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
    or...
       
    Reply
    Re: Venus in daylight in southern latitudes
    From: David C
    Date: 2021 Oct 21, 01:04 -0700

    Frank wropte

    Most observers look too low when told to look at a spot that's 45° or 60° or 75° high. Test it at night with stars of known altitude.

    My problem  may be that I am not looking high enough. This afternoon I laid on a piece of carpet on the damp grass and tried to look from the zenith down rather than the horizon up but was unsuccessful. Than at about 8 30pm local time I went outside. The sky was nearly dark and I could see

    Venus alt 38°

    Jupiter alt  62°

    Saturn alt 67°

    62° and 67° arre very very very high!  The position of the zenith is very deceptive. As I tilted my head back I thought that I was looking past the zenith to the south. Tomorrow if the sky is clear I will lay on my back and not waste time scanning the lower altitudes.

    I have a true north mark on a hill that I have detemined by noon observations. Today I aligned a polar diagram in an app with north and the app told me where to look for venus.

    Now something I have just thought of. Running approximately east-west is a fence. If I measure the height of the fence a  little bit of trig will tell me how far my head neads to be from the fence for the required altitude. I can use the fence to obscure the part of the ky I do not need to scan. Maybe even block out the sun.

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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