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: GHA Aries long term Table?
    From: Greg Rudzinski
    Date: 2014 Dec 17, 08:51 -0800

    Sam,

    Try extending the existing tables for a few years using the USNO web sight. Correct table 4 part a. so that year 2017 and beyond will match NSNO data. If E and Dec table values are off by more than a minute then a small correction there can be made. Photo copy corrected table and keep with the trig calculator.

    Greg Rudzinski

     

    From: Samuel L
    Date: 2014 Dec 16, 19:05 -0800

     


    2015 is coming....surely.

    HO 249 Volume 1 page 340 has "Table 4- GHA Y for the years 2006 to 2014" which is a very compact way to determining GHA Y (Aries) for stars.

    See here (page 339)-

    http://www.waypointamsterdam.com/Han...Pub249Vol1.pdf
     
    I use it instead of carrying around the NA. (I can easily calculate Hc and Az using the Spherical Trig formulas so I can reduce the amount of paper on board).

    But, that sheet will expire this year. Do you know of the same Table 4 for the coming years?

    Or rather....do you know of quick, accurate way to determine GHA Aries?

    Thanks,
     
    Sam L.

       
    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