Mars, Something that might be neat.


matsnellings <newfie122@cox.net>
 

Hi all
I was playing around with Starry Night checking out Mars. On the 19th
of June around 3am in the SE, it looks like Mars will be just above
the Moon and should make a really nice view. Using the 8x20
Binoculars field of view guide over haft of the Moon and all of Mars
will fit nicely in it. As I am new and don't have my scope yet I
am not sure if this will be a good photo op or not, because I don't
know the comparisons yet between binoculars field of view and a 8"
scope. But weather permitting I will be watching.

Mat


Kent Blackwell
 

Mat,

The lowest power you can effectively use with an 8" scope is 28x. That
magnification would yield a 7.1mm exit pupil. Any lower power would be empty
magnification, since the exit pupil diameter in the eyepiece exceeds the
size of the pupil in the human eye, 7.1mm. If you're not 18 years of age or
younger your eye is more than likely considerable smaller. But let's assume
you can effectively use 28x. If the eyepiece you use at that power has a
55-degree apparent field of view (the largest apparent field possible with
1-1/4" eyepiece at that power), the actual field would be
2-degrees. That's a whoppingly large field for a telescope, but miniscule
for binoculars. I think the moon and Mars will be more in the order of
2.25-degrees, conformably in the range of any descent binoculars or small
telescope. You might have to s-t-r-e-t-c-h the field to capture them both in
your 8". Thanks for telling us about June 19th. I'll put it on my calendar.
Of course we all know it'll be cloudy that night.

Kent Blackwell

----- Original Message -----
From: <newfie122@cox.net>
To: <backbayastro@yahoogroups.com>
Sent: Thursday, February 20, 2003 1:18 AM
Subject: [backbayastro] Mars, Something that might be neat.


Hi all
I was playing around with Starry Night checking out Mars. On the 19th
of June around 3am in the SE, it looks like Mars will be just above
the Moon and should make a really nice view. Using the 8x20
Binoculars field of view guide over haft of the Moon and all of Mars
will fit nicely in it. As I am new and don't have my scope yet I
am not sure if this will be a good photo op or not, because I don't
know the comparisons yet between binoculars field of view and a 8"
scope. But weather permitting I will be watching.

Mat



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twforte@...
 

Hey Mat,

Mars is going to present a spectacular target all summer. It will certainly be a "pretty sight" in binoculars but will require a telescope to see any detail. If you haven't yet, check out the Mars article on our website http://groups.hamptonroads.com/bbaa and from there you can go to the site of the Association of Lunar and Planetary Observers (A.L.P.O.) and get detailed advice on photographing and observing Mars during this close approach. This is not just a "once in a lifetime event" this is a "once in a civilization" event. Mars will be closer than at any time in the past 59,000 years! Through much of the summer Mars will be at an apparent angular diameter larger than we have seen in the past 15 years. And before its done, it will get twice as bright as Sirius!

Ted

In a message dated 2/20/2003 1:18:29 AM Eastern Standard Time, "matsnellings <newfie122@cox.net>" <newfie122@cox.net> writes:

Hi all
I was playing around with Starry Night checking out Mars. On the 19th
of June around 3am in the SE, it looks like Mars will be just above
the Moon and should make a really nice view. Using the 8x20
Binoculars field of view guide over haft of the Moon and all of Mars
will fit nicely in it. As I am new and don't have my scope yet I
am not sure if this will be a good photo op or not, because I don't
know the comparisons yet between binoculars field of view and a 8"
scope. But weather permitting I will be watching.

Mat



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backbayastro-unsubscribe@yahoogroups.com



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