Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)
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Sh2-170 (The Little Rosette) Nebula in Ha, 


            Mike Oates
Sh2-170 (The Little Rosette) Nebula in Ha
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Sh2-170 (The Little Rosette) Nebula in Ha

Technical card

Imaging telescopes or lenses: Takahashi FSQ-106 ED

Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD

Guiding cameras: Starlight-XPress Lodestar Autoguider

Software: Sequence Generator Pro  ·  Photoshop CS6  ·  PIXINSIGHT 1.8

Filters: Ha 3nm

Accessory: Lakeside Astro Motor Focus System  ·  Starlight Xpress SX 'Maxi wheel'  ·  Starlight Instruments FTF3545B-A Focuser

Dates:Sept. 20, 2019

Ha 3nm: 6x1200" bin 1x1
Ha 3nm: 29x1800" bin 1x1

Integration: 16.5 hours

Avg. Moon age: 20.56 days

Avg. Moon phase: 66.57%

Bortle Dark-Sky Scale: 8.00

Mean SQM: 18.41

Basic astrometry details

Astrometry.net job: 2950574

RA center: 0h 3' 38"

DEC center: +64° 45' 10"

Pixel scale: 1.434 arcsec/pixel

Orientation: 0.539 degrees

Field radius: 0.858 degrees

Resolution: 3318x2748

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard


This nebula is just a little north of my previous image of CTB 1 (Abell 85) Supernova Remnant.

This is a Ha image processed to bring out as much faint nebulosity as possible and still produce a nice contrasty, sharp image.

Imaged over 5 nights from 16 - 20th Sept 2019 under Bortle 8 skies with an average SQM-L of 18.41 (averaged nightly readings of 18.3 - 18.55)


Sky plot

Sky plot


Sh2-170 (The Little Rosette) Nebula in Ha, 


            Mike Oates