Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Parallax of the sun
    From: Fred Hebard
    Date: 2004 Sep 20, 20:07 -0400

    I use the parallax of the sun in clearing lunar distance observations,
    and haven't done any for a while, until this evening (about 1.5-2.5
    minutes out).  It's usually 0.1' of arc.  Is it tabulated or mentioned
    in the Nautical Almanac?  I couldn't find any mention of an actual
    value.
    
    Thanks,
    
    Fred Hebard
    
    P.S.  We're coming up on another equinox.  I, for one, wouldn't mind
    another discussion of how it's determined.  I know it's old hat to
    proficient astronomers such as Herbert Prinz, Geo Huxtable, Frank Reed,
    etc, but for the rest of us...!
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site