Celestial hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  NGC 6823
Sh 2-86 / NGC 6820 and NGC 6823, Phillip
Sh 2-86 / NGC 6820 and NGC 6823
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Sh 2-86 / NGC 6820 and NGC 6823

Sh 2-86 / NGC 6820 and NGC 6823, Phillip
Sh 2-86 / NGC 6820 and NGC 6823
Powered byPixInsight

Sh 2-86 / NGC 6820 and NGC 6823

Equipment

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Acquisition details

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Description

Independence Day Weekend Project (7/3, 7/4)

NGC 6820 / Sh 2-86 and NGC 6823 (star cluster)

Located in the constellation Vulpecula (very close to the dumbbell nebula in our sky) and 6,000 light-years from Earth, Sh 2-86 is a birthing place for stars. This target is composed of an open star cluster and a reflection nebula. This image was created by capturing three different wave lengths of light (Ha, Sii, and Oiii) and then assigning each wavelength to a specific color channel (RGB). In this case, I used what is called the Hubble Pallet or SHO, meaning Sii in Red, Ha in Green, and Oiii in Blue.

Data

Light frames:

43x120s Sii

90x120s Ha

28x180s Oiii

5h50 Total integration time

Calibration frames (for each filter)

20 Darks

20 Flats

20 Dark Flats

40 Bias

Equipment

Sky-Watcher Esprit 100 ED

Sky-Watcher EQ6-R

ZWO ASI1600mm Pro

ZWO EFW 8-Position

Astrodon 31mm NB filters (5nm Ha, 5nm Sii, 3nm Oiii)

ZWO ASI290mm mini guide camera

ZWO OAG

PrimaLuceLab Eagle3S Control unit

PrimaLuceLab Sesto Senso 2 Robotic Focuser

PrimaLuceLab ECCO Temperature Control

Dew-Not Dew Heater Strap

QHY PoleMaster

Imaging Software

NINA Imaging Suite

PHD2 Guiding

PrimaLuceLab Accessory Software

QHY PoleMaster Software

EQMOD

RemoteDesktop

Workflow

Preprocessing in PixInsight

Blink

SubframeSelector to measure FWHM, discarding out of focus frames/frames with planes and satellites

Stacked in DeepSkyStacker

Back in PixInsight (for each channel)

AutomaticBackgroundExtraxtion

MorphologicalTranformation - Luminance

HistogramTransformation

StarAlign

PixelMath for RGB Combination - Sii, Ha, Oiii (SHO)

DynamicCrop

AutomaticBackgroundExtraxtion

PhotometricColorCalibration

SCNR - Green

ACDNR

RangeSelector for mask

LocalHistogramEqualization

Curves - Saturation

Comments

Sky plot

Sky plot

Histogram

Sh 2-86 / NGC 6820 and NGC 6823, Phillip