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06-13-21, 04:20 PM

I have taken a series of measurements on the moon. All the results indicate that the "graphic" center of the moon (the center of the moon image in the SH5 sky) does not coincide with its "astronomical" center. The image of the moon SH5 in the sky is about 10.3 arc minutes ahead (in the direction of movement of the celestial sphere) and 2.5 arc minutes lower relative to the real moon (regardless of which hemisphere you are in, the readings of the "old" sextant (without refraction without parallax and without dip), when measuring the altitude of the moon, are underestimated by an average of 2.5 arc minutes.In order for the new sextant to give correct readings of time and altitude for the Moon, I made changes to Page layout.py (link to the updated file in the previous post). It worked well for me, so I am starting work on the Lunar Almanac, which will compensate for the discrepancy of 10.3 arc minutes.

06-13-21, 04:20 PM	#152
Alpheratz Stowaway Posts: n/a Downloads: Uploads:	I have taken a series of measurements on the moon. All the results indicate that the "graphic" center of the moon (the center of the moon image in the SH5 sky) does not coincide with its "astronomical" center. The image of the moon SH5 in the sky is about 10.3 arc minutes ahead (in the direction of movement of the celestial sphere) and 2.5 arc minutes lower relative to the real moon (regardless of which hemisphere you are in, the readings of the "old" sextant (without refraction without parallax and without dip), when measuring the altitude of the moon, are underestimated by an average of 2.5 arc minutes.In order for the new sextant to give correct readings of time and altitude for the Moon, I made changes to Page layout.py (link to the updated file in the previous post). It worked well for me, so I am starting work on the Lunar Almanac, which will compensate for the discrepancy of 10.3 arc minutes.