Friday16 January 20044:14pm MST2004-01-16 UTC 2314 back top next  

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


Today's issue status: done
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Roach Dry Lake 031
Photo by finder Robert Verish

Today's cover shows a meteorite where Robert Verish found and photographed it on 6 May 2002, used with permission from his Nevada Meteorite Picture site. A coin, 6" scale, and GPS device document the size and location of the object, classified as an H6 chondrite and provisionally named Roach Dry Lake 031 (see 726Kb JPEG of a cross-section).

News briefs – part 1/1 Major News for 16 Jan. 2004 back top next  
News briefs

Comet news:  The Central Bureau for Astronomical Telegrams is showing that the very unusual object 2003 WT42 has been caught exhibiting cometary activity, and has now been named and redesignated as C/2003 WT42 (LINEAR). A/CC's previous reports about this object and its orbit are now all out of date. See MPEC 2004-B02 for info current as of late on the 16th UT.

Spanish fireball by Marco Langbroek

On the Spanish SPMN Web site, the first trajectory results are now presented. They also provide some very interesting speculation about the possibility that this fireball might have moved in an orbit similar to that of the 3 January 1970 Lost City meteorite, an H5 chondrite. The still very preliminary results on the radiant position of the Spanish fireball appear to be somewhat similar to that of Lost City to some extent.

This report continue's A/CC's long news thread about the January 4th bolide.

More meteor news:  The Cleveland, Ohio Plain Dealer has an article today [link expired], "Cleveland geologist's cool job: finding bits of Mars on Earth," about Ralph Harvey of Case Western Reserve University, leader of ANSMET meteorite expeditions.

This year's Antarctic search [combing] the LaPaz ice field 217 miles northwest of the South Pole Station [has yielded] 655 meteorite samples as of last Saturday. One of the best finds was a 50-pound basketball-sized specimen whose interior was flecked with chondrules — distinctive round deposits that are some of the first solids to appear as dust coalesced into our solar system. 

A New Indian Express article, "Why NASA scientists visited Nagpur before Mars mission," tells about the visit of Horton Newsom of the University of New Mexico to study "one of only two impact craters created by a meteor strike on basaltic land, which is located at Lonar in Maharashtra," thus one of the closest analogs to craters on Mars. It also tells about the need to protect this "50,000-year old, 1.8-km diameter crater" by declaring it a World Heritage site.

See the Lonar Crater Web site for more info.

Risk monitoring - part 1/1 Major News for 16 Jan. 2004 back top next  
Risk monitoring 16 Jan.

The Friday Daily Orbit Update MPEC carries observations of 2003 YG118 from last night from Sormano Observatory in Italy and Eschenberg Observatory in Switzerland. Today JPL slightly lowered its risk assessment for this object estimated at roughly 1.37 km. (0.85 mile) wide.

Summary Risk Table - sources checked at 2232 UTC, 16 Jan

Object

Assessment

Years

VI
PS
cum
PS
max
T
S
Arc 
days
 2003 YG118JPL 1/162087-20871-3.30-3.30029.620
NEODyS 12/31R E M O V E D
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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