Ten Day Old Moon

Object Details:

Visual magnitude:   -10.8              Apparent size:    29.9′
Diameter:   3475 km.                   Distance:   1.33 light seconds

When the Moon is high and bright, I am sometimes still tempted to do some home imaging, if the sky is clear. I will usually take a video of the Moon while I wait for full darkness.

This is what I got after processing 500 video frames recorded last Thursday, with a ten day old Moon. It came out with a rather pinkish colour this time, possibly due to bushfire smoke or my still evolving photographic skills, I can’t be sure which.

I didn’t like the pink though, so I faded most of it out.

One thing noticeable in the image is the number of white ejecta rays emanating from some of the larger craters. They show up in the highland areas but contrast especially well in the darker maria areas.

Some of the craters are two billion years old – and so – by implication – is the associated ejecta. That’s a long time for debris to be lying around. I wonder how long the Apollo astronauts footprints will remain on the surface. Possibly a lot longer than the lifetime of human civilisation!

The Lunar magnitude of -10.8 is about seven magnitudes brighter than the magnitude -4 Venus I saw low in the West. That’s about 650 times brighter. It’s left me wondering about the magnitude of that wretched new LED street light they recently installed to thwart my astronomy activities. A few magnitudes more than a full Moon, I reckon. 😨 

End of Blog

Technical stuff:

Image & Processing:

Date:  2019-11-07
Exposure:   500 x 0.045138 sec
Gain:   0

Location:  outer suburban
Conditions:  clear

Image acquisition:  SharpCap video.
Method: best 50% of 500 frames

Stacked: Autostakkert
Image post-processing:
Cropping: yes


Telescope: SkyWatcher Esprit  Type: 120 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: LP Guiding: No

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=8 fps
Timestamp Frames=Off
White Bal (B)=50
White Bal (R)=53
Cooler Power=100

Target Temperature=-10
Auto Exp Max Gain=300
Auto Exp Max Exp M S=30000
Auto Exp Target Brightness=100
Mono Bin=Off
Anti Dew Heater=On
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


Images © Roger Powell

2018-03-10 Telescope & Roger



  1. Beautiful and informative!
    I have always felt akin to the moon and night sky.
    My pooch Coop and I take a late night walk every night to see the moon and stars.
    By the way…I came by via disperser’s WP site. 🙂

    Liked by 1 person

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