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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Star-to-star distance for sextant calibration?
    From: Lars Bergman
    Date: 2019 May 20, 13:41 -0700

    Tony, you wrote  "what should I do with those mystic columns - the (φ-D) and (φ+D)?"

    When the star is vertically aligned below Polaris, then the altitude is close to (φ-D); when vertically above Polaris (φ+D). So my guess is that those columns are the corrections to use in these special cases, then you don't need to interpolate the correction between the tabulated altitude values.

    Lars 59°N 18°E

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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