Contains:  NGC 6416, M 6, Butterfly cluster, NGC 6405, NGC 6404, NGC 6383
Getting plate-solving status, please wait...

SH2-12 featuring M6

Technical card

Resolution: 3296x4112

Dates: June 3, 2017

Astrodon Tru-Balance E-Series Blue 36mm Blue Filter: 16x300"
Astrodon Tru-Balance E-Series Green 50mm Green Filter: 16x300"
Astrodon Ha 1.25 3nm: 12x1200"
Astrodon Red Tru-Balance E-Series Gen 2 Red filter: 16x300"

Integration: 8.0 hours

Avg. Moon age: 9.28 days

Avg. Moon phase: 69.63%

Bortle Dark-Sky Scale: 3.00 job: 1605069

RA center: 263.334 degrees

DEC center: -32.364 degrees

Pixel scale: 3.289 arcsec/pixel

Orientation: -51.471 degrees

Field radius: 2.407 degrees

Data source: Unknown


Not too many images of this object out there... actually I couldn't find any!

So here's a two panel HaRGB mosaic of Sharpless Sh2-12 & 13 (aka Gum 67 & 68, RCW 132) featuring M6 created with data all gathered one clear and very cold night in Kilmore, country Victoria, Australia. Moonset was at 1am so it was Ha before 1am and RGB afterwards.

It's an overlooked feint-ish target, but it's rich in Ha and has some pretty interesting Dark tower-like extrusions in Sh2-12 (the big one) and a Masterchef style Ha plate wipe in SH2-13 (the smaller one).

Very happy to get the entire data set in a single clear night, despite mist lurking and fog threatening!

Hard to keep the motivation going to get up at 1:30am for the Meridian flip and again at 4am to finish the second panel of the mosaic with the temperature at a chilly 1degreeC. Brrrrr...
Ah - the joys of manual Ap with a mac - No auto plate-solving or Meridian flips for this guy!

2 Hrs Ha x 20min subs, 40mins ea RG&B x 5 min subs ea. per panel.

I'm slowly getting better at processing HaRGB, but as always C&C are welcome :)



License: None (All rights reserved)



Balanced out background colour to neutral


Portrait orientation :)

Sky plot

Sky plot


SH2-12 featuring M6,