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Contains:  Merope nebula, NGC 1435, Maia nebula, NGC 1432, The star Pleione (28Tau), The star Atlas (27Tau), The star ηTau, The star Merope (23Tau), The star Sterope I (21Tau), The star Taygeta (19Tau), The star Electra (17Tau), The star Celaeno (16Tau)
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M45 - The Pleiades, 


            Wes Chilton
M45 - The Pleiades

M45 - The Pleiades

Technical card

Resolution: 3270x2477

Dates:Nov. 8, 2015

Astrodon Blue Tru-Balance E-Series Gen: 12x600" -20C bin 1x1
Astrodon Green Tru-Balance E-Series Gen: 20x600" -20C bin 1x1
Astrodon Luminance Tru-Balance E-Series Gen: 40x600" -20C bin 1x1
Astrodon Red Tru-Balance E-Series Gen: 20x600" -20C bin 1x1

Integration: 15.3 hours

Darks: ~50

Flats: ~20

Bias: ~512

Avg. Moon age: 26.61 days

Avg. Moon phase: 9.38%

Bortle Dark-Sky Scale: 8.00

Mean FWHM: 3.17

Temperature: 14.60 job: 910705

RA center: 56.729 degrees

DEC center: 24.115 degrees

Pixel scale: 1.761 arcsec/pixel

Orientation: 179.892 degrees

Field radius: 1.003 degrees

Locations: Home Observatory, La Crescenta, California, United States

Data source: Backyard


This is a work in progress image from, frankly, rather poor data. The weather here has been windy, cloudy and unstable. But I couldn't stand being inside any more so I decided to get out and shoot something. ;)

FWHM ranged from 1.9 to nearly 4.2 making stacking this data pretty rough. Also being in a white zone meant really bad gradients and other unwanted signal noise.

I did a bit of DBE, which helped, but I'm still learning how to get the most out of that.
Thanks to Tolga for pointing me at Rogelio's HLVG Script, which helped a lot with green noise. :)

I'll be getting better data on this and trying again as soon as the weather improves.

UPDATE: I uploaded a different version that uses LRGBCombination process technique. Its more neutral and gives better star colors, but exposes the seeing flaws a lot more.

Revision D is just a new reprocess of my 600-second RGB data to try and increase contrast and get better star colors. Its still not perfect and I need better data from dark skies....



Wes Chilton
License: None (All rights reserved)


  • M45 - The Pleiades, 


            Wes Chilton
  • M45 - The Pleiades, 


            Wes Chilton
  • M45 - The Pleiades, 


            Wes Chilton
  • Final
    M45 - The Pleiades, 


            Wes Chilton

Sky plot

Sky plot


M45 - The Pleiades, 


            Wes Chilton

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