Astrophysics

    

Incompatible Solar Altitude Angle During the Apollo 11 Eva from Elementary Ecliptic Calculations.

Authors: Alexis Zaganidis

From elementary ecliptic calculations, we found a solar altitude angle of $07.87°$ (not more than $09.87°$ with respect to the ground of the Tranquility base) instead of a minimal solar altitude angle of $16.2°$ at the official lunar landing site (Tranquility base) during the Apollo 11 EVA (extravehicular activity). Since the sidereal rotation period of the moon is particularly large, during the period were both astronauts were outside the Lunar Module of the Apollo 11 mission, the solar angle variation in the lunar sky was only $0.888°$. Moreover, the smaller solar altitude angle, the larger absolute precision of the solar altitude angle is reached by the shadow measurements on a horizontal surface.

Comments: 10 Pages.

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Submission history

[v1] 2022-11-05 21:13:08
[v2] 2022-11-08 23:24:16
[v3] 2022-11-26 06:21:30
[v4] 2022-12-31 20:18:52

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