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Contains:  NGC 6946, NGC 6939
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NGC 6946 (testing RST-135 mount), 


            Paul Muskee
NGC 6946 (testing RST-135 mount)

NGC 6946 (testing RST-135 mount)

Technical card

Resolution: 3954x2721

Dates:May 14, 2019

Frames: 60x371"

Integration: 6.2 hours

Avg. Moon age: 10.05 days

Avg. Moon phase: 76.90% job: 2711226

RA center: 20h 33' 35"

DEC center: +60° 18' 18"

Pixel scale: 2.304 arcsec/pixel

Orientation: 175.694 degrees

Field radius: 1.536

Locations: Lingemeer (backyard @ home), Lienden, Gelderland, Netherlands

Data source: Backyard


I was testing a new mobile mount, the Rainbow Astro RST-135.

Therefore, the aim of this image was testing this very new mount. I used a color CMOS-camera to keep things easy. The mount weighs only 3.5 kg and can carry 13.5 kg without need for any counterweights, so very handy for travel. It has harmonic drive system.

Unfortunately my ESPRIT 80 did not had auto-focus at the time of making this image (so not everything is as sharp as it should be), but yesterday I installed the Pegasus FocusCube v2 on the ESPRIT 80 which is also looking very nice.

I am very impressed by the tracking from this mount, it seems comparable to my Mesu-Mount 200 which is pretty good. The system is harmonic drive with no backlash at all, that also makes dithering very quick which I like very much. My FWHM plot looked really nice with this mount and also the HFR in SGP was flatlined :-).

I still need to work on my backfocus for the ESPRIT 80 and this image has taken mostly during grey nights.
Working with a color camera again also showed me how much better monochrome is :-).

Hopefully I can use this mount soon in Morocco where I can really see what it can do.



Paul Muskee
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6946 (testing RST-135 mount), 


            Paul Muskee