2008-07-18 Tracking News

Contents on 18 July '08

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
Observers -- six observing facilities
Impact Risk Monitoring -- one object
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.

Radar Astrometry on 18 July '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:

Data addition noted at 0521 UTC when the database was dated 17 July

90403 2003 YE45 from Arecibo (July 6.78 range) and Goldstone DSS-14 70m antenna (July 16.30 velocity) - see links

NEOCP Activity on 18 July '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on July 15th.

New MPECs on 18 July '08

Minor Planet Electronic Circulars

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

<< DOU on 18 July '08 >> MPEC 2008-O10 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08N03O 2008 NO3 (Q=5.036 AU, arc=3 days, H=18.5 ~676m) from the Siding Spring Survey (SSS) (July 17.37p2)
Observations of other objects
K08N01S 2008 NS1 (Q=4.327 AU, arc=12 days, H=17.3 ~1.17 km) from SSS (July 17.38p1 & 17.48p1)
K08N00U 2008 NU (Q=5.150 AU, arc=15 days, H=17.4 ~1.12 km) from Lumezzane Obs. (July 11.09-10p2)
K08M01H 2008 MH1 (Q=4.268 AU, arc=19 days, H=18.3 ~741m) from SSS (July 17.39p1)
K08M00Z 2008 MZ (Q=4.210 AU, arc=32 days, H=18.0 ~851m) from SSS (July 17.49-50p2)
K08K05Z 2008 KZ5 (arc=49 days, H=20.0 ~339m) from Astronomical Research Obs. (ARO) (July 17.19-21p3)
K08J35T 2008 JT35 (Q=4.081 AU, arc=73 days, H=21.3 ~186m) from ARO (July 17.28-29p4)
K08E69C 2008 EC69 (Q=4.458 AU, arc=2 opp, H=17.2 ~1.23 km) from SSS (July 16.82-83p4)
K08B18T 2008 BT18 (arc=4 opp, H=18.3 ~741m) from SSS (July 16.65p1)
K07Y56Q 2007 YQ56 (arc=2 opp, H=19.9 ~355m) from ARO (July 17.28-29p3)
K05V05T 2005 VT5 (arc=2 opp, H=19.3 ~467m) from ARO (July 17.20-21p3)
K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from ARO (July 17.18-19p3)
K04X14O 2004 XO14 (Q=4.154 AU, arc=4 opp, H=16.1 ~2.04 km, q=1.190 AU) from ARO (July 17.22-23p3)
K04T10G 2004 TG10 (q=0.316 AU, Q=4.169 AU, arc=2 opp, H=19.5 ~426m) from ARO (July 17.17-18p4)
K04L03V 2004 LV3 (arc=2 opp, H=18.7 ~616m) from ARO (July 17.17p4)
K04J20W 2004 JW20 (arc=5 opp, H=20.7 ~245m) from ARO (July 17.23-25p4)
K03O04B 2003 OB4 (Q=4.516 AU, arc=2 opp, H=19.2 ~490m) from ARO (July 17.18-19p3)
K03N00C 2003 NC (q=0.274 AU, arc=4 opp, H=19.3 ~467m) from ARO (July 17.24-25p3)
K01T45A 2001 TA45 (arc=4 opp, H=19.1 ~513m) from ARO (July 17.26-27p3)
K00R77L 2000 RL77 (arc=5 opp, H=16.8 ~1.48 km) from ARO (July 17.26-27p3)
I9058 189058 2000 UT16 from ARO (July 16.14-15p3)
I9040 189040 2000 MU1 from ARO (July 15.23-24p4 & 16.17-18p3)
54789 54789 2001 MZ7 from Lumezzane Obs. (July 10.99p4)
35107 35107 1991 VH from Stonegate Obs. (July 16.19-24p5)
00887 887 Alinda (1918 DB) from SSS (July 16.69-72p4)

Observers on 18 July '08

Six observing facilities appear in today's MPEC.

Code	Observer / observatory
`251`	Arecibo in Puerto Rico, 1 in radar -- 90403
`H55`	Astronomical Research Obs. (ARO) in Illinois, 15 in MPEC 2008-O10 -- 2008 KZ5, 2008 JT35, 2007 YQ56, 2005 VT5, 2005 NB7, 2004 XO14, 2004 TG10, 2004 LV3, 2004 JW20, 2003 OB4, 2003 NC, 2001 TA45, 2000 RL77, 189058, 189040
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 90403
`130`	Lumezzane Obs. in Italy, 2 in MPEC 2008-O10 -- 2008 NU, 54789
`E12`	Siding Spring Survey (SSS) in New South Wales, 7 in MPEC 2008-O10 -- 2008 NS1, 2008 NO3, 2008 MZ, 2008 MH1, 2008 EC69, 2008 BT18, 887
`H67`	Stonegate Obs. in Michigan, 1 in MPEC 2008-O10 -- 35107

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

Impact Risk Monitoring on 18 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 NO3	JPL Sentry	1427	2032-2099	25	3.1e-07	-3.22	-3.59	0	JPL: "Analysis based on 14 observations spanning 3.0087 days (2008-Jul-14.36382 to 2008-Jul-17.37255)." Diameter approximately 0.680 km. from mean, weighted H=18.5.
2008 NO3	NEODyS	1427	2032-2090	27	2.34e-07	-3.29	-3.65	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/07/14.365 to 2008/07/17.373."

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 18 July '08

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

1427	Noted that JPL Sentry has updated its 2008 NO3 risk assessment - see above Noted that NEODyS has updated its 2008 NO3 risk assessment - see above Grabbed MPEC 2008-O10 - Daily Orbit Update - see above
0521	Noted Radar Astrometry database addition - see above

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