Nebula
NGC 2244
(inside Rosette Nebula)

Object :	NGC 2244
Coordinates/Direction :	RA: 06h31m, DEC: +04^o56'
Object size :	24'
Object magnitude :	4.8
More to know :	Wikipedia: https://en.wikipedia.org/ wiki/ NGC_7822 https://en.wikipedia.org/ wiki/ Rosette_Nebula

NGC 7023 Iris Nebula 2024-03-06, processed 2024

(Click on image and get a full resolution image in a new window)

Date :	2021-12-24
Time (UT) :	21:22 - 22:15

Mount :

SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)

Guide :

QHY5 camera with 400 mm f/6.3 lens

Lens/telescope :	Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow :	-
Field (FOV) :	6.8x4.5^o (full frame) before crop

camera :	Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature:	About 6^o C above surrounding temperature
Film/CCD :	Raw, Cr2
Filter :	none

Control system :

Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC

Exp. time :	43x30 seconds = 22 minutes, iso1600, dithering mode
Image process tool :	Siril, Gimp, Irfanview
Processing :	synthetic bias, flat, photometric color calibration
Weather :	clear, temperature -9^o C

Site :

Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20^o-90^o, 165^o-185^o, La: 20^o-55^o

Comment :

This open cluster sit inside the Rosette Nebula. The nebulosity from the nebula is impossible to se from light polluted environment but the open cluster is visible. The size of the nebula is 80' and the open cluster 24', the Moon is 30' as a comparison. This night was cold, -9^o C, the coldest I have tested the equipment at is -15^o C.

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Nebula NGC 2244 (inside Rosette Nebula)

NGC 7023 Iris Nebula 2024-03-06, processed 2024

Nebula
NGC 2244
(inside Rosette Nebula)