.................................February 11, position of the Sun
Date: February 11
Location: Al Jizah (Giza)
Sunrise: 06:40
Top R.A. = 21h 35m 51.39s = VE-D (vernal equinox - Sun's position on February 11)
Distance = 0.986982648
The average distance from the Earth to the Sun = 149,597,870 km = 1 Astronomical unit (1AU)
Height of the Great Pyramid = 14,765.05019 cm
February 11: Earth-Sun (distance) = 147,650,501.9 km
147,650,501.9 : 149,597,870 = 0.986982648
Top RA = 21h 35m 51.39s = VE-D = 21.59760833 hours
Right ascension (RA): 1 hour = 15 degrees
21.59760833 hours = 323.964125 degrees
1 year = 365.242 days
365.242 - 323.964125 = 41.277875 days
January = 31 days
41.277875 - 31 = 10.277875 days = 10 days, 6 hours, 40 minutes and 8.4 seconds = February 11, sunrise at Al Jizah (Giza).
The shortest distance between the Earth and the Sun (perihelion) is about 147,166,462 km. This point in the Earth's orbit occurs on January 3.
The Earth is farthest away from the Sun on July 4 (aphelion) when it is about 152,100,000 km from the Sun.
1 year = 365.242 days
365.242 : 2 = 182.621 days = January 3 - July 4
Tangent of the Pyramid's angle of rise = 1.273240621
182.621 : 1.273240621 = 143.4300768 days = February 11 (B) - July 4 (C) = September 21 (A) - February 11 (B)
143.4300768 x 2 = 286.8601536 days = 365.242 : 1.273240621 = September 21 (A) - February 11 (B) - July 4 (C)
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Daylight map (Egypt- Al Jizah, February 11, 06/6 am, Minutes 40):
http://www.timeanddate.com/worldclock/sunearth.html
Sunrise and Sunset Calculator (location Egypt-Cairo):
http://www.timeanddate.com/worldclock/sunrise.html?month=2&year=2009&obj=sun&afl=-12&day=1
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