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: Moon Venus Lunar - Interpretation of results
    From: Jim Rives
    Date: 2020 Jan 30, 18:59 -0800

    Well, it certainly helps to actually use the right data.  Sloppy worksheetmanship on my part.  My apologies.  Changing the AP to 42d 58.8N and 70d 57.4W didn't change the error, as you predicted.  But with that changed AND using the right LD cleared of 38.3 my error dropped to 1.1'.   So, if I was to explain to an imaginary someone what this means I might say that I predicted that at GMT 2210 the LDcleard would be 16d 11.3', but I measured and cleared to  16d 12.2', meaning that the GMT was actually later than 2210.  How much?   1.1' times 4 seconds, or 22:10:04?   Is that correct?  And I still couldn't explain where the "approximate error in Longitude of 0d 28.8" comes from or what exactly that means.  My longitude could be off 28.8d?  

    Thank you for taking the time to comment on this, Frank.  I think way way back, about 7 weeks ago, when we first tried the moon-venus sight in Mystic when I could barely get the sextant in a weird enough angle to capture both images.  Soon I may even be able to talk intelligently about  what I'm doing. It is great fun trying though.  Tomorrow I'll try the sun and venus.  Perhaps get lucky and even pick out venus at mid-day.  

    Jim Rives 

       
    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