home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!Germany.EU.net!news.Hamburg.Germany.EU.net!abbs.hanse.de!ch.steyaert
- From: ch.steyaert@abbs.hanse.de (Chris Steyaert)
- Newsgroups: sci.astro
- Subject: Killer Comet Threath Dismissed
- Reply-To: ch.steyaert@abbs.hanse.de
- Message-ID: <065529.20447@ABBS.zer.sub.org>
- Date: 15 Nov 92 20:50:00 MET
- Distribution: sci
- Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
- X-Version: ZerUU V6.45c
- Lines: 82
-
- Space News of November 9-15 contains some interesting news and interviews
- with personalities directly involved in the "Swift-Tuttle 2126" case.
-
- The headline reads:
-
- Funds To Track Comets Get Big Boost, but Killer Comet Threat Dismissed
-
- ...
-
- Scientists hope an expanded observation program will yield a more accurate
- accounting of the largest comets and asteroids with orbits that could
- intersect the Earth's. Astronomers see only five or six of an estimated
- 2,000 such objects each year, and there is no organized international
- effort to track them.
-
- ...
-
- NASA's expansion of the program - adding $500,000 to a program of less
- than $1 million - follows a January report to Congress that recommended
- an international effort to build six ground-based telescopes designed for
- comet detection. Morrison, who served as chairman of the Report of the NASA
- International Near-Object Detection Workshop, said such telescopes could be
- used to transform statistical estimates into hard facts.
-
- Most scientists agree that NASA's modest funding increase, earmarked for
- upgrading telescopes and expanding their use, is proportionate to the need
- to improve international detection and tracking of comets, both to improve
- scientific knowledge and to keep an eye on any threatening objects.
-
- ...
-
- Astronomers expect Swift-Tuttle to return to its closest point to the sun
- on July 11, 2126. However, if the prediction is off by 15 days, the comet
- would hit the Earth on August 14, 2126, according to astronomer Brian
- Marsden.
-
- ...
-
- The problem with Swift-Tuttle is that the comet seems to be throwing off
- an unusually high amount of vapor and dust, producing a trusting action
- that could distort its orbit.
-
- "The comet has shifted in a way we don't quite understand," Marsden told
- Space News November 3. "It's very unusual".
-
- ...
-
- Other scientists however, are more confident in their prediction that
- Swift-Tuttle will not hit the Earth.
-
- Donald Yeomans, research astronomer at NASA's Jet Propulsion Laboratory in
- Pasadena, Calif., said the computational method he used accounted perfectly
- for the 1737, 1862, and 1992 sightings. He predicts a 2126 return to its
- closest point to the sun with a margin of error of just one day, eliminating
- any possibility of an Earth collision.
-
- Yeomans contends the comet's thrusting has no noticeable impact on its orbit.
-
- "The orbit is so large that it probably doesn't matter," he said in a
- November 3 interview. "You can't push around a tank by a little tiny tail".
-
- ....
-
- "The surveillance may dispose of the whole problem," Marsden said. "Maybe
- there is nothing to worry about next time, but we just have to watch out."
-
-
- --
- Chris Steyaert
- Dr. Van de Perrestr. 83
- B 2440 Geel
- Belgium
- fax (32)14 22 13 73
-
- --
- ------------------------------------------------------------------------------
- ABBS AstroMail, the first and most popular German astronomical bulletin board
- ------------------------- for amateur astronomers ----------------------------
- + 49 5851 7896 / V.21, V.22, V.22bis, V.32, V.42, V.42bis and MNP5
- ------------------------------------------------------------------
-
-
-