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
    Re: Parallax in azimuth
    From: David Pike
    Date: 2020 May 24, 13:30 -0700

    DaveW you wrote:  Consider the moon on 23 May 2020 at 1330 UTC from 39N 77W.  What is the parallax in azimuth of the center?

    Dave
    Have you got that 2" theodolite out again?  P in Az is way above my head, but did you spot this http://www.titulosnauticos.net/astro/Chapter9.pdf . It seems very readable, and there are two formulae towards the end.  I'm not sure what the units are, but it looks like it depends upon which units you input, i.e. degrees in degrees out. DaveP

       
    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