2008-07-31 Tracking News

Contents on 31 July '08

IAU Minor Planet Center
- NEOCP Activity -- four listings: 4 updated
- New MPECs -- fifteen MPECs
Observers -- seventeen observing facilities
Impact Risk Monitoring -- seven 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 31 July '08

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of 20 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 31 July '08

Minor Planet Electronic Circulars

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

MPEC 2008-O53 time-stamped "00:39 UT" - 2006 AR2 - see below
MPEC 2008-O54 time-stamped "01:19 UT" - 2007 TE66 - see below
MPEC 2008-O55 time-stamped "01:25 UT" - 2008 OS7 - see below
MPEC 2008-O56 time-stamped "01:35 UT" - 2008 OT7 - see below
MPEC 2008-O57 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-O58 time-stamped "11:47 UT" - 2008 OM8 - see below
MPEC 2008-O59 time-stamped "11:49 UT" - 2008 ON8 - see below
MPEC 2008-O60 time-stamped "11:52 UT" - 2008 OO8 - see below
MPEC 2008-O61 time-stamped "11:55 UT" - 2008 OP8 - see below
MPEC 2008-O62 time-stamped "12:00 UT" - 2008 OQ8 - see below
MPEC 2008-O63 time-stamped "15:11 UT" - 2008 OX8 - see below
MPEC 2008-O64 time-stamped "16:41 UT" - 2008 OB9 - see below
MPEC 2008-O65 time-stamped "17:24 UT" - 2008 OC9 - see below
MPEC 2008-O66 time-stamped "20:14 UT" - 2008 OS9 - see below
MPEC 2008-O67 time-stamped "21:50 UT" - Comet C/2008 O1 (SOHO)

MPEC 2008-O67 - "21:50 UT" - Comet C/2008 O1 (SOHO)

CK08O010 C/2008 O1 (SOHO) (i=144.1°, q=0.005 AU, TP=2008 Aug. 1.67 TT) from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (July 31.60-78p18 & 31.82-85p4)

MPEC 2008-O66 - "20:14 UT" - 2008 OS9

K08O09S 2008 OS9 (H=18.8 ~589m) was discovered at 2320 UT on 29 July by Baldone Obs., which observed it at July 29.97-00p2 and 30.92-99p6. The discovery was confirmed by the Catalina Sky Survey (CSS) (July 25.37-38p3) and Moriyama Obs. (July 31.66-67p2).

MPEC 2008-O65 - "17:24 UT" - 2008 OC9

K08O09C 2008 OC9 (small asteroid, H=23.1 ~81m) was discovered at 1724 UT on 30 July by the Siding Spring Survey (SSS), which observed it at July 30.73-78p8 and 31.56-58p5.

MPEC 2008-O64 - "16:41 UT" - 2008 OB9

K08O09B 2008 OB9 (risk-listed, Q=6.262 AU, Earth MOID=5.3 LD, H=17.2 ~1.23 km) was discovered at 0810 UT on 29 July by the Mt. Lemmon Survey (MLS), which observed it at July 29.34-35p4, 30.24-26p4, and 31.24-25p4.

MPEC 2008-O63 - "15:11 UT" - 2008 OX8

K08O08X 2008 OX8 (H=21.5 ~170m) was discovered at 1349 UT on 30 July by SSS, which observed it at July 30.58-60p4, 30.68-74p7, and 31.45-48p3.

MPEC 2008-O62 - "12:00 UT" - 2008 OQ8

K08O08Q 2008 OQ8 (H=20.9 ~224m) was discovered at 0942 UT on 30 July by MLS, which observed it at July 30.40-48p8 and 31.38-39p4.

MPEC 2008-O61 - "11:55 UT" - 2008 OP8

K08O08P 2008 OP8 (risk-listed, H=19.7 ~389m) was discovered at 0939 UT on 30 July by CSS, which observed it at July 30.40-47p7 and 31.37p4. The discovery was confirmed by Great Shefford Obs. (July 31.01p2) and MLS (July 31.36-37p8).

