Celestial hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  NGC 2237  ·  NGC 2238  ·  NGC 2239  ·  NGC 2246  ·  NGC 2252  ·  Rosette A  ·  Rosette B  ·  Rosette Nebula  ·  The star 12 Mon
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Rosette Nebula in SHO-RGB, Dylan Chapman
Rosette Nebula in SHO-RGB
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Rosette Nebula in SHO-RGB

Getting plate-solving status, please wait...
Rosette Nebula in SHO-RGB, Dylan Chapman
Rosette Nebula in SHO-RGB
Powered byPixInsight

Rosette Nebula in SHO-RGB

Equipment

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Acquisition details

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Description

First image getting posted with the new telescope! Been sitting on the data since last year, was never quite happy with the processing. Gave it another round this year and was pretty pleased with the result!

Located approximately 5,000 light years away and spanning 130 light years across, the Rosette Nebula is a large cloud of gas and dust containing around 10,000 Suns worth of material. It spans 1.3 degrees, or a bit over two times the size of the full Moon, in our night sky. At the center of this nebula lies the open cluster NGC 2244 containing thousands of stars that have recently, i.e. in the last five million years, formed from its material. Among these stars are two incredibly massive O-type stars whose intense winds and radiation have created the central cavity and given the nebula its overall appearance. These two stars are both over 400,000 times as bright and over 50 times more massive than the Sun. Apparently the Rosette Nebula is the official Oklahoma state astronomical object as of 2019!

The nebulosity is shown in SHO false color, while the stars are shown in RGB color.

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Image details:

Dates: 1/8/2023, 1/9/2023, 1/10/2023, 1/13/2023, 1/14/2023, 1/16/2023
Frames (SHO gain: 50, RGB gain: 0, offset: 15, camera temp: -15C, bin: 1x1):
- S-II: 33x10m (5h 30m)
- H-a: 35x10m (5h 50m)
- O-III: 34x10m (5h 40m)
- R: 44x90s (1h 6m)
- G: 42x90s (1h 3m)
- B: 42x90s (1h 3m)
Integration: 20h 12m
Darks: 50 per exposure duration
Flats: 25 per calibration
Flats darks: 25 per calibration

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Equipment details:

Imaging telescope: AT115EDT
Imaging camera: ASI1600MM Pro
Imaging filters: Chroma 3nm SII, Astrodon 5nm H-a, Chroma 3nm OIII
Mount: Atlas EQ-G
Guiding camera: ASI290MM Mini
Software: N.I.N.A., GS Server, PHD2, PixInsight
Accessories: ZWO Off Axis Guider, ZWO Electronic Automatic Focuser, ZWO Electronic Filter Wheel, HeaterDream3 Dew Heater

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Rosette Nebula in SHO-RGB, Dylan Chapman