Welcome to the NavList Message Boards.


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

Compose Your Message

Add Images & Files
    Name or NavList Code:
    Re: 2016, June 14th Mars Lunars
    From: Frank Reed
    Date: 2016 Jun 15, 22:30 -0700


    You wrote:
    "The idea is that, at any given time, the actual slope of a body's changing alitude (or, in this case, apparent distance from the moon) can be calculated and compared with one's observations."
    And added:
    "Do you think I would get a more accurate fit if I somehow worked parallax back into the calculated distances"

    Aha. Yes, I wondered if that was what you were talking about. The geocentric, cleared distances change at a rate that is significantly different from the rate at which the observed distances change. Unlike celestial altitudes, lunar distances are affected by the corrections, primarily lunar parallax as you suspected, at a rate that is a substantial fraction of the base rate. Please tell me if that makes sense, as words, and then I would be happy to get into quantitative details (and you can, no doubt, do so yourself if we are on the same page as far as this verbal description goes).

    Frank Reed

    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    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 Settings

    NavList ID Code:

    Custom Index

    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