Thursday9 September 20047:43am MDT2004-09-09 UTC 1343

News briefs

Comet news:  Currently posted to the NEOCP is temporary designation ASAS1, a likely comet discovery by the All Sky Automated Survey at Las Campanas yesterday that had the Comets Mailing List abuzz. Hirohisa Sato provided a preliminary orbit calculation to the list yesterday with perihelion at q=0.29505 late on 12 October at i=57.9° and e=1.0.

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Risk monitoring Tuesday 9 Sept. tomorrow

JPL posted 2004 RJ9 yesterday, and NEODyS posted it today, both with three (different) low-rated impact solutions. It was discovered early Tuesday by LINEAR in New Mexico, linked with LINEAR observations a day before, and confirmed Tuesday night by KLENOT in the Czech Republic, Gnosca and Eschenberg observatories in Switzerland and Guidestar Observatory in Germany, and yesterday morning by Powell and Farpoint observatories in Kansas and Table Mountain Observatory in southern California. This object, which JPL estimates to have a diameter on the order of 416 meters/yards, is not reported in the Thursday Daily Orbit Update MPEC.

Stu Megan assisted with this report.

Summary Risk Table - sources checked at 1322 UTC, 9 Sep

Object

Assessment

Years

VI
PS
cum
PS
max
T
S
Arc 
days
 2004 RJ9 NEODyS 9/92038-20583-6.29-6.3602.109
JPL 9/82049-20943-6.01-6.2002.109
 2004 FU162JPL 8/242006-2104824-5.38-6.3700.031
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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