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Contains:  Crescent Nebula, NGC 6888
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NGC 6888, 


            James Schrader
NGC 6888
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NGC 6888

Technical card

Imaging telescopes or lenses: Orion 8" f/3.9 Newtonian Astrograph

Mounts: Orion Atlas EQ-G

Guiding cameras: QHY5L-II

Software: Sequence Generator Pro  ·  Pisinsight 1.8

Filters: Orion Extra Narrowband Filter OIII 1.25"  ·  Orion Extra Narrowband Filter Ha 1.25"

Accessory: Orion Thin Off Axis Guider (TOAG)  ·  Baader MPCC Coma Corrector

Dates:Sept. 24, 2016

Frames: 82x900"

Integration: 20.5 hours

Avg. Moon age: 23.26 days

Avg. Moon phase: 38.29%

Basic astrometry details job: 3642455

RA center: 20h 12' 8"

DEC center: +38° 21' 14"

Pixel scale: 0.585 arcsec/pixel

Orientation: 334.469 degrees

Field radius: 0.381 degrees

Resolution: 3770x2785

Locations: Home (Front Yard), Jefferson City, MO, United States

Data source: Backyard


Had an entire week of clear weather last week and was able to capture a decent amount of subs on NGC 6888. This was a fairly difficult image to capture. I had to gather a lot of OIII subs, and the star field around the nebula was difficult to keep under control in post-processing. This is a bi-color narrowband composition, with red mapped to hydrogen alpha and blue/green channels mapped to oxygen iii. Details are below.

Hydrogen Alpha: 40 x 900s, Bin 1x1
Oxygen III: 42 x 900s, Bin 1x1
Bias: 350
Sensor Temp: -18C

Equipment: Atik 428EX Mono, Orion 8" F/3.9 Newtonian Reflector
Processed in Pixinsight



James Schrader
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6888, 


            James Schrader