MPEC 2008-O60 - "11:52 UT" - 2008 OO8

K08O08O 2008 OO8 (risk-listed, Earth MOID=2.3 LD, H=25.2 ~31m) was discovered at 0904 UT on 30 July by MLS, which observed it at July 30.38-45p7 and 31.29-30p8. This object was within ten lunar distances (LD) of Earth, reaching 2.4 LD on 23 July.

MPEC 2008-O59 - "11:49 UT" - 2008 ON8

K08O08N 2008 ON8 (small asteroid, H=25.2 ~31m) was discovered at 0805 UT on 30 July by MLS, which observed it at July 30.34-35p4, 30.40-42p4, and 31.39-40p4.

MPEC 2008-O58 - "11:47 UT" - 2008 OM8

K08O08M 2008 OM8 (borderline-small, H=21.8 ~148m) was discovered at 0735 UT on 30 July by MLS, which observed it at July 30.32-33p3 and 30.37-42p7. The discovery was confirmed by Remanzacco Obs. (July 30.91p1) and Great Shefford Obs. (July 30.98-99p3).

<< DOU on 31 July '08 >> MPEC 2008-O57 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08O00O 2008 OO (arc=3 days, H=19.7 ~389m) from Astronomical Research Obs. (ARO) (July 29.21-22p3)
Observations of recently (no longer) risk-listed objects
K08N03Q 2008 NQ3 (arc=16 days, H=20.3 ~295m) from SSS (July 30.80-81p5)
Observations of small asteroids (H>22.0)
K08O06A 2008 OA6 (arc=1 day, H=22.8 ~93m) from Great Shefford Obs. (July 29.97-98p2)
K08O00M 2008 OM (arc=5 days, H=22.4 ~112m) from ARO (July 29.20-21p3) and the Spacewatch 0.9m telescope (July 30.23-26p3)
Observations of other objects
K08O01X 2008 OX1 (arc=5 days, H=21.5 ~170m) from Moriyama Obs. (July 30.61-62p4) and Petit Jean Mtn. South Obs. (PJMSO) (July 31.15-17p8)
K08M01U 2008 MU1 (i=40.8°, arc=30 days, H=19.7 ~389m) from ARO (July 28.10-11p3) and PJMSO (July 31.13-14p8)
K08M01H 2008 MH1 (Q=4.265 AU, arc=32 days, H=18.3 ~741m) from SSS (July 30.40p5)
K08K28V 2008 KV28 (arc=59 days, H=20.3 ~295m) from ARO (July 29.13-15p3)
K08H03O 2008 HO3 (Q=4.799 AU, arc=91 days, H=18.0 ~851m) from ARO (July 29.09-11p3)
K06A02R 2006 AR2 (arc=2 opp, H=19.8 ~371m) from ARO (July 27.30-33p2 at V=22.0-22.2)
K06A00Q 2006 AQ (arc=4 opp, H=18.0 ~851m) from ARO (July 29.23-24p3)
K05Q30E 2005 QE30 (arc=4 opp, H=17.2 ~1.23 km) from ARO (July 29.31-33p3)
K05B00C 2005 BC (arc=2 opp, H=18.2 ~776m) from Hibiscus Obs. (July 30.24-27p2)
K04N08L 2004 NL8 (Q=4.419 AU, arc=3 opp, H=17.2 ~1.23 km) from MLS (July 30.26-27p4)
H3689 173689 2001 PK9 from Ametlla del Valles Obs. (July 30.04-06p4) and PJMSO (July 31.18-19p5)
A6589 106589 2000 WN107 from Spacewatch 0.9m (July 30.28-31p3)
A2873 102873 1999 WK11 from SSS (July 30.50-52p4)
21088 21088 1992 BL2 from SSS (July 30.37-39p4)
08567 8567 1996 HW1 from Ametlla del Valles Obs. (July 30.06-08p5)
07358 7358 Oze (1995 YA3) from CSS (July 30.44-45p4)
05653 5653 Camarillo (1992 WD5) from SSS (July 30.55-57p4)
04257 4257 Ubasti (1987 QA) from Crni Vrh Obs. (July 29.92-95p4) and Ametlla del Valles Obs. (July 30.08-10p6)
04179 4179 Toutatis (1989 AC) from CSS (July 30.28-30p8), MLS (July 30.30-31p4), and Begues Obs. (July 30.94p3)
02201 2201 Oljato (1947 XC) from MLS (July 30.46-48p4)

MPEC 2008-O56 - "01:35 UT" - 2008 OT7

K08O07T 2008 OT7 (risk-listed, Earth MOID=0.4 LD, H=27.2 ~12m) was discovered at 1452 UT on 30 July by SSS, which observed it at July 30.62-74p17. The discovery was confirmed by Grove Creek Obs. (July 30.76-77p2). This object is now within ten lunar distances (LD) of Earth, reaching 0.5 LD on 29 July (INTRUDER).

