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: Your Venus West Lunar
    From: Chuck Griffiths
    Date: 2002 Mar 21, 11:38 -0500

    Bruce brought this error to my attention and I thought I'd better correct it for
    anyone else playing with my observations from the other night. In the list of
    altitudes I provided I substituted the calculated Hc for my observed Hs for the
    second Moon sight. Here, to correct my mistake and to provide the opportunity
    for anyone that wishes to correct my altitudes based on calculated Hc's I'll
    provide the observations again only more clearly.
    From a position of approximately 27-42.2N, 82-44.2W and a height of eye of about
    10 feet. I took the following sights.
    Body    Time        Hs (corrected for IE)   Calculated Hc   Intercept
    Venus   00:11:41    7-50.6          7-40.7      0
    Moon    00:12:48    44-52.6         45-41.3     to 1.2
    Venus   00:13:27    7-25            7-17.3      away 2.5
    Moon    00:14:02    44-36           45-25.6     to .5
    Then the lunar distances, then these altitudes:
    Body    Time        Hs (corrected for IE)   Calculated Hc   Intercept
    Venus   00:16:36    6-43            6-35.5      away 3.4
    Moon    00:17:31    43-51.6         44-41.1     to 1
    Venus   00:18:09    6-24            6-15        away 2.2
    Moon    00:19:09    43-30           44-20.3     to .5
    ____________________Reply Separator____________________
    Subject:    Your Venus West Lunar
    Author: Stark4677---.com
    Date:       3/21/02 11:11 AM
    I started to work your lunar and noticed something odd. The first two
    altitudes of the moon are increasing, and a few minutes later, the second two
    are decreasing. Calculated the apparent altitude of the moon's lower limb and
    decided the second of the first two altitudes should be 44? 25.'6, not 45?
    Check it out and, if you discover a mistake was made, you can post it
    Wish I had a dollar for every time I put down one number when I meant
    another, or just plain read a number wrong.
    I'll go ahead and work the observation and let you know what I get.
    Received: from lucky.si.com ([]) by smtpgwy.si.com with SMTP
      (IMA Internet Exchange 3.14) id 0044F89F; Thu, 21 Mar 2002 11:13:43 -0500
    Received: from CHECKERS2.si.com (checkers.si.com [])
        by lucky.si.com (8.9.3+Sun/8.9.3) with ESMTP id LAA17098
        for ; Thu, 21 Mar 2002 11:11:32 -0500 (EST)
    From: Stark4677---.com
    Received: from challenger.si.com (unverified) by CHECKERS2.si.com
     (Content Technologies SMTPRS 2.0.15) with SMTP id
     for ;
     Thu, 21 Mar 2002 11:13:52 -0500
    Received: by challenger.si.com; id LAA22519; Thu, 21 Mar 2002 11:11:26 -0500
    Received: from nodnsquery( by challenger.si.com via smap (V5.5)
        id xma022423; Thu, 21 Mar 02 11:11:16 -0500
    Received: from Stark4677---.com
        by imo-d02.mx.aol.com (mail_out_v32.5.) id 1.124.daddceb (4592)
         for ; Thu, 21 Mar 2002 11:11:11 -0500 (EST)
    Message-Id: <124.daddceb.29cb601e---.com>
    Date: Thu, 21 Mar 2002 11:11:10 EST
    Subject: Your Venus West Lunar
    To: griffiths_chuck{at}si.com
    MIME-Version: 1.0
    X-Mailer: AOL 5.0 for Mac sub 39
    Content-Type: text/plain; charset="ISO-8859-1"
    Content-Transfer-Encoding: quoted-printable
    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