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: A strange set of Venus LoPs.
    From: Antoine Couëtte
    Date: 2020 Apr 6, 10:14 -0700

    05 Apr 2020 at 16:00:00 UT1, TT-UT = close from +69 s (OK ... do not cane me ... it is not quite necessary mentioning it here given the slow Venus RA and Dec hourly variations).

    From Antoine to Tony ...

    At 16:00:00 UT1 Venus GHA = 015°38.4' , Dec = N 24°20.2' .

    These values do not match by quite far the ones you have indicated for 16:00:00  ( 015°24.1' , N 24°34.6').

    Let us continue with your data :

    From N60°06.6 E 029°56.8' with Height of Eye = 3 m , standard Temperature and Pressure

    Venus 16h04m30.0s UT1, H = 42°00.4' (i.e. value corrected for instrument error), get intercept = -1.1 NM (away) / Azimut 243.1°

    Venus 16h21m55,0s UT1, H = 40°01.9' (i.e. value corrected for instrument error), get intercept = -1.5 NM (away) / Aimut 247.7 °

    Both intercepts look reasonable and quite good actually.

    Hence my suggestion would be first carefully re-checking your Venus data for GHA and Dec.

    Best Regards

    Antoine

       
    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