Hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  IC 2763  ·  IC2694  ·  IC2708  ·  IC2745  ·  IC2782  ·  Leo Triplet  ·  M 65  ·  M 66  ·  M65  ·  M66  ·  NGC 3623  ·  NGC 3627  ·  NGC 3628  ·  NGC3628
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The Leo Triplet  / M66 Group, 


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The Leo Triplet / M66 Group

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!


Sky plot

Sky plot


The Leo Triplet  / M66 Group,