h300. NGC 5474 -- Peculiar Galaxy in UMa
27 June 2023, 03:39 UT, Stuart Florida USA.
Celestron CPC1100 DX at f/10. QHY294 Pro mono camera, bin 2, exposure 10s, MONO8, gain 3512, stack of 9 subs, no calibration frames, IR cut filter, no guiding, sensor 0°C.
Appearance: very small and dim galaxy, circular, diffuse, cloudlike edge, brighter round core is offset from center
Size (before crop): 23x15arcmin
Scale: 0.7"/px
Issues: Moon up, 58% illuminated.
from Stellarium:
Azimuth: 323°
Altitude: 51°
Magnitude: 10.8
Apparent size: 2.5 arcmin
Clouds: partly cloudy
Transparency: 3
Seeing: VG
from Wikipedia:
NGC 5474 is a peculiar dwarf galaxy in the constellation Ursa Major. It is one of several companion galaxies of the Pinwheel Galaxy (M101), a grand-design spiral galaxy. Among the Pinwheel Galaxy's companions, this galaxy is the closest to the Pinwheel Galaxy itself. The gravitational interaction between NGC 5474 and the Pinwheel Galaxy has strongly distorted the former. As a result, the disk is offset relative to the nucleus.
The star formation in this galaxy (as traced by hydrogen spectral line emission) is also offset from the nucleus. NGC 5474 shows some signs of a spiral structure. As a result, this galaxy is often classified as a dwarf spiral galaxy, a relatively rare group of dwarf galaxies.
h300. NGC 5474 -- Peculiar Galaxy in UMa
27 June 2023, 03:39 UT, Stuart Florida USA.
Celestron CPC1100 DX at f/10. QHY294 Pro mono camera, bin 2, exposure 10s, MONO8, gain 3512, stack of 9 subs, no calibration frames, IR cut filter, no guiding, sensor 0°C.
Appearance: very small and dim galaxy, circular, diffuse, cloudlike edge, brighter round core is offset from center
Size (before crop): 23x15arcmin
Scale: 0.7"/px
Issues: Moon up, 58% illuminated.
from Stellarium:
Azimuth: 323°
Altitude: 51°
Magnitude: 10.8
Apparent size: 2.5 arcmin
Clouds: partly cloudy
Transparency: 3
Seeing: VG
from Wikipedia:
NGC 5474 is a peculiar dwarf galaxy in the constellation Ursa Major. It is one of several companion galaxies of the Pinwheel Galaxy (M101), a grand-design spiral galaxy. Among the Pinwheel Galaxy's companions, this galaxy is the closest to the Pinwheel Galaxy itself. The gravitational interaction between NGC 5474 and the Pinwheel Galaxy has strongly distorted the former. As a result, the disk is offset relative to the nucleus.
The star formation in this galaxy (as traced by hydrogen spectral line emission) is also offset from the nucleus. NGC 5474 shows some signs of a spiral structure. As a result, this galaxy is often classified as a dwarf spiral galaxy, a relatively rare group of dwarf galaxies.