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
    What is the Longest Lunar Possible?
    From: Brad Morris
    Date: 2013 Jan 21, 02:00 -0500

    Lunarians:

    All this chatter about super short lunars got me thinking in the other direction.

    Is there a place on earth where we could observe a lunar distance of ~180 degrees?  Perhaps in the polar regions, where the sun never sets but skims the horizon and the full moon simultaneously visible to the observer? 

    Would the standard clearing methods work for this lunar?  Frank, you warn of errors when the distance is short, but how about when very long?  Would your calculator work? If there is an error in clearing long distances, at what angle do we need concern ourselves? 

    Lunarians may be familiar with Cook's lunar to 155 degrees.  I still don't understand how he measured this, given his equipment.  He didn't have a circle of reflection, so how did he do it?

    What is the longest lunar distance successfully measured and cleared in the log books?  Is there any recorded measurement at, say, 160 degrees or more?

    Regards
    Brad

    On Jan 21, 2013 1:18 AM, "Frank Reed" <FrankReed{at}historicalatlas.com> wrote:
       
    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