STATUS
proposed
approved
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proposed
approved
editing
proposed
editing
proposed
The resolution limit of present astronomical instruments is about 200 micro arcseconds, corresponding to a solid angle cut out by a cone with polar angle of 0.0001 arcseconds. This constant , a , expresses the smallest resolvable solid angle as a fraction of the full solid angle. One might also say that at current top resolution, the full celestial sphere contains 1/a resolvable pixels.
proposed
editing
editing
proposed
The resolution limit of present astronomical instruments is about 200 micro arcseconds, corresponting corresponding to a solid angle cut out by a cone with polar angle of 0.0001 arcseconds. This constant a expresses the smallest resolvable solid angle as a fraction of the full solid angle. One might also say that at current top resolution, the full celestial sphere contains 1/a resolvable pixels.
Center fo for High Angular Resolution Astronomy, <a href="http://www.chara.gsu.edu/CHARA/">CHARA</a>
proposed
editing
editing
proposed
The resolution limit of present astronomical instruments is about 200 micro arcseconds, corresponting to a solid angle cut out by a cone with polar angle of 0.0001 arcseconds. This constant a expresses the smallest resolvable solid angle as a fraction of the full solid angle. One can might also say that at current top resolution, the full celestial sphere contains 1/a resolvable pixels.
Center fo High Angular Resolution Astronomy, <a href="http://www.chara.gsu.edu/CHARA/">CHARA</a>
(1-cos((0.0001/60/60)*(Pi/180)))/2.
Inverse:
1.7018068118460879832481638181180323127935597506413188919...e+19
(PARI) (1-cos((0.0001/60/603600)*(Pi/180)))/2
allocated for Stanislav SykoraDecimal expansion of the fraction of the full solid angle subtended by a cone with the polar angle of 10^(-4) arcseconds.
5, 8, 7, 6, 1, 0, 7, 6, 3, 4, 7, 7, 4, 4, 7, 1, 4, 3, 7, 9, 0, 0, 7, 9, 0, 8, 9, 9, 4, 0, 6, 7, 7, 0, 0, 3, 1, 1, 3, 6, 2, 9, 8, 5, 2, 6, 1, 9, 5, 0, 6, 8, 5, 1, 9, 7, 0, 3, 7, 8, 7, 4, 8, 6, 2, 8, 5, 3, 4, 7, 6, 8, 4, 7, 7, 7, 1, 2, 6, 4, 6, 1, 7, 5, 7, 0, 8, 5, 7, 5, 6, 8, 6, 5, 2, 7, 5, 1, 2, 1, 6, 0, 9, 3, 7
-19,1
The resolution limit of present astronomical instruments is about 200 micro arcseconds, corresponting to a solid angle cut out by a cone with polar angle of 0.0001 arcseconds. This constant a expresses the smallest resolvable solid angle as a fraction of the full solid angle. One can also say that at current top resolution, the full celestial sphere contains 1/a resolvable pixels.
See A234597 for more details on solid angle fractions.
Stanislav Sykora, <a href="/A243598/b243598.txt">Table of n, a(n) for n = -19..1980</a>
(1-cos(0.0001/60/60*(Pi/180)))/2.
5.8761076347744714379007908994067700311362985261950685197...e-20
(PARI) (1-cos(0.0001/60/60*(Pi/180)))/2
Cf. A234597.
allocated
nonn,cons,easy
Stanislav Sykora, Jun 07 2014
approved
editing