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Lunar Montes Alpes shadows video

Posted: 20 February 2021

Open: Friday, 19 February 2021, 1815 MST
Temperature: 74°F
Session: 1598
Conditions: Clear

12" f/8 LX600 w/StarLock
2" 24mm UWA eyepiece
2" 9mm 100° eyepiece
2" 4X Powermate

iPhone 11 Pro Max

SYNCed observatory clock to WWV time signals.

1822 MST: dome OFF (onto PZT).

1823 MST: LX600 ON, StarLock OFF, High Precision OFF.

Viewed the Moon, 102X and 271X. Selected a target (Montes Alpes) for lunar shadows imaging.

Mounted the D850 DSLR at the 12" telescope prime focus.

The Moon, 1/320sec, ISO 400.


Added the 2" 4X Powermate for this photo (1/200sec, ISO 6400). Montes Alpes is just below the center of the photograph.


1900-2100 MST: took a photograph (1/200sec, ISO 6400) of Montes Alpes every 20 minutes over this two-hour span. Seeing was not very good so some images were not very good.

1904 MST: handheld iPhone 11 Pro Max photo (Camera app, Night Mode, 3 seconds, 1X lens) showing the sky (the Moon is overexposed).

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2041 MST: this iPhone photo (Night Mode, 3 seconds, 1X lens, handheld) shows the two brightest stars in the night sky, Sirius (Mag. -1.4) and Canopus (Mag. -0.6), as seen from inside the observatory.

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This is the two-hour video of sunrise at Montes Alpes. The effects of poor seeing are obvious.


Removed the camera and did a tour of the lunar terminator, 406X. There were many nice sights. Then viewed the Moon, 102X.

2108 MST: LX600 OFF.

2112 MST: dome ON.

Close: Friday, 19 February 2021, 2119 MST
Temperature: 50°F
Session Length: 3h 04m
Conditions: Clear

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