The California Nebula (NGC 1499/Sh2-220) is an emission nebula located in the constellation Perseus. Its name comes from its resemblance to the outline of the US State of California in long exposure photographs.

This has got to be one of my best photos if not the best one out of all. I love it.

Equipment used:
Mount: Dark Frame hypertuned EQ6
Telescope: TS65Q quadruplet Apo refractor
QHY294M Pro Cmos camera, cooled at - 10°C
QHYCCD QHYCCD CFW3M-US 36mm filterwheel
antlia 36mm 3nm Ha, Sii and Oiii filters
antlia 36mm RGB filters
Qhyccd QHY5L-IIM guide camera
Qhyccd Polemaster

Software used:
Eqmod, SGP - Sequence Generator Pro, PHD2, Stellarium, SharpCap for polar alignment

Date: 06.09 to 11.11.2023

Location: Hemel Hempstead, bortle 5

Acquisition details:
Frames:
Antlia 3nm Narrowband H-alpha 36 mm: 80×300″(6h 40′)
Antlia 3nm Narrowband H-alpha 36 mm: 20×600″(3h 20′)
Antlia 3nm Narrowband Oxygen III 36 mm: 60×300″(5h)
Antlia 3nm Narrowband Sulfur II 36 mm: 65×300″(5h 25′)
Antlia V-Pro Blue 36 mm: 10×60″(10′)
Antlia V-Pro Green 36 mm: 10×60″(10′)
Antlia V-Pro Red 36 mm: 10×60″(10′)

Total integration: 20h 55'

Stacked in AstroPixel Processor and processed in Pixinsight, with the help of Noise Xterminator, Blur Xterminator, Star Xterminator, and Photoshop CC 2024