MPEC 2008-O55 - "01:25 UT" - 2008 OS7

K08O07S 2008 OS7 (risk-listed, Earth MOID=4.8 LD, H=20.3 ~295m) was discovered at 0552 UT on 30 July by CSS, which observed it at July 30.25-26p4 and 30.31-39p8. The discovery was confirmed by Cristovao Jacques via RAS Obs. Mayhill (July 30.43p3), Grove Creek Obs. (July 30.50-54p4 & 30.68-69p2), Moriyama Obs. (July 30.59-60p2), and Great Shefford Obs. (July 30.96p3).

MPEC 2008-O54 - "01:19 UT" - 2007 TE66

K07T66E 2007 TE66 (H=21.4 ~178m) from ARO (July 26.34-36p2 at V=21.9-22.0, 27.32-35p2 at V=22.1, 29.32-34p2 at V=21.8-22.1 & 29.38p1 at V=22.0)

MPEC 2008-O53 - "00:39 UT" - 2006 AR2

K06A02R 2006 AR2 (H=19.8 ~371m) from ARO (July 24.27-32p3 at V=22.7-9, 29.26p1 at V=22.8 & 29.30p1 at V=22.9)

Observers on 31 July '08

Seventeen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 3 in MPEC 2008-O57 -- 173689, 8567, 4257
`H55`	Astronomical Research Obs. (ARO) in Illinois, 9 in MPECs 2008-O53, 2008-O54 & 2008-O57 -- 2008 OO, 2008 OM, 2008 MU1, 2008 KV28, 2008 HO3, 2007 TE66, 2006 AR2, 2006 AQ, 2005 QE30
`069`	Baldone Obs. in Latvia, 1 in MPEC 2008-O66 -- 2008 OS9
`170`	Begues Obs. in Spain, 1 in MPEC 2008-O57 -- 4179
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2008-O55, 2008-O57, 2008-O61 & 2008-O66 -- 2008 OS9, 2008 OS7, 2008 OP8, 7358, 4179
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-O57 -- 4257
`J95`	Great Shefford Obs. in England, 4 in MPECs 2008-O55, 2008-O57, 2008-O58 & 2008-O61 -- 2008 OS7, 2008 OP8, 2008 OM8, 2008 OA6
`E16`	Grove Creek Obs. in New South Wales, 2 in MPECs 2008-O55 & 2008-O56 -- 2008 OT7, 2008 OS7
`F84`	Hibiscus Obs. in Tahiti, 1 in MPEC 2008-O57 -- 2005 BC
`900`	Moriyama Obs. in Japan, 3 in MPECs 2008-O55, 2008-O57 & 2008-O66 -- 2008 OX1, 2008 OS9, 2008 OS7
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2008-O57, 2008-O58, 2008-O59, 2008-O60, 2008-O61, 2008-O62 & 2008-O64 -- 2008 OQ8, 2008 OP8, 2008 OO8, 2008 ON8, 2008 OM8, 2008 OB9, 2004 NL8, 4179, 2201
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-O57 -- 2008 OX1, 2008 MU1, 173689
`H06.`	Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-O55 -- 2008 OS7
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-O58 -- 2008 OM8
`E12`	Siding Spring Survey (SSS) in New South Wales, 8 in MPECs 2008-O56, 2008-O57, 2008-O63 & 2008-O65 -- 2008 OX8, 2008 OT7, 2008 OC9, 2008 NQ3, 2008 MH1, 21088, 102873, 5653
`2493`	LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2008-O67 -- C/2008 O1
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-O57 -- 2008 OM, 106589

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

Impact Risk Monitoring on 31 July '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 OB9	JPL Sentry	1922	2014-2106	48	6.2e-08	-3.03	-3.62	0	JPL: "Analysis based on 12 observations spanning 1.9078 days (2008-Jul-29.34054 to 2008-Jul-31.2483)." Diameter approximately 1.241 km. from mean, weighted H=17.2.

