Wednesday28 July 20044:20pm MDT2004-07-28 UTC 2220 back top next  

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

Today's issue status: done

yesterdayJulytomorrowIndex
  • News briefs – occultation & binary news
  • Risk monitoring – JPL has posted 2004 OT11
    – 2004 NL8 has been pulled by JPL & reposted by NEODyS

Cover: Working this morning at around 0800 UTC, which was 10am his time and 2am at the telescope, Robert Hutsebaut in Belgium used a Rent-A-Scope telescope in New Mexico to help confirm yesterday's discovery of 2004 OT11. This is a composite of twelve 20-second exposures stacked on the object's motion of 1.21"/min. toward 353.7°. This kilometer-size object has now been posted with some highly preliminary impact solutions (see below).

News briefs – panel 1/1 Major News for 28 July 2004 back top next  
News briefs

Occultation & binary news:  Sky & Telescope tells today of doubts about a possible discovery of a satellite for Main Belt asteroid 302 Clarissa during a June 24th stellar occultation (see June 28th news), and reports that an ESO 8.2m VLT in Chile will be used to try to resolve the satellite directly. This article also mentions satellite discovery claims from occultation observations for 772 Tanete in April (see news) and 98 Ianthe in May.

It has been brought to A/CC's attention that Raoul Behrend told the Minor Planet Mailing List (MPML) earlier this month that Main Belt asteroid 854 Frostia has been found from photometry to be binary.

Risk monitoring - panel 1/1 Major News for 28 July 2004 back top next  
Risk monitoring 28 July

JPL has posted 2004 OT11 (see the CRT), which was announced today in MPEC 2004-O42 as discovered yesterday morning by LINEAR in New Mexico and confirmed this morning by Naef Observatory in Switzerland, Wildberg Observatory in Germany, Great Shefford Observatory in England, Powell Observatory in Kansas, Robert Hutsebaut in Belgium operating a telescope in New Mexico (see cover above), and Francisquito Observatory in southern California. JPL estimates this object's diameter at 1.22 km. (0.76 mile).

The Wednesday Daily Orbit Update MPEC has observation of 2004 NL8 from Eschenberg Observatory in Switzerland early yesterday. And today JPL removed its last impact solution for this object while NEODyS reposted it with one low-rated solution in 2069.

Summary Risk Table - sources checked at 2206 UTC, 28 Jul

Object
Assessment
Years
VI		PS
cum		 PS
max		T
S		Arc 
days
 2004 OT11JPL 7/282009-210280-3.13-4.1201.045
 2004 NL8JPL 7/28R E M O V E D
 NEODyS 7/282069-20691-3.95-3.95016.674
 2004 ME6JPL 6/282017-209943-5.64-6.3500.873
 NEODyS 6/272044-20637-7.29-7.7600.873
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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