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Contains:  Butterfly cluster, M 6, NGC 6405
Getting plate-solving status, please wait...
M6 - The Butterfly Cluster in Scorpius, 


            Michael Feigenbaum
M6 - The Butterfly Cluster in Scorpius
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M6 - The Butterfly Cluster in Scorpius

Imaging telescopes or lenses: Vixen R200SS

Imaging cameras: ZWO ASI1600MM

Mounts: Orion HDX110 EQ-G

Guiding telescopes or lenses: ZWO 30F4 Guidescope

Guiding cameras: ZWO ASI 120 MC

Software: PixInsight  ·  Stark Labs Nebulocity 4  ·  Stark Labs PHD 2.6  ·  DSS

Filters: Astronomik Blue 1.25"  ·  Astronomik Green 1.25" CCD Filter

Dates:June 22, 2019June 23, 2019

Astronomik Blue 1.25": 92x60" (gain: 139.00) -5C
Astronomik Green 1.25" CCD Filter: 100x60" (gain: 139.00) -5C
Astronomik Red 1.25": 101x60" (gain: 139.00) -5C

Integration: 4.9 hours

Darks: ~60

Flats: ~50

Bias: ~500

Avg. Moon age: 20.00 days

Avg. Moon phase: 71.97%

Bortle Dark-Sky Scale: 4.33 job: 2758993

RA center: 17h 40' 20"

DEC center: -32° 15' 32"

Pixel scale: 0.975 arcsec/pixel

Orientation: 220.115 degrees

Field radius: 0.642 degrees

Resolution: 3918x2673

Locations: Papago Butte, near Maricopa, AZ, United States

Data source: Backyard


Messier 6 or the Buttefly Cluster... I find these open clusters to be very beautiful and excellent for working to improve processing skills. I think one can quite clearly see the butterfly pattern.

This cluster lies about 1,600 ly away in Scorpius. It is quite young at about 100mm years and is made up of mostly hot spectral class B stars. The orange spectral class K star though, being the brightest.

The foregoing information was obtained from

This cluster does appear quite low in the sky at my latitude (32-59N) but I still wanted to image it.

Anyway, any comments and/ or criticism always welcome and clear skies to all!




Michael Feigenbaum
License: None (All rights reserved)

Sky plot

Sky plot


M6 - The Butterfly Cluster in Scorpius, 


            Michael Feigenbaum