Rosette Nebula, NGC2237 (matthew.maclean)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: 12 Mon · LBN 941 · LBN 943 · LBN 948 · LBN 949 · LBN 951 · LDN 1625 · Monoceros · NGC 2237 · NGC 2238 · NGC 2239 · NGC 2244 · NGC 2246 · NGC 2252 · PGC 136569 · PGC 138944 · Rosette A · Rosette B · Rosette Nebula · Sh2-275 · The star 12 Mon

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Rosette Nebula, NGC2237

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Rosette Nebula, NGC2237

The winter and early spring did not offer much opportunity for astrophotography - essentially continuous clouds for four months with only a couple occasional breaks sometimes lasting a mere hour or two. In early March, I managed to get a three-hour session; sky conditions were not too good and a half-moon was up in the sky, so I had to pick a fairly easy target. The Rosette was one of my first serious astrophotography projects with an old DSLR, so it was fun to re-visit it again after a couple years.

The main benefit to this project was that this was my first (and, to date, only) test of the new Antlia ALP-T 5nm dual-band filter. This filter (at least my copy) has no detectable star halos! I've never really been happy with the L-Ext, so this Antlia will probably become my primary narrowband filter from now on. The narrow bandpass is quite evident- these are 12 minute frames just to get a reasonable signal. The background is a little rough with only fifteen frames in the stack, but the contrast is nice. I have included a sample raw frame (Rev C) that has nothing but stretching applied to it for anybody that would like to see it.

Final
Original
B
C

B

Title: SHO coloring

Uploaded: ...

C

Title: single raw frame (stretched)

Uploaded: ...

William Optics GT Series
Duo-band, Tri-band, and Quad-band Imaging
Light Polluted skies
Northeast Imagers

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Status	Advanced success
Started	...
Astrometry.net job	5727230
PixInsight job	MET6KSIP6UYKPF1LM30F1DVBHPB6PAQS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h32m17s.44
RA (top/left)	06h37m16s.42
RA (top/right)	06h36m26s.42
RA (bottom/right)	06h27m16s.80
RA (bottom/left)	06h28m09s.49

Dec (center)	+04°50′01″.9
Dec (top/left)	+03°11′57″.8
Dec (top/right)	+06°37′02″.4
Dec (bottom/right)	+06°28′09″.4
Dec (bottom/left)	+03°03′22″.6

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Rosette Nebula, NGC2237

Rosette Nebula, NGC2237

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C

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Rosette Nebula, NGC2237

Rosette Nebula, NGC2237

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B

C

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