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California Nebula NGC1499 in Persius

Technical card

Imaging telescope or lens: APM LZOS 130/780 f/6 LW CNC II 130mm APO

Imaging camera: FLI ML16200

Mount: Takahashi EM-200 Temma2

Guiding telescope or lens: Orion Deluxe 50mm MiniGuider

Guiding camera: Orion SSAG

Focal reducer: Riccardi Reducer/Flattener 0.75x

Software: PixInsight 1.8TheSkyXPS CS6

Filter: Astrodon Gen2E LRGB

Resolution: 1367x1700

Dates: Dec. 2, 2016

Astrodon 5nm Halpha: 6x1200" -30C bin 1x1
Astrodon Gen2E Lum: 13x600" -30C bin 1x1
Astrodon Gen2E RGB: 10x600" -30C bin 1x1

Integration: 5.8 hours

Avg. Moon age: 2.24 days

Avg. Moon phase: 5.58%

Mean SQM: 21.52 job: 1422641

RA center: 60.303 degrees

DEC center: 36.344 degrees

Pixel scale: 5.546 arcsec/pixel

Orientation: 89.021 degrees

Field radius: 1.680 degrees


A 5.9 hr HaLRGB image of this classic emission nebula around 100 light-years long. The Ha line dominates from ionized hydrogen recombining with free electrons. It is believed that the bright, hot, bluish Xi Persei, just right of the nebula (North is to the left) is providing the energetic starlight that ionizes much of the nebular gas. Image taken from 100 miles south of the San Francisco Bay area seen in the image (but in Earth coordinates) at D.A.R.C. Observatory, Mercey Hot Springs, CA (12/2/16).




Sky plot

Sky plot


California Nebula NGC1499 in Persius, jeffweiss9