Click on the image for FULL RES
Name / Constellation

NGC 4157

 Other: UGC 7183; PGC 38795; CGCG 269-38; MCG +09-20-106; IRAS 12085+5045

UMa
Coordinates AR: 12h 11m 04.4sec - Dec: +50° 29' 05"
Optics Richtey-Chretien Officina Stellare 10"@F8 Carbon Truss
Camera-Mount SBIG ST10XME/CFW10/ONAG/ST8300 guider - 10Micron GM2000 QCI Mount
Filters Astrodon LRGB TruBalance (Gen 2)
Exposure
  • Luminance
  • Red
  • Green
  • Blue
  • 11 x 900 sec - 2 hours 45 min
  • 8 x 600 sec - 80 min
  • 8 x 600 sec - 80 min
  • 8 x 600 sec - 80 min
  • UNBINNED
  • BINNING 2X2
  • BINNING 2X2
  • BINNING 2X2
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - mar / apr 2017
Seeing 1.8" @ 0.71 arcosec/pixel unbinned
Note  
Acquisition MaxIm DL - CCD Autopilot 5
Processing Adobe Photoshop CS5 -
Comment

Barred spiral galaxy located about 35.6 Mly away. It is receding from us at approximately 774 km/sec. Three supernovae explosions occurred in this galaxy: SN 1937A, SN 1955A and SN 2003J, which was a type II supernova. Apparent mag 11.3, size 6.7' x 1.2'.