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Re: Sun Polynomials again
From: Bill Murdoch
Date: 2002 Oct 30, 22:05 EST
From: Bill Murdoch
Date: 2002 Oct 30, 22:05 EST
In a message dated 10/30/02 12:41:14 AM Eastern Standard Time, gtalge@PE.NET writes:
NAO Technical Note Number 55, The Phase Correction for Venus, by B D Yallop describes the correction. The summary reads:
The basis of the additional corrections for Venus, which allow for parallax and phase, on page A2 of the Nautical Almanac from 1952 to 1984 is described. For Nautical Almanac 1985 onwards the GHA and Declination of Venus in the main tables will be given for the centre of light so that no phase corrections is required. The method of correcting the GHA and Declination of Venus from the centre of disk to centre of light is described.
1981 May
H M Nautical Almanac Office
Royal Greenwich Observatory
Herstmonceux Castle
Hailsham East Sussex BN27 1RP
Bill Murdoch
There is also a statement that "Corrections have been incorporated
in the data for Venus and Mars to allow for their phase, so that the
position obtained from the polynomial coefficients...is for the
observed centre-of-light." Not sure what this correction is and
how to apply it yet for the planets.
NAO Technical Note Number 55, The Phase Correction for Venus, by B D Yallop describes the correction. The summary reads:
The basis of the additional corrections for Venus, which allow for parallax and phase, on page A2 of the Nautical Almanac from 1952 to 1984 is described. For Nautical Almanac 1985 onwards the GHA and Declination of Venus in the main tables will be given for the centre of light so that no phase corrections is required. The method of correcting the GHA and Declination of Venus from the centre of disk to centre of light is described.
1981 May
H M Nautical Almanac Office
Royal Greenwich Observatory
Herstmonceux Castle
Hailsham East Sussex BN27 1RP
Bill Murdoch
