[net.space] the occultation of Mars

KING@KESTREL (11/16/82)

From: Richard M. King <KING at KESTREL>
	Does anyone know whether and when it will be visible from the San
Francisco area?

						Dick
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REM@MIT-MC@sri-unix (11/18/82)

From: Robert Elton Maas <REM at MIT-MC>
Sky&Telescope has tables in the November issue. Places from
Boston/Chicago/Denver North get a near-miss instead of an occultation,
while Halifax NS gets an almost grazing occultation (22:28-22:37 UT =
9 minutes) and Norfolk VA gets a moderately short occultation
(22:04-22:34 UT = 30 minutes).  San Juan PR gets an almost central
occultation (lasting from 22:01 to 23:32 UT = 1 hr 31 min).  Places in
the West get the incident in broad daylight (Los Angeles gets it
19:52-20:40 UT which is about noon local time; whereas Norfolk VA gets
it 22:04-22:34 UT which is just after sundown local time).  The only
places listed which get an after-sundown occultation are Halifax NS,
Norfolk VA, and San Juan PR.  Columbia SC and Miami are borderline,
with the sun setting partway thru the occultation.  Therefore, if
you're East of the Columbia/Miami line and simultaneously South of the
Boston/Denver line, you'll get an occultation in dark. West of there
but still South of the Boston/Denver line you need binoculers or
telescope to see a daylight occultation, North/East you get a pretty
non-occultation, and North/West you lose completely with a daylight
miss.