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California Nebula
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Nov 12, 2021 12:16:44   #
Ballard Loc: Grass Valley, California
 
ELNikkor wrote:
Great shot! How cold does the cooled camera get? Maybe show a photo of your set-up.


Hi ELNikkor
Thanks for viewing the shot of the California Nebula and for the comment. The camera can be set to ~40 degrees C below ambient temperature. I had it set to -5 C for gathering these images.

The images below contain photos for the the configuration I was using the 500mm canon lens.
https://static.uglyhedgehog.com/upload/2021/9/12/467992-imgl4884.jpg
https://static.uglyhedgehog.com/upload/2021/9/12/468363-imgl4885.jpg
https://static.uglyhedgehog.com/upload/2021/9/12/469088-imgl4886.jpg

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Nov 12, 2021 12:19:04   #
Ballard Loc: Grass Valley, California
 
jdub82 wrote:
Wow! Amazing images!


Hi jdub82
Thanks for viewing the image of the California Nebula, for the comment and the Thumbs up.

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Nov 12, 2021 12:20:03   #
Ballard Loc: Grass Valley, California
 
SkyKing wrote:
…amazing stuff…excellently produced…!


Hi SkyKing
Thanks for checking out the California Nebula photo and for the comment.

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Nov 12, 2021 12:21:16   #
Ballard Loc: Grass Valley, California
 
frankraney wrote:
Very good!!


Hi frankraney
Thanks for viewing the photo of the California Nebula, for the comment and the Thumbs up.

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Nov 12, 2021 12:22:05   #
Ballard Loc: Grass Valley, California
 
photophile wrote:
Beautiful.


Hi photophile
Thanks for checking out the photo of the California Nebula and for the comment.

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Nov 12, 2021 12:23:03   #
Ballard Loc: Grass Valley, California
 
Longshadow wrote:
Neat!


Hi Longshadow
Thanks for viewing the image of the California Nebula and for the comment.

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Nov 13, 2021 07:50:15   #
alberio Loc: Casa Grande AZ
 
Ballard wrote:
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.
The clouds gave me a couple of hour break the othe... (show quote)


I like the HA version best.

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Nov 13, 2021 08:06:56   #
sb Loc: Florida's East Coast
 
Very nice!

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Nov 13, 2021 08:27:42   #
rdemarco52 Loc: Wantagh, NY
 
Very nice. Alot of work for you. Thanks for posting these.

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Nov 13, 2021 08:36:09   #
Bultaco Loc: Aiken, SC
 
Beautiful photography, I've always been amazed of the beauty in our sky.

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Nov 13, 2021 08:59:20   #
charlienow Loc: Hershey, PA
 
Excellent images and descriptions.

Chuck

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Nov 13, 2021 10:58:33   #
Ballard Loc: Grass Valley, California
 
alberio wrote:
I like the HA version best.


Hi alberio
Thanks for checking out the images of the California nebula and for the comment. It was interesting that the HA version had more detail in the nebula than the other filters. The addition of the other colors tended to reduce the definition in the nebula. I expect that adding in O3 and S2 filters with the Ha might make for an interesting image.
That might have to wait due to all the clouds coming by every night (I was sunny yesterday but the clouds moved in by 9:00 PM.).

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Nov 13, 2021 11:02:16   #
Ballard Loc: Grass Valley, California
 
sb wrote:
Very nice!


Hi sb
Thanks for viewing the California Nebula and for the comment.

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Nov 13, 2021 11:03:59   #
Ballard Loc: Grass Valley, California
 
rdemarco52 wrote:
Very nice. Alot of work for you. Thanks for posting these.


Hi rdemarco52
Thanks for checking out the photos of the California Nebula and for the comment. It does take some time, but a lot of fun experimenting and learning how to process these images.

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Nov 13, 2021 11:04:28   #
angler Loc: StHelens England
 
Excellent.

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