18	3.7e-07	-2.13	-2.45	0	JPL: "Analysis based on 20 observations spanning 5.8983 days (2008-Jul-29.34054 to 2008-Aug-04.23882)." Diameter approximately 1.108 km. from mean, weighted H=17.4.
2008 OB9	NEODyS	1541	2019-2088	13	3.05e-07	-2.20	-2.55	0	NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2008/07/29.341 to 2008/08/04.240."

2008 OO	JPL Sentry	1541	2092-2100	3	2.8e-07	-4.04	-4.14	0	JPL: "Analysis based on 80 observations spanning 9.1711 days (2008-Jul-26.09211 to 2008-Aug-04.26326)." Diameter approximately 0.378 km. from mean, weighted H=19.8.
2008 OO	NEODyS	1541	R E M O V E D						-

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 5 August '08

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

2207	Grabbed MPEC 2008-P30 - 2007 TU431, 2007 TV431 - see above
1541	Noted that JPL Sentry has updated its 2008 OB9 risk assessment - see above Noted that NEODyS has updated its 2008 OB9 risk assessment - see above Noted that NEODyS has posted 2008 ON13 as an impact risk - see above Noted that JPL Sentry has updated its 2008 OO risk assessment - see above Noted that NEODyS has removed 2008 OO as an impact risk - see above Noted that JPL Sentry has updated its 2008 PF1 risk assessment - see above Noted that NEODyS has posted 2008 PF1 as an impact risk - see above Noted that JPL Sentry has posted 2008 PH3 as an impact risk - see above Noted that JPL Sentry has posted 2008 PK3 as an impact risk - see above Grabbed MPEC 2008-P25 - Daily Orbit Update - see above Grabbed MPEC 2008-P26 - 2008 PH3 - see above Grabbed MPEC 2008-P27 - 2008 PJ3 - see above Grabbed MPEC 2008-P28 - 2008 PK3 - see above Grabbed MPEC 2008-P29 - 2008 PL3 - see above
0409	Grabbed MPEC 2008-P24 - 2008 PT1 - see above

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