Sunday21 March 200412:30pm MST2004-03-21 UTC 1930 back top next  

The Asteroid/Comet Connection's
daily news journal about
asteroids, comets, and meteors


Today's issue status: done
yesterdayMarchtomorrowIndex

Cover: This week began with news of 2003 VB12, possibly the largest Solar System object found since Pluto. Attention soon switched to little 2004 FH making the closest Earth flyby yet observed. But the smallest object discovery announced was 2004 EL20, seen at left from Peter Birtwhistle's confirmation work late Tuesday. JPL puts it at H=26.81, which converts to roughly 15 meters/yards wide.

Details: 2004 EL20 2004 Mar 16 2028-2044 UT. Mag +18.7. Stacked for motion of 40"/min in p.a. 257°. 46x6s exposure (4m 36s total). Field 10'x10', N up. 0.30m f/6.3 Schmidt-Cassegrain+CCD. P Birtwhistle (J95).
News briefs – panel 1/1 Major News for 21 March 2004 back top next  
News briefs

Planetary humor:  The St. Louis Post-Dispatch has a cute piece today by columnist, Betty Cuniberti, "Be afraid, be very afraid of Sedna."

Last week, scientists announced they found Sedna, a round, red, icy thing, a sort of orbiting strawberry margarita... At first I thought it must be something spelled backwards [Andes]... Now the question of whether Sedna is a planet, planetoid or health-insurance company [Aetna] resurrects this entirely unprovoked attack on Pluto. 

Risk monitoring - panel 1/1 Major News for 21 March 2004 back top next  
Risk monitoring 21 March

The Minor Planet Center Status Page notes that the Daily Orbit Update MPEC generation run failed overnight and "has been abandoned" for today.

Lance Benner told the Minor Planet Mailing list (MPML) today that a power outage prevented Arecibo from observing 2004 FH by radar.

Summary Risk Table - sources checked at 1901 UTC, 21 Mar

Object

Assessment

Years

VI
PS
cum
PS
max
T
S
Arc 
days
 2004 FZ1 NEODyS 3/202051-20562-4.73-4.7901.035
 2004 FHNEODyS 3/20R E M O V E D
JPL 3/202073-21024-6.38-6.7602.771
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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