Hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  24 phi Aur  ·  IC 417  ·  IC417  ·  NGC 1907  ·  NGC 1931  ·  NGC1907  ·  NGC1931  ·  Sh2-234  ·  Sh2-237  ·  The star φAur
Getting plate-solving status, please wait...
Sh2 234 Spider H-Alpha, 



    
        

            jerryyyyy
Powered byPixInsight

Sh2 234 Spider H-Alpha

Getting plate-solving status, please wait...
Sh2 234 Spider H-Alpha, 



    
        

            jerryyyyy
Powered byPixInsight

Sh2 234 Spider H-Alpha

Imaging telescopes or lenses: Takahashi Epsilon 180ED

Imaging cameras: SBIG STT 8300M

Mounts: Astro-Physics Mach1AP GTO CP4

Guiding telescopes or lenses: Takahashi Epsilon 180ED

Guiding cameras: SBIG STT 8300M

Software: Software Bisque TheSky X Professional  ·  CCDWare FocusMax V.4  ·  PixInsight  ·  Maxim DL  ·  EQMOD  ·  Excalibration

Filters: Baader H-alpha 7nm  ·  Baader B 1.25'' Filter  ·  Baader G 1.25'' Filter  ·  Baader R 1.25'' Filter

Accessory: MoonLite Telescope Accessories High Resolution Stepper Motor with MiniV2 Controller


Dates:March 2, 2017

Frames:
Baader B 1.25'' Filter: 16x140" (37' 20") bin 1x1
Baader G 1.25'' Filter: 16x100" (26' 40") bin 1x1
Baader H-alpha 7nm : 24x1800" (12h) bin 1x1
Baader R 1.25'' Filter: 16x100" (26' 40") bin 1x1

Integration: 13h 30' 40"

Avg. Moon age: 4.15 days

Avg. Moon phase: 18.27%


Astrometry.net job: 1478792

RA center: 5h 28' 13"

DEC center: +34° 26' 22"

Pixel scale: 1.108 arcsec/pixel

Orientation: -90.356 degrees

Field radius: 1.228 degrees


Resolution: 6402x4756

Locations: Stanford Faculty Observatory (Bortle 6 SQM 18.6), Stanford, California, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

I may put the RGB back up but you just cannot see the detail in the color version. Reminds me of why Ansel Adam used the zone system in Black and White. For those of you not familiar with Ansel Adam, he was a famous American landscape photographer who worked a lot in Yosemite National park. His zone system divided the subject into 11 zones from black to white in even gradations of grey. A "good" rendition had equal amount of all 11 zones. Ansel of course used 5" glass plates and was really before color yet his theory still is very important in landscape photography. In Yosemite Galen Rowell was the first great color photographer who was famous for popularizing push processing of Fuji Velvia film.

https://en.wikipedia.org/wiki/Zone_System

Ansel did all this before Photoshop.... in the dark room.

Information on Galen:

https://en.wikipedia.org/wiki/Galen_Rowell

Comments