Celestial hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  M 65  ·  M 66  ·  NGC 3593  ·  NGC 3623  ·  NGC 3627  ·  NGC 3628  ·  The star 73Leo
The Leo Triplet and friends, Andrew Klinger
The Leo Triplet and friends
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The Leo Triplet and friends

The Leo Triplet and friends, Andrew Klinger
The Leo Triplet and friends
Powered byPixInsight

The Leo Triplet and friends

Equipment

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Acquisition details

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Description

Equipment:

OTA: William Optics GT81 w/0.8x reducer (382mm fl at f/4.7)

Mount: Orion Sirius EQ-G (HEQ-5)

Guidescope: Orion 50mm guidescope

Guiding camera: Orion StarShoot Autoguider

Imaging camera: ZWO ASI1600MM-Cool

Software:

SGP

PHD2

CdC

PixInsight

Acquisition:

Location: Atoka, Oklahoma (Bortle 3)

Dates: 1/16/2018, 2/17/2018, 3/11/2018, 3/12/2018, 3/14/2018

Gain: 76 Offset: 15

Camera temp: -20C

L: 262x180"

R: 53x180"

G: 61x180"

B: 77x180"

Total integration time: 22hr 39min

64x darks per calibration

30x flats per calibration

200x bias (master bias in library)

Preprocessing:

Batch PreProcessing script to generate calibrated images

StarAlignment to register all frames to a reference L

LocalNormalization per channel

ImageIntegration

DrizzleIntegration

DynamicCrop each master

DBE on each master

RGB processing:

BackgroundNeutralization

ColorCalibration using the galaxies as the white balance

SCNR green 50%

ArcsinhStretch

HistogramTransformation x2

SCNR green 100%

CurvesTransformation for saturation

L processing:

Deconvolution

HistogramTransformation

MaskedStretch

LocalHistogramEqualization

MultiscaleLinearTransform for sharpening

CurvesTransformation for contrast

Combined L and RGB with LRGBCombination tool

Resampled to 50% for web posting

Comments

Sky plot

Sky plot

Histogram

The Leo Triplet and friends, Andrew Klinger