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The Waxing Gibbous Moon

Posted: 16 September 2021

Open: Wednesday, 15 September 2021, 1812 MST
Temperature: 81°F
Session: 1667
Conditions: Clear, very hazy

12" f/8 LX600 w/StarLock
2" 24mm UWA eyepiece
2" 9mm 100° eyepiece
2" 2X Powermate
2" Variable Polarizing Filter


SYNCed the observatory clock to WWV time signals.

Relaxed on the observatory patio bench for a few minutes.

1831 MST: sunset.

1835 MST: LX600 ON, StarLock OFF, High Precision OFF.

Viewed Mercury, 102X and 271X. Viewed Venus, 271X.

Viewed the waxing gibbous Moon, 102X and 271X. Seeing was not good, but there were nice views at times.

Mounted the D850 DSLR at prime focus. Took this photo of the Moon (1/320sec, ISO 400).


Added the 2X Powermate. Took these photos of the Moon (ISO 4000, 1/500sec, 1/500sec, and 1/400sec, respectively).


1903 MST: viewed Saturn, 102X and 271X.

Returned to the bench to wait for Jupiter to rise a little higher in the southeastern sky.

1916 MST: Jupiter and the four Galilean Moons, 271X. Added one of the Variable Polarizing Filters to dim the planet somewhat, but it did not improve the view. The best view was without the filter.

Viewed Jupiter, 102X.

1929 MST: LX600 OFF.

Close: Wednesday, 15 September 2021, 1939 MST
Temperature: 76°F
Session Length: 1h 27m
Conditions: Clear, very hazy

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