lauren@UCLA-Security@sri-unix (05/28/82)
From: lauren at UCLA-Security (Lauren Weinstein)
Mail-from: koolish@BBN-UNIX; 14 May 1982 0820-EDT
Via: bbnp.ARPAnet; Fri May 14 05:54:15 1982
Date: 14 May 1982 8:20:32 EDT (Friday)
From: Dick Koolish <koolish at BBN-UNIX>
Subject: Lunar Eclipse
To: list/astro: at BBN-UNIX
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Date: 10 May 82 13:55:28-EDT (Mon)
From: Joyce Eikenberry (VLD/ATB) <joycee at BRL>
To: Arpanet-BBoards at MIT-ML
Subject: 1982 Lunar Eclipse schedule (60 lines)
Redistributed-by: David Mankins <dm at BBN-RSM>
Redistributed-to: koolish@BBN-RSM
Redistributed-date: 13 May 1982 16:51:53 EDT (Thursday)
According to an article in The Mother Earth News Magazine (and probably
other publications as well, but TMEN is the one I read) there will be
not one, but TWO total lunar eclipses during 1982. The first will occur
on July 6th, the second on December 30th; both will be visible through-
out most of the United States.
With volcanic dust from Mt. St. Helen's still in Earth's atmosphere, the
color displays across the face of the Moon should be spectacular. And,
if you miss both of these eclipses, you probably won't get another chance
to see one (unless you travel a lot, and unless your travel coincides
with an eclipse elsewhere in the world) until close to the end of this
decade.
So "...don't miss that rare and beautiful hour when the fair face of the
Moon is shadowed and rose-tinted...you'll be glad you gave up your warm
and comfortable bed for it."
Here's the timetable:
July 6
EASTERN DAYLIGHT TIME:
12:22a.m. moon enters penumbra
1:33a.m. moon enters umbra; partial phase begins
2:38a.m. moon completely in umbra; total eclipse begins
3:31a.m. mid-eclipse
4:24a.m. moon begins to leave umbra; total eclipse ends
5:29a.m. moon leaves umbra; partial phase ends
*5:35a.m. sunrise
*5:50a.m. moonset
6:40a.m. moon leaves penumbra
December 30
EASTERN STANDARD TIME:
3:52a.m. moon enters penumbra
4:50a.m. moon enters umbra; partial phase begins
5:58a.m. moon completely in umbra; total eclipse begins
6:29a.m. mid-eclipse
6:59a.m. moon begins to leave umbra; total eclipse ends
*7:20a.m. sunrise
*7:35a.m. moonset
8:07a.m. moon leaves umbra; partial phase ends
9:06a.m. moon leaves penumbra
*Approximate times for latitude 40 degrees north in
the middle of the eastern time zone. If you're
better at math than I am (and 'most anybody is) you
can figure exact times for "here".
Happy viewing!
joycee
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Mail-from: koolish@BBN-UNIX; 23 May 1982 1952-EDT
Via: bbnp.ARPAnet; Sun May 23 17:19:43 1982
Date: 23 May 1982 19:52:07 EDT (Sunday)
From: Dick Koolish <koolish at BBN-UNIX>
Subject: lunar eclipse
To: list/astro: at BBN-UNIX
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Date: 22 May 1982 22:57 EDT
From: Robert Elton Maas <REM at MIT-MC>
Subject: Lunar Eclipse
To: koolish at BBN-UNIX
Note that times for eclipse are absolute times, i.e. you have to add
or subtract according to what time zone you're in, but within a zone
the numbers are exactly correct no matter where you are. The times
for sunrise and moonset however are local time. If you live 2 hours 15
minutes of longitude west, the event happens 2 hours 15 minutes later
in realtime, so you have to add 2 hours 15 minutes then subtract how
many hours of time zone you are different. To a first approximation the
answer is zero (plus or minus about a half hour) because time zones
correspond to longitude (sort of). Of course latitude also affects
sunrise and moonset, but you need trigonomotry or an almanac to figure
out or look up that effect.
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--Lauren--