Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023
Getting plate-solving status, please wait...
The Iris Nebula - NGC 7023/Caldwell 4, 



    
        

            Serge Caballero
The Iris Nebula - NGC 7023/Caldwell 4
Powered byPixInsight

The Iris Nebula - NGC 7023/Caldwell 4

Getting plate-solving status, please wait...
The Iris Nebula - NGC 7023/Caldwell 4, 



    
        

            Serge Caballero
The Iris Nebula - NGC 7023/Caldwell 4
Powered byPixInsight

The Iris Nebula - NGC 7023/Caldwell 4

Technical card

Imaging telescopes or lenses: Astro-Tech AT8IN

Imaging cameras: QHY CCD QHY8

Mounts: CGEM

Guiding telescopes or lenses: Orion 50 mm mini guider

Guiding cameras: Orion SSAG

Focal reducers: Baader Planetarium MPCC Mark III

Software: Star Tools  ·  Stark Labs Nebulosity 3.1.X  ·  Photoshop CS6  ·  ADGSoftware PHD2 (OpenPHD)

Filters: Lumicon UHC 2"


Dates:Sept. 8, 2013June 4, 2014

Frames:
30x600" (5h) (gain: 11.00) -10C bin 1x1
37x360" (3h 42') (gain: 11.00) -8C bin 1x1

Integration: 8h 42'

Darks: 10

Flats: 20

Flat darks: 20

Bias: 90

Avg. Moon age: 4.57 days

Avg. Moon phase: 23.43%

Bortle Dark-Sky Scale: 5.00

Temperature: 21.00


Basic astrometry details

Astrometry.net job: 296007

RA center: 21h00m56s.4

DEC center: +68°0628

Orientation: -179.668 degrees

Field radius: 1.003 degrees


Resolution: 3009x2082

Locations: Backyard, Gainesville, FL, United States

Description

The Iris Nebula (NGC 7023/Caldwell 4) is bright (magnitude 6. reflection nebula in the constellation Cepheus, spanning 6 light years across and about 1,300 light years from the Solar System. The Iris is surrounded by large areas and lanes of dark dust that are difficult to image from suburban skies, but some traces of this dust is visible here.

B Version re-processed to lift up dust from the background and to try to give the dust some of the characteristic brown I've seen in other images.

Comments

Revisions

  • Final
    The Iris Nebula - NGC 7023/Caldwell 4, 



    
        

            Serge Caballero
    Original
  • The Iris Nebula - NGC 7023/Caldwell 4, 



    
        

            Serge Caballero
    B

Sky plot

Sky plot

Histogram

The Iris Nebula - NGC 7023/Caldwell 4, 



    
        

            Serge Caballero