Venus on 2020-04-18 (JDJ)

Venus on 2020-04-18

Acquisition type: Lucky imaging

Continuing my imaging of Venus during the 2019-2020 evening apparition...

These images were captured on the night of April 18, 2020. Venus was ~35% illuminated in this image. The seeing ranged from below average to average this night. We had a pretty good string of clear nights through mid-April, so I managed quite a few imaging sessions recently. I'd trade the last half dozen for a night of above average seeing though...

Imaged with a C8 Evo, ZWO ADC, Baader UV-IR Cut filters, and ZWO ASI224MC. Imaging train was configured to give me ~F/20. Image capture using Firecapture (see below for exposure settings). Stacking in AutoStakkert3 (best 10% of ~42000 frames captured over 180 seconds). Color balancing and Wavelet sharpening in Registax6. Derotated and combined three images in WinJUPOS.

Exposure settings for UV-IR Cut Filter images: Shutter=0.25ms, Gain=250 (33%), Histogram=~50%, ~250 FPS

FireCapture v2.5 Settings

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

Observer=JDJ

Scope=Celestron Nextstar Evolution 8

Camera=ZWO ASI224MC

Filter=RGB

Profile=Venus

Diameter=32.34"

Magnitude=-4.50

FocalLength=3950mm (F/19)

Resolution=0.20"

Filename=2020-04-18-2336_1-J-RGB.avi

Date=2020_04_18

Start=233437.764

Mid=233607.754

End=233737.744

Start(UT)=233437.764

Mid(UT)=233607.754

End(UT)=233737.744

Duration=179.980s

Date_format=yyyy_MM_dd

Time_format=HHmmss

LT=UT -5h

Frames captured=42815

File type=AVI

Extended AVI mode=true

Compressed AVI=false

Binning=no

ROI=372x336

ROI(Offset)=208x0

FPS (avg.)=237

Shutter=0.250ms

Gain=250 (41%)

HighSpeed=on

AutoHisto=75 (off)

USBTraffic=100

WRed=52

HardwareBin=off

Gamma=50

Brightness=1

WBlue=95

AutoExposure=off

SoftwareGain=10 (off)

Histogramm(min)=0

Histogramm(max)=131

Histogramm=51%

Noise(avg.deviation)=n/a

Limit=180 Seconds

Sensor temperature=18.1 °C

Focuser position=30012

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