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- Newsgroups: sci.astro
- Path: sparky!uunet!gumby!destroyer!cs.ubc.ca!newsserver.sfu.ca!news
- From: palmer@sfu.ca (Leigh Palmer)
- Subject: P/Swift-Tuttle at last!
- Message-ID: <1992Nov10.180131.9356@sfu.ca>
- Sender: news@sfu.ca
- Organization: Simon Fraser University
- Date: Tue, 10 Nov 1992 18:01:31 GMT
- Lines: 93
-
- British Columbia is not the best place to live if you like to look at the night
- sky regularly. Last night I finally saw the comet, and I wrote the following to
- my introductory astronomy students. The idea is to use some of the terminology
- I have been teaching them in ordinary communication. While the event was still
- truly exciting for me (though probably not so for those used to the luxury of a
- reliable sky) I wrote it down:
-
- Monday evening at 1720 I emerged from a two-hour committee committee meeting
- here at the university on a hilltop to be greeted by what has been an unusual
- sight for more than a month now. The sky was clear, and I saw Venus in the
- evening for my first time this year, boring a hole in the sky low in the
- southwest at magnitude -4 or so. Since I hadn't seen the sky in so long I had
- to dismiss the standard checkoff questions:
-
- "Landing lights?
- No; it's not moving.
- Supernova?
- Too bad.
- Venus!"
-
- I was even foolish enough to look hard for Mercury. That's how nice the sky
- looked, all the way down to Vancouver Island on the horizon. Silly me! The sky
- was still fairly bright, and I knew it was not yet time to look for P/Kegler-
- Swift-Tuttle-Kiuchi, which some are now calling "Marsden's Comet", the famous,
- threatening cosmic iceberg which I had not seen, even though it had been around
- since September.
-
- I had missed it on Monday of the previous week because I had had to attend an
- evening meeting on the first clear night in a month, and I had no visual aid
- with me, not even binoculars. This time, however, I was prepared. My Russian
- 20x60s were in the car, already mounted on their tripod. Two of my students had
- already been to my office, expecting that I would be going out to look. They
- had left twenty minutes before I got there, leaving me an e-mail note. I
- quickly alerted my students via a unix maillist I had set up for that purpose
- that I would be observing from the university. The system had worked well two
- weeks previously when a brief opening in the sky had given us a view of some
- nice sunspots during the day. Several students had showed up for that event, so
- I expected I might succeed again.
-
- I made a crude finder chart for the comet which, at that moment, was at an
- altitude above 45 degrees, and 15 degrees below Vega. (Any amateur astronomer
- who has not yet treated himself to a microcomputer is technologically deprived.
- British Columbia amateur astronomers may see the sky only on a cathode ray tube
- for weeks at a time!) I rushed to set up the binoculars in the quadrangle and
- found, disappointingly, that while I could easily see brighter objects, I
- couldn't even see Hercules with my unaided eye. Haze, the nearly full moon, and
- city lights were conspiring to defeat me once again. With a sinking heart I
- extended the tripod legs, removed the lenscaps, and pointed the binoculars at a
- point I reckoned to be about 15 degrees below Vega. Putting my eyes to the
- instrument I was thrilled. There was a fuzzy patch, smack in the middle of my
- tunnel-like two degree field of view!
-
-
- * #6591
-
- * #6584
-
-
-
-
-
- ...
- ::::: Yes!
- :::
- * #6570
-
-
-
-
-
- * #6528
-
-
- Murphy was obviously either asleep or he had pointed me at M13. I was fully
- aware of the latter possibility. The stars shown (their Yale Bright Star
- Catalog numbers added later) are all about sixth magnitude, as is the comet
- itself - and as is M13!) I watched the comet for a half hour. Murphy had
- another trick or two up his sleeve, of course. The comet faded from view, and I
- was convinced I had breathed on the eyepieces, something I try to remember not
- to do. It was, of course, the haze, and it came and went several times while I
- observed. I drew the field, convinced myself the thing had moved, and went home
- happy. The only disappointments were that only my wife had joined me in seeing
- it, and I could not see any trace of the tail described by others. Now that I
- really believe it is there I'll get the telescope out next time.
-
- On arriving home I fired up my Macintosh and produced a two degree high chart
- of the comet's position. My drawing showed that the comet, about ten arcminutes
- in diameter, was within five arcminutes of its predicted position relative to
- the sixth magnitude stars shown in the diagram above. There is something very
- satisfying about finishing an evening off in that way. I recommend it.
-
- Leigh
-
-