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Name / Constellation

NGC 1961

 Other: IC 2133; Arp 184; UGC 3334; PGC 17625

Cam
Coordinates AR: 05h 42m 04.7sec - Dec: +69° 22' 42"
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
  • 36 x 900 sec - 9 hours
  • 9 x 600 sec - 1 hour 30 min
  • 10 x 600 sec - 1 hour 45 min
  • 9 x 600 sec - 1 hour 30 min
  • UNBINNED
  • BINNING 2X2
  • BINNING 2X2
  • BINNING 2X2
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - 11/13 jan 2018
Seeing About 1.8 - 2 " - 0.71 arcosec/pixel image scale unbinned
Note  
Acquisition MaxIm DL - CCD Autopilot 5
Processing Adobe Photoshop CS5 -
Comment

Spiral Galaxy about 200 Mly away. Given the apparent dimension of 4.6' x 3' it means NGC 1961 is 220000 ly across. Appparent mag 10.9. It appears distorced although no companion has ben detected nor double nuclei that could show a recent merger. Two long arms are visible from the north side of the galaxy. Discovered by W. Herschel on december 3 1788, >NGC 1961is the central member of the small group fo nine galaxies called NGC 1961 Group. It hosted three supernovae in the past: SN 1998eb, SN 2001is and SN 2013cc.