Date:
Imaged at:
Equipement:
Optics:
Mount:
Camera:
Exposure:
Luminance:
Red:
Green:
Blue:
H-alpha:
22-11-2011
Grand-Praz
RCO 16" f8.4
Paramount
STL-11000M
80 min
70 min
70 min
70 min
120 min
Messier:
NGC:
Name:
Constellation:
Distance:
Visual magnitude:
Description:
1491
Per
HII ionized region, spectral type B0