Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic (Jim Lindelien)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 11 CMa · 12 CMa · 5 ksi02 CMa · 6 nu.01 CMa · 7 nu.02 CMa · 8 nu.03 CMa · 9 alf CMa · IC 2171 · IC 452 · LBN 1049 · M 41 · NGC 2271 · NGC 2283 · NGC 2287 · NGC 2296 · PK228-11.1 · Part of the constellation Canis Major (CMa) · Sh2-304 · Sirius · The star 11CMa · The star Sirius (αCMa) · The star ν1CMa · The star ν2CMa · The star ν3CMa · The star ξ2CMa

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Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

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Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

This is a 2-panel wide field mosaic capturing brilliant star Sirius along with open cluster Messier 41, and Ha emissions from a portion of Sh2-304 -- a nebula underrepresented in Astrobin's collection. Zooming into the full res image file, one can see some structure in NGC 2283.

I've posted it horizontally for easier viewing online but the intent is to hang a print on the wall vertically.

For a sense of scale, about eight full moons will fit between Sirius and M41.

Sensor temperatures: Ha -5C; RGB 0C
Sensor gains: Ha 200; RGB 100
For each panel, 18 RGB 120 sec subs; 8 Ha 900 sec subs.

Imaged on two nights 2/28-3/1 (RGB, both panels) and 3/1-3/2 (Ha, both panels). Drizzle stacked.

Sky brightness ranged SQM 21.64 - 21.79. To highlight Sirius, I taped on a cross of monofilament fishing line in front of the refractor's objective to create the diffraction spikes optically vs. synthetically in post production. I attached these filaments to the dew shield, and rotated it so the lines were parallel to the FOV framing.

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Objects of the South - negative declination only
Narrowband imaging
Deep Sky Mosaics
Sharpless2 Objects
Unique or Unusal Deep Sky Targets
ASI 6200 MM Pro
CMOS Imagers
WO Star 71

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Status	Advanced success
Started	...
Astrometry.net job	5602432
PixInsight job	LSMGAJR3217NLBR2NVAPSOL0VBNI2BXR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h43m32s.48
RA (top/left)	06h47m45s.59
RA (top/right)	06h54m52s.62
RA (bottom/right)	06h39m31s.76
RA (bottom/left)	06h31m26s.36

Dec (center)	-19°03′17″.6
Dec (top/left)	-24°41′50″.6
Dec (top/right)	-14°01′22″.9
Dec (bottom/right)	-13°25′26″.9
Dec (bottom/left)	-24°02′50″.1

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Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

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Image Index:

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Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

Sirius M41 Sh2-304 Wide Field 2-Panel Mosaic

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