NGC 2403

Celestial hemisphere: Northern · Constellation: Camelopardalis (Cam) · Contains: 51 Cam · HD59720 · HD59897 · HD60292 · HD60613 · NGC 2403 · NGC 2404 · The star 51 Cam

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NGC 2403

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NGC 2403

Imaged the galaxy NGC 2403 on the nights of April 19 & 20, 2023. This is my first capture of spring 2023's 'galaxy season.' Looking forward to capturing a few more that are new to me this year...

Per Wikipedia: "NGC 2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group, and is approximately 8 million light-years distant. It bears a similarity to M33, being about 50,000 light years in diameter and containing numerous star-forming H II regions." NGC 2403 has an apparent magnitude (v) of 8.3 and an apparent size of 21.9 × 12.3 arcsec.

Imaged with a William Optics GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, UVIRcut filter, and ZWO ASI 533MC Pro. Total integration time of 3 hours: 90 subs at Gain = 100 with an exposure time of 120 sec.

Pre-processed using Pixinsight's weighted batch pre-processing script (WBPP) to perform calibration, debayering, registration, local normalization, and integration. Background removed using GradXpert. Post-processing in Pixinsight: spectrophotometric color calibration, blur x terminator, noise x terminator, masked stretch, curves transformation, HDR transformation using EasyHDR script, local histogram normalization, and color saturation adjustment.

Original version: NGC 2403 OSC RGB image

Rev B: NGC 2403 OSC RGB image, starless

Rev C: NGC 2403 OSC RGB image, inverted

Final
Original
B
C

B

Description: Starless version

Uploaded: ...

C

Description: Inverted version

Uploaded: ...

Suburban Astrophotography
Starless Images
William Optics GT Series
ASI533MC Pro
The refractors!
Cloudy Nights

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	7624557
PixInsight job	9SEA8KN5JIEIVLTSWLU5SL30DC64L0SC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h36m21s.50
RA (top/left)	07h47m25s.28
RA (top/right)	07h36m57s.77
RA (bottom/right)	07h25m11s.28
RA (bottom/left)	07h35m46s.38

Dec (center)	+65°33′47″.7
Dec (top/left)	+65°27′18″.9
Dec (top/right)	+66°42′52″.4
Dec (bottom/right)	+65°37′08″.5
Dec (bottom/left)	+64°24′40″.5

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NGC 2403

NGC 2403

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Image Index:

Contribution Index (beta):

NGC 2403

NGC 2403

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

In these public groups

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