NGC 1499 California Nebula (Yuxuan)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 46 Per) · 46 ksi Per · California Nebula · HD24664 · HD24747 · HD25152 · HD25538 · HD275963 · HD275964 · HD279140 · HD279141 · HD279142 · HD279143 · HD279146 · HD279147 · HD279148 · HD279149 · HD279150 · HD279151 · HD279153 · HD279154 · HD279156 · HD279158 · HD279159 · HD279160 · HD279216 · HD279217 · HD279218 · HD279219 · HD279221 · And 63 more.

NGC 1499 California Nebula

California nebula is dominated by red, but I wanted to avoid the look of a featureless red patch. In order to do this, I needed to (i) boost the OIII signal and (ii) sharpen the details to bring out the dust lanes. The OIII signal is incredibly weak, and to avoid noise when boosting OIII, I took twice as many OIII frames, and used H+S/3 as a synthetic L frame. For ease of sharpening, I worked with starless versions of L and SHO frames, generated by StarNet2, to avoid artifacts, only adding the stars back near the end of processing.

Stack of 62x300s S, 50x300s H, and 132x300s O, 20h 20min in total with my 130GTX+ASI6200MM. Preprocessing done via WBPP in Pixinsight. Synthetic Luminance made out of H+S/3 for a balance between SNR and fine details. LRGB combination made with starless frames produced by StarNet2.

Original
Final
C
D

C

Description: Reduced the brightness of a saturated star.

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D

Description: Starless version

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Alachua Astronomy Club
Hubble Palette Group
ASI 6200 MM Pro

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Status	Advanced success
Started	...
Astrometry.net job	6871949
PixInsight job	B14YPZ1EWNR3UPLPR4ZA6CJ3AYVNZ50G
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h00m14s.852
RA (top/left)	03h54m24s.742
RA (top/right)	03h54m37s.860
RA (bottom/right)	04h05m58s.516
RA (bottom/left)	04h05m58s.648

Dec (center)	+36°25′55″.26
Dec (top/left)	+37°09′22″.70
Dec (top/right)	+35°39′26″.17
Dec (bottom/right)	+35°41′24″.55
Dec (bottom/left)	+37°11′24″.72

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NGC 1499 California Nebula

NGC 1499 California Nebula

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NGC 1499 California Nebula

NGC 1499 California Nebula

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