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
    Lunars - Nov. 11th, 2014
    From: Sean C
    Date: 2014 Nov 12, 23:05 -0800

    Shot a few more lunars the other day. This time using Jupiter. After working them out, I began to wonder about the effect of planetary motion on the accuracy of lunars. Specifically, I wondered if a lunar might be noticably more accurate if a planet in retrograde were used while the distance was decreasing. My reasoning was that the motion of the planet "toward" the Moon would add to the rate of decrease, allowing a finer interpolation of the time. After some investigating, I found that the maximum change in rate was only around 3 or 4 arc minutes per hour.

     

    Is that right, or did I miss something?

     

    -Sean C.



    File:

      

       
    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