Observation by John Hughes: NGC7789 Carolines Rose

Uploaded by

Mr John William Hughes

Observer

John Hughes

Observed

2020 Dec 27 - 20:46

Uploaded

2020 Dec 28 - 17:46

Objects

The Caroline's Rose (NGC7789)

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Constellation

Cassiopeia

Field centre

RA: 23^h57^m
Dec: +56°43'
Position angle: -179°21'

Field size

1°38' × 1°14'

Equipment

William Optics Z103 Refractor
ZWO ASI1600mm Pro Cooled camera
SkyWatcher EQ6-R Pro mount
Chroma 1.25” LRGB filters

Exposure

Gain 139, Offset 30

Location

North Essex, UK

Target name

NGC7789, Caroline’s Rose

Title

NGC7789 Carolines Rose

About this image

With only limited time again for imaging before the clouds and rain rolled in, I decided to keep to my recent trend of photographing open clusters and chose Caroline’s Rose.

NGC7789 had just crossed the meridian when I started imaging and was nearly opposite a waxing gibbous moon (94% illumination).

I commenced imaging with the Chroma Blue filter working my way through Luminance, Green then finally Red as it moved lower in the night sky. RGB were binned 2x2 with 20 frames for each being captured. Luminance was binned at 1x1 with 10 frames taken. Exposure times for RGB and Luminance were 120 and 60 seconds respectively.

Calibrated using flats and dark flats captured the following morning and darks from my dark library (50 frames each).

Files associated with this observation

NGC7789 Carolines Rose WB.jpg (1.5 MB)

Like this image

David Basey, Manolo_Rodriguez, Mike Harlow, Grant Privett, Graham Winstanley

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