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
    Re: An exotic lunar distance puzzle
    From: Frank Reed
    Date: 2011 May 2, 21:30 -0700

    Greg, you wrote:
    "I get the dip as about 18* 42' ( that is a lot ! ) and the Moon and Jupiter altitudes as a negative (Hs). Am I on the right track ?"

    Sounds good to me! Also note that the Sun has to be almost directly below the Moon based on the features visible on the Moon by earthshine as well as the horizontal alignment of the horns of the crescent. The angle between the vertical, perpendicular to the horns, and the line to Jupiter is fairly close to 45 degrees, so you can get very close to the right time just by playing any decent astronomy software (e.g. Stellarium, or Solex) back and forth in time around that date until you get those two alignments right. Once you're there, you should be able to identify the brighter stars around the Moon.


    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting 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