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: Calculate star rise or set time?
    From: Gary LaPook
    Date: 2015 Nov 19, 04:02 +0000
    It simple. Just rearrange the standard cosine formula for calculating Hc to solve for HLA. Input latitude, declination, altitude of zero and then solve for LHA. Then subtract SHA from LHA to determine the requisite GHA Aries and then look up that GHA Aries in the Nautical Almanac.

    gl


    From: Samuel L <NoReply_SamuelL@fer3.com>
    To: garylapook@pacbell.net
    Sent: Wednesday, November 18, 2015 6:15 PM
    Subject: [NavList] Calculate star rise or set time?

    Is there a simple way to calculate when a star will rise or set as viewed from a specific Longitude?  I know that when LHA equals your Longitude the celestial body is on your meridian but I can't seem to figure out how calculate a star's rise and set time.
    Thanks,
    Sam


       
    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