Imaging telescopes or lenses: Sky-Watcher Esprit 120ED Super APO Triplet
Imaging cameras: ZWO ASI 071MC PRO
Mounts: Orion Atlas Pro AZ/EQ · SkyWatcher Pillar pier
Guiding telescopes or lenses: Sky-Watcher Evoguide 50 APO Refractor
Guiding cameras: ZWO ASI290mini monochrome
Software: Topaz Labs Topaz DeNoise 2.0.0 · N.I.N.A. 1.10 · Ascom EQMOD · PixInsight · Photoshop cc2018 · PHD 2
Filters: IDAS D2 lightpollution suppression 2" filter
Accessory: QHYCCD Polemaster · Startech Industrial Hub 7 Ports · AstroZap Dew Heater · Pegasus Astro pocket powerbox · skywatcher field flattener
Dates:Feb. 13, 2021
Frames: 55x180" (gain: 90.00) -15C bin 1x1
Integration: 2.8 hours
Darks: ~20
Flats: ~30
Flat darks: ~30
Avg. Moon age: 1.68 days
Avg. Moon phase: 3.16%
Bortle Dark-Sky Scale: 6.00
Temperature: -17.00
Astrometry.net job: 4248602
RA center: 11h 20' 8"
DEC center: +13° 17' 16"
Pixel scale: 1.151 arcsec/pixel
Orientation: -23.735 degrees
Field radius: 0.899 degrees
Resolution: 4688x3116
Locations: Home, Gothenburg, Sweden
Data source: Backyard
The night that I collected the subs for this image was very cold for this region of Sweden, -14C.
The dew-heaters on both the telescope and guidscope stopped to work and I noticed it only when the session was ended. The lenses of both scopes were covered with quite much frost that unfortunately made the subs a bit out of focus and the stars got strange rays.
I found out, the day after, that the problem was a glitch in the sensor’s connection on the Pegasus Pocket Powerbox that was not sending any data abou temp and humidity to the Powerbox .
I had also to fight against nasty gradients due to strong light pollution to the est where the city center is located.
Not so happy with the result, but given the conditions and problems I'm glad that something came out anyway from the subs.
Clear skies!
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