California Nebula: The clouds gave me a couple of hour break the other night and allowed me to take a few more exposures of the California Nebula in Perseus (Also known as NGC 1499).

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California Nebula

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Nov 12, 2021 02:03:40 #

Ballard Loc: Grass Valley, California

The clouds gave me a couple of hour break the other night and allowed me to take a few more exposures of the California Nebula in Perseus (Also known as NGC 1499). This is a large emission nebula that is powered by
the 4th magnitude blue star known as Menkib (this is the blue star above the nebula in the in the images below). The star and Nebula are ~ 1000 light years away. The UV light from Menkib excites the hydrogen in the nebula causing it to glow. This image was taken with a 500mm Canon lens connected to a cooled monochrome CMOS camera and filter wheel. As with many deep sky images a number of much more distance galaxies photo bomb the image (See the second annotated image below).

For those interested the exposures used to capture this image include
95 minutes (19, 5 minute exposures) using the Luminance filter
70 minutes (14, 5 minute exposures) using the Red filter
75 minutes (15, 5 minute exposures) using the Green filter
50 minutes (19, 5 minute exposures) using the Blue filter ( the clouds came back and cut shot the blue exposures)
150 minutes (15, 10 minute exposures) using the Hydrogren Alpha (5 nm Ha narrow band) filter See the the third image below for the image using just the Ha filter.

The Ha was added to the red channel to create the LRGB image below.

The second image has those galaxies that I could find in my sky map circled (Note: There are many other small galaxies in the image but they where not in my maps). Note use double download to see the distance galaxies.

(- indicates where the data wasn't available) (distance derived from Radial velocity and Hubble constant of
72 km/sec per mega parsec.)

PGC 14276 Type Sc Spiral Galaxy, mag 15.22, (Radial Velocity 4330km/sec) distance 196 million light years
PGC 14068 Type SBcd Spiral Galaxy, mag 18.22, (Radial Velocity 6016km/sec) distance 272 million light years
PGC 14008 Type S0 Spiral Galaxy, mag 14.86, (Radial Velocity 5945km/sec) distance 269 million light years
PGC 13948 Type - Galaxy, mag 15.97, (Radial Velocity 5953km/sec) distance 269 million light years
PGC 13969 Type SBm Spiral Galaxy, mag 16.87, (Radial Velocity 4004km/sec) distance 181 million light years
PGC 13981 Type S0 Spiral Galaxy, mag 15.62, (Radial Velocity 5385km/sec) distance 244 million light years
PGC 14045 Type Sbc Spiral Galaxy, mag 15.60, (Radial Velocity 5766km/sec) distance 261 million light years
IC 2005 Type - Spiral Galaxy, mag 14.08, (Radial Velocity -) distance -
PGC 97028 Type Sbc Spiral Galaxy, mag 15.60, (Radial Velocity -) distance -
PGC 14455 Type - Galaxy, mag 15.10, (Radial Velocity -) distance -
IC 2027 Type E Elliptical Galaxy, mag 15.08, (Radial Velocity6423km/sec) distance 290 million light years
PGC 14572 Type - Galaxy, mag 15.92, (Radial Velocity -) distance -
PGC 14579 Type Sbc Spiral Galaxy, mag 15.12, (Radial Velocity 5969km/sec) distance 270 million light years
PGC 14584 Type - Galaxy, mag 16.13, (Radial Velocity 6817km/sec) distance 309 million light years

All questions comments and suggestions are welcome.

California nebula
California nebula...