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: What does the Analemma depict?
    From: Steve E. Bryant
    Date: 2020 Feb 12, 10:59 -0800

    My question regarding the analemma:      

    See: http://www.perseus.gr/Images/solar-analemma-070000-UTC.jpg  

    I'm not sure my desire is a realistic one but as I ask the question perhaps you will understand that which is a curiosity to me.

    I would like to see the analemma only with small lines superimposed across the images of the sun representing the plane of the ecliptic, and or the plane of the celestial equator as they would intersect each image of the sun. 

    A different but graphicly proportional representation of the analemma, or portions thereof, would likely be necessary to show the details across the sun's image that I'm interested in seeing across the 48 different images of the sun shown in the analemma. Or, if no less than eight (8) specifically select images would show the intersections of interest.  As I think about this now, it might be easy enough to show the relationships; but, I've never seen such collected precisely as I have described particularly with respect to the analemma.    

    If such a representation were attempted, then the plane or planes, depending upon whether only one or both, of the ecliptic and or the celestial equatorial, planes were depicted.  In order to see, i.e., depict, the desired relationship(s), the plane(s) would best be depicted rotated by 45°.  

    We always see, on the printed page, the planes (equatorial and celestial) as they eliminate from the earth.  I would like to see, in print, those planes as they cross the sun during the course of the year.

    Steve, OCBC/USPS  

    35 33

    97 37

    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