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Re: How many ways to define a day?
From: Dave Walden
Date: 2021 Jun 16, 13:20 -0700
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 day | DS=D/k | 86164.090 530 832 88 | s | exact | from k given in Aoki et al, 1982, "The New definition of Universal Time", Astron. Astrophys., 105, 359-361 (1982) |
| Ratio mean solar day/stellar day | k' | 1.002 737 811 911 354 48 | - | exact | IERS Conventions (2003). Value consistent with the nominal Earth angular velocity ΩN |
| Stellar day | D/k'=2 π/ΩN | 86164.098 903 691 | s | exact | From k'. The stellar day referred to the stars is not affected by the precession and therefore is slightly larger than the sidereal day |