2008 OP8	JPL Sentry	1525	2035-2092	3	3.3e-10	-6.24	-6.61	0	JPL: "Analysis based on 20 observations spanning .95670 days (2008-Jul-30.41557 to 2008-Jul-31.37227)." Diameter approximately 0.521 km. from mean, weighted H=19.1.

2008 OO8	JPL Sentry	1525	2021-2096	17	2.4e-06	-5.77	-6.33	0	JPL: "Analysis based on 15 observations spanning .91946 days (2008-Jul-30.37816 to 2008-Jul-31.29762)." Diameter approximately 0.030 km. from mean, weighted H=25.2.

2008 OT7	JPL Sentry	0433	2085-2098	3	2.0e-08	-9.01	-9.03	0	JPL: "Analysis based on 19 observations spanning .14927 days (2008-Jul-30.62013 to 2008-Jul-30.7694)." Diameter approximately 0.012 km. from mean, weighted H=27.2.

2008 OS7	NEODyS	1352	2087	1	9.36e-10	-6.81	-6.81	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/07/30.246 to 2008/07/30.964."
2008 OS7	JPL Sentry	0329	2069-2108	10	6.8e-09	-5.93	-6.47	0	JPL: "Analysis based on 26 observations spanning .71807 days (2008-Jul-30.245 to 2008-Jul-30.96307)." Diameter approximately 0.290 km. from mean, weighted H=20.3.

2008 OC6	NEODyS	2002	2011-2048	15	9.99e-10	-4.74	-5.31	0	NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/07/29.462 to 2008/07/30.484."

2008 OO	NEODyS	1352	2075-2081	5	1.99e-07	-4.08	-4.43	0	NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2008/07/26.093 to 2008/07/29.313."
2008 OO	JPL Sentry	1351	2075-2108	19	4.6e-07	-3.76	-4.36	0	JPL: "Analysis based on 61 observations spanning 3.2197 days (2008-Jul-26.09211 to 2008-Jul-29.31183)." Diameter approximately 0.390 km. from mean, weighted H=19.7.

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 31 July '08

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

2209	Grabbed MPEC 2008-O67 - Comet C/2008 O1 (SOHO) - see above
2022	Grabbed MPEC 2008-O66 - 2008 OS9 - see above
2002	Noted that NEODyS has posted 2008 OC6 as an impact risk - see above
1921	Noted that JPL Sentry has posted 2008 OB9 as an impact risk - see above
1802	Grabbed MPEC 2008-O65 - 2008 OC9 - see above
1706	Grabbed MPEC 2008-O64 - 2008 OB9 - see above
1525	Noted that JPL Sentry has posted 2008 OO8 as an impact risk - see above Noted that JPL Sentry has posted 2008 OP8 as an impact risk - see above Grabbed MPEC 2008-O63 - 2008 OX8 - see above
1352	Noted that NEODyS has updated its 2008 OO risk assessment - see above Grabbed MPEC 2008-O57 - Daily Orbit Update - see above Grabbed MPEC 2008-O58 - 2008 OM8 - see above Grabbed MPEC 2008-O59 - 2008 ON8 - see above Grabbed MPEC 2008-O60 - 2008 OO8 - see above Grabbed MPEC 2008-O61 - 2008 OP8 - see above Grabbed MPEC 2008-O62 - 2008 OQ8 - see above
1351	Noted that JPL Sentry has updated its 2008 OO risk assessment - see above Noted that NEODyS has posted 2008 OS7 as an impact risk - see above
0433	Noted that JPL Sentry has posted 2008 OT7 as an impact risk - see above
0329	Noted that JPL Sentry has posted 2008 OS7 as an impact risk - see above
0159	Grabbed MPEC 2008-O54 - 2007 TE66 - see above Grabbed MPEC 2008-O55 - 2008 OS7 - see above Grabbed MPEC 2008-O56 - 2008 OT7 - see above
0102	Grabbed MPEC 2008-O53 - 2006 AR2 - see above

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