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: How many ways to define a day?
    From: Dave Walden
    Date: 2021 Jun 16, 13:20 -0700

    https://hpiers.obspm.fr/eop-pc/models/constants_mobile.html

    Conventional duration of the sidereal dayDS=D/k 86164.090 530 832 88sexactfrom k given in Aoki et al, 1982, "The New definition of Universal Time", Astron. Astrophys., 105, 359-361 (1982)
    Ratio mean solar day/stellar dayk' 
    1.002 737 811 911 354 48
    -exactIERS Conventions (2003). Value consistent with the nominal Earth angular velocity ΩN
    Stellar dayD/k'=2 π/ΩN86164.098 903 691sexactFrom k'. The stellar day referred to the stars is not affected by the precession and therefore is slightly larger than the sidereal day
       
    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