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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Orion North Arrow and the Moon
    From: David Pike
    Date: 2022 Feb 11, 13:31 -0800

    Frank

    As a paid up and practising lunatic since last weekend, I don’t disagree with you at all, but there’s one point I’d like to make to help avoid confusion.  When the meaning isn’t obvious, I think it’s important to always state which north or south the writer is talking about, because they could mean N & S on the celestial sphere, N & S on the observer’s horizon, and one I hadn’t heard of before N & S on the Ecliptic.  The reason I mention this is the large amount of copying and pasting which goes on with ‘blogs’ on the w.w.w.  The trouble is, statements on astronomical blogs get transferred, often précised and with caveats removed, onto survival blogs where readers are usually only interested in the direction of points on their visual horizon.  Early last weekend the Moons horns were pointing close enough to south on my visual horizon at 53N for long enough to be of practical use to me.  However, by PM on Monday 7th*, the attached photographs taken from my garden show that whilst the line of the Moon’s horns might be good for an astronomer who understands what they’re looking at, the line can’t always be relied upon by a traveller in the wilderness at night wanting to know where south is on their visual horizon.  I can’t remember now exactly which azimuth the line cut the horizon.  It was somewhere between 150 and 160 DaveP

    * Times were UT, and my position was 53 10'N 000 32'W

    File:


       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    NavList ID 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