Cassiopeia Observatory logo

iPhone Venus, Mercury, Moon

Posted: 25 May 2021

Open: Monday, 24 May 2021, 1833 MST
Temperature: 85°F
Session: 1639
Conditions: Clear, breezy

12" f/8 LX600 w/StarLock
2" 24mm UWA eyepiece
1.25" 15mm eyepiece
Atmospheric Dispersion Corrector

iPhone 11 Pro Max

After opening the observatory I relaxed on the observatory patio bench.

1849 MST: waxing gibbous Moon rose over the hill to the east.

1900 MST: LX600 ON, StarLock OFF, High Precision OFF.

Viewed the planet Venus, 102X. Then viewed Venus, 163X + Atmospheric Dispersion Corrector (ADC). Bright nearly full disk visible.

Mounted the iPhone 11 Pro Max on the 15mm eyepiece + ADC. Tried to do a slo-mo (240fps) video using the Camera app but it would not properly focus. Used NightCap Camera (ISO 32, 1/6393sec, 30 seconds, 30fps, 1X lens) to record the planet. This is a stack of 919 video frames, afocal 163X.


1917 MST: returned to the bench and took this iPhone Camera app (2X lens) photo of the Moon. The hill is reddened by the setting Sun.


1924 MST: sunset. Calm now.

1936 MST: viewed the planet Mercury, 163X + ADC. Very nice view of the crescent phase.

Mounted the iPhone on the 15mm eyepiece + ADC and did a video using NightCap Camera (ISO 32, 1/300sec, 30 seconds, 30fps, 1X). This is a stack of 921 video frames, afocal 163X, showing the crescent phase.


1952 MST: viewed the Moon, 102X and 81X.

Took this handheld iPhone afocal 81X photo of the Moon using NightCap Camera (ISO 32, 1/2000sec, 1X).


2000 MST: last look at the Moon, 102X.

2002 MST: LX600 OFF.

Close: Monday, 24 May 2021, 2012 MST
Temperature: 71°F
Session Length: 1h 39m
Conditions: Clear

Comments are welcome using Email. Twitter users can use the button below to tweet this report to their followers. Thanks.

Previous report

Cassiopeia Observatory Home Page

Back to Top

Copyright ©2021 Michael L. Weasner /