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: About Lunars, part 4
    From: Chuck Griffiths
    Date: 2002 Mar 19, 09:23 -0500

    First, I have a set of observations from last night that I'm hoping you might
    have a look at George, and see if it looks like I'm still headed in the right
    direction. From approximately 27-42.0 N, 82-44.2 W I took a set of observation
    as follows:
    (All times GMT 19 March followed by altitudes Degree-Minutes)
    Venus 00:11:41 7-50.6
    Moon 00:12:48 44-52.6
    Venus 00:14:02 7-25
    Moon 00:14:02 45-25.6
    Lunar Distances
    00:14:59 37-43.4
    00:15:27 37-43.2
    00:16:01 37-43.0
    Venus 00:16:36 6-43
    Moon 00:17:31 43-51.6
    Venus 00:18:09 6-24
    Moon 00:19:09 43-30
    I roughly averaged the sights and used the following for my calculations:
    Venus 7-5.6
    Moon 44-12.5
    Distance between 37-43.2
    From which I calculated:
    B .69733
    P 38.43635
    R 6.65151
    d 37.97333
    D 38.72479
    SD 15.1995
    HP 55.1
    D1 (00:00:00) 38.58036
    D2 (01:00:00) 39.03829
    T 00:18:55 v. real time of observation of 00:15:29
    So, based on the fact that the Moon was rather high and, by my observations, was
    moving at an apparent speed of about 24 arc minutes an hour can I assume that
    some of my error is due to "parallactic retardation"? Or, did I make some more
    basic mistake?
    One other question from Part 4, how do Bruce's tables compare to the tables that
    used to be in Bowditch?
    This e-mail and any files transmitted with it are confidential and may
    be legally privileged or otherwise exempt from disclosure under
    applicable law. This e-mail and its files are intended solely for
    the individual or entity to whom they are addressed and their content
    is the property of Smiths Aerospace.  If you are not the intended
    recipient, please do not read, copy, use or disclose this communication.
    If you have received this e-mail in error please notify the e-mail
    administrator at postmaster{at}si.com and then delete this e-mail, its
    files and any copies.
    This footnote also confirms that this e-mail message has been scanned
    for the presence of known computer viruses.

    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