M45 Pleiades The Seven Sisters in LRGB


Pleiades! One of the best sights in the nightsky (even with the naked eye!). Pleiades according to the Greek mythology where the seven daughters of Atlas turned into a group of stars. It's one of the best objects for visual and astrophotography but its quite hard to process :)

Astronomy object details: 

The cluster contains hundreds of stars, of which only a handful are commonly visible to the unaided eye. The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years) away. The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing.

Technical details: 

SBIG 8300M
HEQ5 Pro
Guiding camera: QHY CCD QHY5 mono
Filters used: Baader LRGB
Starlight Xpress Starlight Xpress FW 5*2"

Resolution: 3112x2197
Baader UV-IR Cut Filter L: 10x300" -5C bin 1x1
Baader Blue 2": 22x80" -5C bin 2x2
Baader Green 2": 22x80" -5C bin 2x2
Baader Red 2": 22x80" -5C bin 2x2
Integration: 2.3 hours
Darks: ~50
Flats: ~20
Bias: ~300
Avg. Moon age: 27.47 days
Avg. Moon phase: 4.72%
Bortle Dark-Sky Scale: 1.00
Temperature: 6.25
RA center: 56.989 degrees
DEC center: 24.176 degrees
Pixel scale: 2.135 arcsec/pixel
Orientation: -7.715 degrees
Field radius: 1.130 degrees
Locations: Parnonas, Greece
Dates: Aug. 11, 2015

Projection origin.. [1556.121377 1098.720977]pix -> [RA:+03 47 57.29 Dec:+24 10 31.56]
Resolution ........ 2.135 arcsec/pix
Rotation .......... 172.277 deg
Focal ............. 521.62 mm
Pixel size ........ 5.40 um
Field of view ..... 1d 50' 45.1" x 1d 18' 11.3"
Image center ...... RA: 03 47 57.272  Dec: +24 10 31.06
Image bounds:
   top-left ....... RA: 03 44 21.051  Dec: +23 24 11.43
   top-right ...... RA: 03 52 19.766  Dec: +23 38 58.43
   bottom-left .... RA: 03 43 32.623  Dec: +24 41 35.39
   bottom-right ... RA: 03 51 36.117  Dec: +24 56 31.41

Captured with  Main Sequence Software SequenceGeneratorPro
Processed in PixInsight

Annotated astrophotograph: 
Space object type: