Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  NGC 4485  ·  NGC 4490  ·  NGC4485  ·  NGC4490  ·  PGC2182903  ·  PGC2183842  ·  PGC2184099  ·  PGC2184271  ·  PGC2185016  ·  PGC2185391  ·  PGC2185640  ·  PGC2186780  ·  PGC2187250
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NGC 4490 with C11, 


            Riedl Rudolf
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NGC 4490 with C11

Technical card

Imaging telescopes or lenses: Celestron C11 XLT

Imaging cameras: Nikon D750 (unmodified)

Mounts: Sky-Watcher EQ-8 pro

Focal reducers: Starizona FF Reducer 0,71x

Software: Pixinsight 1.8

Filters: Idas UV/IR cut

Accessory: MGEN II Autoguider with 9x50mm finderscope

Dates:Feb. 14, 2021

Frames: 64x302" ISO1600

Integration: 5.4 hours

Darks: ~25

Flats: ~25

Bias: ~25

Avg. Moon age: 2.63 days

Avg. Moon phase: 7.61%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.30

Temperature: -5.00

Astrometry.net job: 4248379

RA center: 12h 30' 46"

DEC center: +41° 39' 16"

Pixel scale: 1.514 arcsec/pixel

Orientation: 25.050 degrees

Field radius: 0.351 degrees

Resolution: 1401x904

Locations: Home, St. Peter/O., Steiermark, Austria

Data source: Backyard


NGC 4490 and NGC 4485 form the ARP Galaxy group 269.
NGC 4490 has a size of 6,4 x 3,2 arcmin and is in a distance of 27 Mio Lj. The real diameter is 50.000 Lj. There is a disturbed star stream which has a size of 24.000 Lj and goes to the other galaxy
NGC 4485 which is heavily distrubed.
The size of this galaxy is 2,4 x 1,8 arcmin.
There are plenty of small and smallest background galaxies in the field, much more than stars. Every small red patch is a very distant galaxy!