Friday3 September 200412:49pm MDT2004-09-03 UTC 1849

News briefs

Meteor news:  A Carnegie Institution news release posted yesterday at EurekAlert (also here) talks “about the origin of two presolar grains from the Tieschitz meteorite and the implications they have for resolving observational and theoretical challenges of dusty outflows surrounding asymptotic giant branch (AGB) stars — one of the last evolutionary stages of low-mass stars like the Sun [and] the most significant source of dust in the Milky Way galaxy” Space.com has a report from yesterday.

Nature has an item from yesterday telling of an experiment that indicates “Bugs inside lumps of rock can survive impacts at speeds of more than 11 kilometres per second,” especially into ice. This is important to the panspermia concept of planets exchanging life, and to the possibility that a planet can reseed its own life from space after a total extinction event.

The Planetary Society has a report from yesterday about the first discovery of a geologic debris layer from the Chesapeake Bay impact 35 million years ago.

According to an article in The Oregonian today, a “a group of West Linn residents” is raising money to “to build an interpretive center and full-size model of the Willamette Meteorite,” the largest found in the U.S. and now located in New York City.

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Today's issue status: done

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Bits & pieces:  A report from Clark Chapman posted by David Morrison August 31st tells of an August planetary emergencies meeting held by the World Federation of Scientists in Erice, Italy. He mentions that the cosmic objects panel proposed establishing an “NEO Center at Erice.” An issue of Morrison's NEO News E-mail newsletter, with an open letter from Rusty Schweickart of the B612 Foundation to the professional NEO community, was posted yesterday by SpaceRef.com, saying that this “International Center for Asteroid Impact Hazards [is] envisioned as a permanent entity largely dedicated to the development and implementation of international policies related to NEO issues.”

An article yesterday at the Flagstaff Arizona Daily Sun tells about a high school student who participated in a six-week Summer Science Program at New Mexico Tech where 36 students observed Main Belt asteroid 51 Nemausa and wrote a computer program to calculate its orbit.



Risk monitoring yesterday 3 Sept. Sunday

Today both NEODyS and JPL removed their remaining impact solutions for 2004 QB17. Observations of it were reported in the Friday DOU from Great Shefford Observatory in England early Wednesday and on both sides of midnight Wednesday night. It was caught last night by KLENOT in the Czech Republic and again on both sides of midnight by Great Shefford, and then, this morning, it was picked up by Jornada Observatory in New Mexico.

Stu Megan assisted with this report.

Summary Risk Table - sources checked at 1824 UTC, 3 Sep

Object

Assessment

Years

VI
PS
cum
PS
max
T
S
Arc 
days
 2004 QB17JPL 9/3R E M O V E D
NEODyS 9/3R E M O V E D
 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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