Venus on 16th April 2023 - UV filter

Its been some time since I imaged Venus.

 

I've changed to a Chroma Bessel UV filter and a Pierro Astro Mark 3 ADC since both are said to transmit UV light quite well.

 

I'm also trying to catch Venus in the evening sky as early as I can so I don't have to compete with atmospheric turbulence and haze near the horizon. This run was at 2143 hrs when Venus was 22 degrees above the horizon.

 

Even with that, turbulence was quite bad tonight so Im pleased to get something.

 

Celestron C9.25 scope. Baader VIP x2 Barlow.

 

 

FireCapture v2.7.10 Settings

------------------------------------

Camera=ZWO ASI290 MM

Filter=UV

Profile=Venus

Diameter=15.39"

Magnitude=-4.08

FocalLength=6550mm

Resolution=0.09"

Duration=300.005s

Frames captured=13689

FPS (avg.)=45

ROI=ROI(Offset)=416x200

Shutter=21.92ms

Gain=423 (70%)

Gamma=50

Histogram=91%

eADU=0.057

Limit=5 Minutes

Sensor temperature=21.3°C

Focuser position=0

Done