First Quarter Moon imaged in video format with my ZWOASI071 and stacked in Autostakkert.

This was taken on the same evening as my previous post about the Rupes Recta fault line.

If you have a keen eye and know where to look, Rupes Recta is faintly visible in the shadows of the terminator in this image, which was not exposed with that object in mind.

Object Details:

Visual magnitude:  -10.4.
Apparent size:  32.4′.
Diameter:   3475 km.
Distance:   1.23 light seconds.
Altitude:  35° above NW horizon.


Exposure:  3min video 165 frames 0.0178 sec.
Gain:  0.
Date:  2019-06-11.
Location:  outer suburban.
Conditions: clear.


Image acquisition software:  SharpCap,
Image post-processing:  PIPP, Autostackert, GIMP.
Cropping:  yes (and rotated).


Telescope: SkyWatcher Esprit  Type: 120ED triplet refractor
Focal: 840 mm F/7 Mount: SkyWatcher EQ6-R Pro
Camera: ZWO ASI 071 MC Pro Type: CMOS 28.4mm 16 Mpx
Optical aids: Flattener: Y; filter: N Guiding: No
Polar aligning: QHYCCD PoleMaster Polar Error: na

Geek Log:

[ZWO ASI071MC Pro]
Debayer Preview=On
Output Format=SER file (*.ser)
Capture Area=4944×3284
Colour Space=RAW16
Hardware Binning=Off
Turbo USB=40
Frame Rate Limit=Maximum
Timestamp Frames=Off
White Bal (B)=50
White Bal (R)=53
Cooler Power=100
Target Temperature=-15
Auto Exp Max Gain=300
Auto Exp Max Exp M S=30000
Auto Exp Target Brightness=100
Mono Bin=Off
Anti Dew Heater=Off
Banding Threshold=35
Banding Suppression=0
Apply Flat=None
Subtract Dark=None
#Black Point
Display Black Point=0
#MidTone Point
Display MidTone Point=0.5
#White Point
Display White Point=1

Image © Roger Powell



  1. I opened the previous post in a new window for easier comparison. It was clear I was looking in the right place. But, I was unable to see a faint line of the fault. 😦
    Points for trying?

    Liked by 1 person

    1. Hi Jim.
      Yes, of course!
      It is very clear in the first post because I overexposed the image but the second post was exposed for the whole Moon, leaving RR in near darkness.


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