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NGC2903 - LRGB
In 2 groups

Traveller
Linden, Linden (Bayern), DE
Kursberg, Alfeld (Bayern), DE
N

Leo
9h
32m
10s
·
+21°
30′
22″
0.44°
0.49″/px
358.86°N
Integration
28×300″ | 2h 20′ | |||
12×300″ | 1h | |||
12×300″ | 1h | |||
12×300″ | 1h | |||
Totals | 5h 20′ |
28×300″=2h 20′ | |
12×300″=1h | |
12×300″=1h | |
12×300″=1h | |
Totals | 5h 20′ |
Imaging equipment
Telescope | |
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Camera | |
Mount | |
Filters | |
Accessory | |
Software |
Guiding equipment
Guiding optics | |
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Guiding camera |
Objects
Description
Some impresssions from capturing nights:
04/10/24:

05/10/24:
Because of Aurora Lights, i had to sort out some RGB data

Object description (Wikipedia.org):
NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis.It was discovered by German-born astronomer William Herschel, who cataloged it on November 16, 1784.He mistook it as a double nebula, as did subsequent observers, and it wasn't until the nineteenth century that the Third Earl of Rosse resolved into a spiral form. J. L. E. Dreyer assigned it the identifiers 2903 and 2905 in his New General Catalogue; NGC 2905 now designates a luminous knot in the northeastern spiral arm.
This field galaxy is located about 30 million light-years away from the Milky Way, and is a member of the Virgo Supercluster. The morphological classification of this galaxy is SBbc, indicating a barred spiral (SB) with moderate to tightly-wound spiral arms (bc). De Vaucouleurs and associates assigned it the class SAB(rs)bc, suggesting a weaker bar structure (SAB) with a partial ring (rs).
The bar structure appears stronger in the near infrared band. The galaxy as a whole is inclined by an angle of 60° to the line of sight from the Earth. 72% of the stellar mass is located in the outer disk of the galaxy, and 20% is found in the bar. The bulge adds 5% of the stellar mass, and its star population is generally older. However, the central ~650 pc radius volume of the core is a strong starburst region. The star formation rate here is 0.7 M☉ y−1 and it is being fed by gas inflow along the bar. There is no evidence of an active nucleus.
04/10/24:
05/10/24:
Because of Aurora Lights, i had to sort out some RGB data

Object description (Wikipedia.org):
NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis.It was discovered by German-born astronomer William Herschel, who cataloged it on November 16, 1784.He mistook it as a double nebula, as did subsequent observers, and it wasn't until the nineteenth century that the Third Earl of Rosse resolved into a spiral form. J. L. E. Dreyer assigned it the identifiers 2903 and 2905 in his New General Catalogue; NGC 2905 now designates a luminous knot in the northeastern spiral arm.
This field galaxy is located about 30 million light-years away from the Milky Way, and is a member of the Virgo Supercluster. The morphological classification of this galaxy is SBbc, indicating a barred spiral (SB) with moderate to tightly-wound spiral arms (bc). De Vaucouleurs and associates assigned it the class SAB(rs)bc, suggesting a weaker bar structure (SAB) with a partial ring (rs).
The bar structure appears stronger in the near infrared band. The galaxy as a whole is inclined by an angle of 60° to the line of sight from the Earth. 72% of the stellar mass is located in the outer disk of the galaxy, and 20% is found in the bar. The bulge adds 5% of the stellar mass, and its star population is generally older. However, the central ~650 pc radius volume of the core is a strong starburst region. The star formation rate here is 0.7 M☉ y−1 and it is being fed by gas inflow along the bar. There is no evidence of an active nucleus.
Revision: B
Published Jun 1, 2024, 11:40:35 AM
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