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Re: Mars sight reduction
From: Stan K
Date: 2014 Nov 19, 16:00 -0500

Samuel,

I should have mentioned this:

When using the Sight Reduction & Fix Tool of Celestial Tools, when set for "Show Ho corrections as SR Form", the Main and Additional Corrections are rounded to the nearest 0.1', but when set for "Show Ho corrections as Parameters", refraction, parallax, and semi-diameter are shown rounded to 0.001', so the effects of very small changes in time can be seen.

Stan

-----Original Message-----
From: Samuel L <NoReply_SamuelL@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Wed, Nov 19, 2014 2:32 pm
Subject: [NavList] Re: Mars sight reduction

Does the parallax value for Mars change from year to year?

The copy of the Altitude Correction Tables I have are dated 2003 and list the App. Alt. correction for Mars (on this general date) to be +0.2min for an Ha of less than 40d. So do I assume correctly that they are different each year?

Sam

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