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: Interstellar distance
    From: Paul Hirose
    Date: 2005 Sep 11, 10:32 -0700

    Mike Hannibal wrote:
    > I have looked through the archives but have been
    > unable to find the way to calculate predicted
    > inter-stellar, interplanetary,
    > stellar/planetary/lunar/solar etc distances.
    
    The IAU (International Astronomical Union) has an approved collection of
    positional astronomy algorithms online as the SOFA library. It is
    written in Fortran 77. On my system the full SOFA package compiled
    without a hitch using MinGW, a Windows port of the GNU multi-langauge
    compiler.
    
    http://www.iau-sofa.rl.ac.uk/
    
    I'm glad you asked the question. When I checked the SOFA page, I noticed
    that they posted a new package a few days ago. Among other things, it
    fixes a tiny bug in the separation angle routine. The former version
    returned an incorrect result if the two points were in exactly opposite
    directions.
    
    
    

       
    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