NGC 2903 (Sergey Trudolyubov)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: NGC 2903 · NGC 2905

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NGC 2903

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NGC 2903

Here we have a spectacular barred spiral galaxy, NGC 2903 in the constellation of Leo. NGC 2903 is a giant spiral galaxy belonging to the Virgo Super Cluster which includes the Milky way and Andromeda galaxies and located ~30 million light years away. NGC 2903 appears to be somewhat similar in size to our Milky Way with an estimated disk diameter of ~100,000 light years. The inner disk, the bar and outer spiral arms are dotted with numerous star formation regions seen as blue and bright pinkish knots. The galaxy disk is inclined by an angle of ~60 degrees to the line of sight from the Earth. The faint fuzzy blob seen at 10-11 o'clock is a dwarf elliptical galaxy UGC 5086 which is believed to be a satellite of NGC 2903.

This image uses a combination of LRGB and H-alpha data collected with my mobile setup, the 250mm Lacerta PhotoNewton and ZWO ASI294MM Pro camera in February 2021 and February-March 2024:

L: 21x300s (Gain 0, bin 1x1)(Feb. 2021)
L: 22x300s (Gain 0, bin 1x1) and 64x90s (Gain 108, bin 1x1)(Feb. 2024)
R: 41x180s (Gain 108, bin 1x1)(Feb. 2024)
G: 32x180s (Gain 108, bin 1x1)(Feb. 2024)
B: 42x180s (Gain 108, bin 1x1)(Feb. 2024)
Ha: 21x600s (Gain 200, bin 1x1)(Feb.-Mar. 2024)

Total exposure: 14.4 hours

C

Title: Close-up view

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D

Title: Close-up view, North is up

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E

Title: A slightly wider view

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F

Description: Slightly wider view, darker background

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Description: Darker background

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ZWO ASI294MM Pro Images
Fast Newtonians
CMOS Imagers

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Status	Advanced success
Started	...
Astrometry.net job	9528807
PixInsight job	KMYLODJ2JSB09EP2LXT82PCL8TVCQ0AN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h32m09s.930
RA (top/left)	09h33m31s.522
RA (top/right)	09h32m39s.881
RA (bottom/right)	09h30m48s.183
RA (bottom/left)	09h31m40s.124

Dec (center)	+21°29′58″.39
Dec (top/left)	+21°22′59″.99
Dec (top/right)	+21°48′58″.40
Dec (bottom/right)	+21°36′54″.17
Dec (bottom/left)	+21°10′58″.57

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NGC 2903

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