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From the Rosette to the Cone, 


            Gary Lopez
From the Rosette to the Cone
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From the Rosette to the Cone

Technical card

Dates:Jan. 2, 2019Jan. 3, 2019

Astrodon Ha 3nm-31mm: 60x180" (gain: 130.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 40x180" (gain: 139.00) -15C bin 1x1
Astrodon SII 3nm-31mm: 42x180" (gain: 139.00) -15C bin 1x1

Integration: 7.1 hours

Darks: ~30

Bias: ~50

Avg. Moon age: 26.69 days

Avg. Moon phase: 9.06%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details job: 2632307

RA center: 6h 37' 5"

DEC center: +8° 4' 26"

Pixel scale: 9.170 arcsec/pixel

Orientation: 105.691 degrees

Field radius: 5.957 degrees

Resolution: 3731x2821

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard


I enjoy wide angle views as they reveal the spacial relationships of the common objects we all photograph, and how one object is visually connected to another by veils of wispy dust and gas. In this scene are the familiar Rosette Nebula (Caldwell 49, 1600 PC) and the Cone Nebula (NGC2264, 830 PC). In addition there are two supernova remnants, SNR 205.5+0.5 (Monoceros Loop, 1600 PC), and SNR 206.9+2.3 (6900 PC). This stretch of Monocero is a continuum of wonderful objects linked one to another across the sky.

I collected these data several months ago, but had much difficulty finding a processing approach where the star field did not overwhelm the objects of interest. This is my latest effort.



Gary Lopez
License: None (All rights reserved)

Sky plot

Sky plot


From the Rosette to the Cone, 


            Gary Lopez