Venus on 2020-04-22 (JDJ)

Venus on 2020-04-22

Acquisition type: Lucky imaging

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

These images were captured on the night of April 22, 2020 (April 23 in UTC). Venus was ~32% illuminated in this image. The seeing ranged was below average (surprise!) this night.

Imaged with a C8 Evo, ZWO ADC, Baader UV-IR Cut filters, and ZWO ASI224MC. Imaging train was configured to give ~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=0.5ms, Gain=250, Histogram=~50%, ~250 FPS

FireCapture v2.5 Settings

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

Observer=JDJ

Scope=Celestron Nextstar Evolution 8

Camera=ZWO ASI224MC

Filter=RGB

Profile=Venus

Diameter=34.34"

Magnitude=-4.51

FocalLength=3950mm (F/19)

Resolution=0.20"

Filename=2020-04-23-0045_0-J-RGB.avi

Date=2020_04_23

Start=004333.850

Mid=004503.852

End=004633.855

Start(UT)=004333.850

Mid(UT)=004503.852

End(UT)=004633.855

Duration=180.005s

Date_format=yyyy_MM_dd

Time_format=HHmmss

LT=UT -5h

Frames captured=42845

File type=AVI

Extended AVI mode=true

Compressed AVI=false

Binning=no

ROI=372x336

ROI(Offset)=152x72

FPS (avg.)=238

Shutter=0.500ms

Gain=250 (41%)

USBTraffic=100

AutoExposure=off

WBlue=95

AutoHisto=75 (off)

Brightness=1

Gamma=50

WRed=52

HardwareBin=off

HighSpeed=on

SoftwareGain=10 (off)

Histogramm(min)=0

Histogramm(max)=114

Histogramm=44%

Noise(avg.deviation)=n/a

Limit=180 Seconds

Sensor temperature=21.4 °C

Focuser position=30021

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