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Re: Observe the Transit of Mercury
From: Brad Morris
Date: 2019 Nov 10, 16:19 -0500
From: Brad Morris
Date: 2019 Nov 10, 16:19 -0500
Hi David
You mentioned
I don't want to start looking through it however well filtered.
How in the world do you take a noon observation for latitude?
We look at the sun all the time though our sextants. Some sextants come with filters to reduce the intensity. There can be three places where those filters exist. Index path, horizon path and finally, after the telescope, at the exit aperture.
I intend to use the exit aperture filter, on one of the higher power scopes, taking a look from time to time, cloud cover permitting. Hopefully, I can see the dot. If not, I can take comfort in knowing I have already seen Mercury at maximum elongation.
Brad
On Sun, Nov 10, 2019, 1:33 PM David Pike <NoReply_DavidPike@fer3.com> wrote:
Brad you said:Why aren't you using a high magnification sextant telescope with suitable exit aperture filter?You don't get high with Hughes. It's 2X for a Mk2 periscopic or 2.5X for a Mate's 3 Circle. There is a 5x with the Mate's for horizontal work, but it's like a pea shooter. I don't think it would throw much of a projection, but I'll give it a try. I don't want to start looking through it however well filtered. In any case, the star gazers talk about using 60X. DaveP
