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Name / Constellation

NGC 3184

 Other: UGC 5557

Uma
Coordinates AR: 10h 18m 16,9s, +41° 25′ 27″
Optics Officina Stellare 10" f8 Richtey-Cretien
Camera-Mount PLAYERONE POSEIDON M-PRO - ZWO ASI 1600M (ONAG)- 10Micron GM2000 QCI Mount
Filters Antlia V-Pro LRGB
Exposure
  • Luminance
  • Red
  • Green
  • Blue
  • 77 x 300 sec - 6 hours 25min
  • 34 x 300 sec - 2 hours 50min
  • 34 x 300 sec - 2 hours 50min
  • 20 x 300 sec - 1 hours 40min
  • Binning 3
  • Binning 3
  • Binning 3
  • Binning 3
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - Jan 2024
Seeing 2.6" @ 1.17 arcosec/pixel binning 3
Note Drizzle 2X in postprocessing (Pixinsight))
Acquisition N.I.N.A.
Processing Adobe Photoshop CC -
Comment

 

NGC 3184 is a spiral galaxy located approximately 25 million light-years away from us, in the constellation of Ursa Major.

It is one of the brightest galaxies in the constellation, easily identifiable less than a degree west of the star μ Ursae Majoris, of third magnitude. Its spiral arms, visible face-on, are well recognizable even in small instruments; inside them are clearly visible two H II regions, catalogued separately with the acronyms NGC 3180 and NGC 3181.

NGC 3184 is particular for the great abundance of heavy elements and for the supernovae exploded inside it: 1921B of magnitude 13.5, 1921C of 11.0, 1937F of 13.5, 1999gi of 14.5, and the PSN J10181930+4125392 of 15.9, in 2010 an object was observed, 2010dn, which turned out to be an LBV.