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Re: Star-to-Star Distances and Stellarium
From: Andrés Ruiz
Date: 2014 Aug 24, 10:26 +0200
From: Andrés Ruiz
Date: 2014 Aug 24, 10:26 +0200
Using my free software:
output:
--
Andrés Ruiz
Navigational Algorithms
http://sites.google.com/site/navigationalalgorithms/
output:
24/08/2014
01:38:37 UT1
Geocentric equatorial coordinates
Vega
GHA = 77.554537 º = 77º 33.3'
Dec = 38.804477 º = 38º 48.3'
Deneb
GHA = 46.426383 º = 46º 25.6'
Dec = 45.338146 º = 45º 20.3'
Sextant Error by a Star-Star Distance
Input data:
Star 1: Dec = 38.804477 GHA = 77.554537
Star 2: Dec = 45.338146 GHA = 46.426383
Star-star distance - sextant: DSSs = 23.846667 = 23º 50.8'
Position of the observer:
B = 43.316667 = 43º 19.0'
L = -2.000000 = -2º 0.0'
hEye = 1.830000
Atmospheric parameters:
P = 1010.000000
T = 10.000000
Calculated altitudes:
Hc1 = 34.844499
Z1 = 293.144546
Hc2 = 58.559968
Z2 = 289.383789
Refraction:
R1 = 0.023250
R2 = 0.009900
Apparent altitudes:
Ha1 = 34.867749
Ha2 = 58.569868
Star-star distance: Calculated and Observed
DSSc = 23.846449 = 23º 50.8'
DSSo = 23.860022 = 23º 51.6'
Sextant error = Index Error + Instrumental Error:
Arc error = -0.013573º = -0.814375'
best regards,
Andrés Ruiz
Navigational Algorithms
http://sites.google.com/site/navigationalalgorithms/
File:
