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: GMT from Lunar Photo
    From: Murray Peake
    Date: 2022 Jan 6, 23:43 +0100
    Assuming the photo was taken at the moment of occultation of the star at 1 o'clock, and using the lat/long as in Antoine's reply, David Herald's Lunar Occultation program gives the time of disappearance as 1:11:30.4 GMT

    Murray

    On Thu, Jan 6, 2022 at 9:32 PM Antoine Couëtte <NoReply_Couette@fer3.com> wrote:

    Happy New Year to all

    From Mr. Google Earth Pro, Sky Village at N31°55.8' / W109°07.2' Altitude 1450 m

    STARTING POINT (before iterations if required)

    Approximate time 01:13 UT on Jan 05th, 2022

    Moon UL = 15°58.3'  Moon LL = 15°25.6' , hence Moon Augmented Diam = 32.6'

    Augmented D showing as 157 mm on my computer screen, 

    Given its position relatively to the Moon Horns, bottom right "bright spot" should yield a fairly resonable Lunar. It shows at 207.5 mm from the Far Limb on my screen, hence at an angle of 0°43.119' from the far limb of the Moon.

    Moon Coordinates close to RA = 21h21m12,57s DEC = -20°42'57"

    Unable so far to find any "resonable body" to match this bright spot. Saturn is too far away in azimuth (about 4° too much to the right). This Planet or Star does not either match of the 81 Standard Celnav French Ephémérides Nautiques Stars, nor any from the full list of the US NAL ..... No other planets seem close.

    Maybe Delta Capriconi might work, but no time for me to compute its apparent position to-nite. Well ... probably not, too south declination (20° or so) ...

    When I have time I will attempt digging something from the star catalogs.

    If no joy ultimately, I will be mulling over a totally different approach.

    Antoine M. "Kermit" Couëtte

       
    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