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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 18Tau, The star Electra (17Tau), The star Celaeno (16Tau)
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M45 Pleiades, 





    
        

            turfpit
M45 Pleiades

M45 Pleiades

Technical card

Resolution: 712x1065

Dates:Oct. 9, 2018

Frames: 30x60" (gain: 400.00)

Integration: 0.5 hours

Darks: ~30

Flats: ~100

Bias: ~100

Avg. Moon age: 0.38 days

Avg. Moon phase: 0.16%

Temperature: 11.00

Astrometry.net job: 2312353

RA center: 56.781 degrees

DEC center: 24.148 degrees

Pixel scale: 7.665 arcsec/pixel

Orientation: 11.099 degrees

Field radius: 1.364 degrees

Data source: Backyard

Description

60 lights, 30 darks, 100 flats, 100 bias.
Altair Astro 66ED refractor, Altair 183C V2 camera, AVX mount, Planostar 0.8x flattener/reducer.
Capture software SharpCap v3.2 beta.
Focus with Bahtinov Mask, unguided.
Bias frame checked with FITS Liberator to ensure balanced histogram, used to decide black level setting.
Stack produced using Siril plus colour calibration, SCNR & colour saturation. Stack finalised with GIMP 2.10. About 1 hour for calibration and processing.

Looking at the histogram, I will reprocess the stack as some work needed on colour balancing.

2018-10-12, new set of lights captured on 10th Oct using 120s exposure (original was 60s). getting the blue nebulosity now. Still a way to go

http://www.clarkvision.com/articles/astrophotography.m45-pleiades.true.color/

Dave

Comments

Author

turfpit
turfpit
License: None (All rights reserved)
3600
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Revisions

  • M45 Pleiades, 





    
        

            turfpit
    Original
  • M45 Pleiades, 





    
        

            turfpit
    B
  • M45 Pleiades, 





    
        

            turfpit
    C
  • M45 Pleiades, 





    
        

            turfpit
    D
  • Final
    M45 Pleiades, 





    
        

            turfpit
    E

B

Reprocessed stack for improved colour balance and modified orientation.

C

Adjust red balance.

D

Recaptured with 30x120s (was 60s exposures) and re-processed.

E

Exposure increased to 180s (from 120s). 20x180s stacked and processed. Only 11 of the 20 frames could be used due to cloud forming during the capture. The thin cloud caused a red imbalance which had to be processed out.

Sky plot

Sky plot

Histogram

M45 Pleiades, 





    
        

            turfpit