NGC 2403 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Camelopardalis (Cam) · Contains: NGC 2403 · NGC 2404

NGC 2403

This object is a beautiful spiral galaxy located only 12 million light-years away in the constellation of Camelopardalis. The galaxy is almost the size of our Milky Way, at a diameter of just under 100,000 light-years across. The galaxy is seen about 30 degrees from face-on. Numerous bright stars from our own Milky Way shine in the foreground.

This galaxy is very active, with over 100 ΗII regions visible in the spiral arms. These hydrogen regions are seen in the image as reddish glows. The largest of these regions is over 1000 light years in diameter and larger than any HII region in our galaxy. These Ha regions, along with its almost face-on view, diffuse core, and lack of distinct dust lanes in the arms, are the reasons why this galaxy is often compared to M33. M33 is smaller but significantly closer than this galaxy.

Also of note for this galaxy is that it is the location of the closest – and brightest – supernova stellar explosion discovered in many years. Amazingly, the remnant of the supernova which occurred in 2004 can still be faintly seen as a tiny dot of bluish-white light as indicated on the mouseover image.

In addition, on the mouseover, 3 globular clusters are identified.

Final
Original
C

C

Description: Mouseover shows 3 globular clusters (yellow) and 2004 supernova remnant (blue)

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The refractors!
Cloudy Nights
ZWO ASI1600MM/QHY163M

Brightest Galaxy Catalog (Complete)
Caldwell Catalog (Complete*)
Flocculent Galaxies
Globular Clusters (Extragalactic)
Many Galaxy Arms

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This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	2666148
PixInsight job	0TKSDBSOQ2JOQZDVBIVCIUPY42Z0DQO5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	07h36m47s.693
RA (top/left)	07h40m22s.472
RA (top/right)	07h35m19s.814
RA (bottom/right)	07h33m12s.783
RA (bottom/left)	07h38m13s.309

Dec (center)	+65°36′33″.78
Dec (top/left)	+65°35′57″.34
Dec (top/right)	+65°56′50″.25
Dec (bottom/right)	+65°36′51″.27
Dec (bottom/left)	+65°16′14″.17

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NGC 2403

NGC 2403

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NGC 2403

NGC 2403

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