Risk monitoring  20 March 
Today NEODyS posted 2004 FZ1, which has observations reported in the Saturday Daily Orbit Update MPEC (DOU) from yesterday morning from LINEAR in New Mexico. This object was announced yesterday in MPEC 2004-F34 as discovered early Thursday by LINEAR, and confirmed Friday morning by Tenagra II, Powell, and Table Mountain observatories in Arizona, Kansas, and southern California. 2004 FZ1 has an eccentric (e=0.5588) and very inclined (i=52.4°) preliminary orbit calculation and, from its brightness, is estimated to be roughly 740 meters/yards wide.
The DOU has observation of 2004 FH from Thursday from Kuma Kogen Observatory in Japan, and today NEODyS removed its one impact solution for this little Earth-buzzer. (At 6pm on a Saturday evening in Pasadena, JPL hadn't yet updated its 2004 FH risk assessment with today's new data.)
The Arecibo schedule is currently showing there will be an attempt to observe 2004 FH by radar tomorrow.
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| Summary Risk Table - sources checked at 0203 UTC, 21 Mar |
Object |
Assessment |
Years |
VI | PS
cum |
PS
max | T
S | Arc
days |
|
| 2004 FZ1 | NEODyS 3/20 | 2051-2056 | 2 | -4.73 | -4.79 | 0 | 1.035 |
|
| 2004 FH | NEODyS 3/20 | R E M O V E D |
| JPL 3/20 | 2073-2102 | 4 | -6.38 | -6.76 | 0 | 2.771 |
VI = count of "virtual impactors" (impact solutions)
See A/CC's Consolidated Risk Tables for more and maybe
newer details, and check the monitors' links for latest info.
Note that only objects recently in view are shown here.
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