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
    Re: Star locations?
    From: Andrés Ruiz
    Date: 2014 Sep 16, 15:59 +0200
    sidereal hour angle. Angular distance west of the vernal equinox; the arc of the celestial equator or the angle at the celestial pole between the hour circle of the vernal equinox and the hour circle of a point on the celestial sphere, measured westward from the hour circle of the equinox through 360°. Angular distance east of the vernal equinox, through 24 hours, is RIGHT ASCENSION. (BOWDITCH)


    SHA = GHA - GHA_Aries

    RA = 360-SHA  [deg]
    RA = RA/15       [h]


    Imágenes integradas 1

    2014-09-16 15:26 GMT+02:00 Samuel L <NoReply_SamuelL@fer3.com>:

    I've having a hard time in figuring out or understanding the Star SHA figure and what it means.

    For example- Arcturus is 145d 55.2 min. with a declination of 19 d 6.6 min North.

    What in the world does that mean? I assume it someway corresponds to RA and Dec (RA, of course is meaningless...to say it references off of Aries or the Spring equinox is even MORE meaningless as I would understand it better if were referenced off some real place like Greenwich).

    Can someone please explain that stuff?

    Thank you,

    Sam Lohengrin

    View and reply to this message




    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/

    File:


       
    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