M51 + supernova 2011dh + NGC5195Type Galaxy Date 2011-06-19 22:35:00 Constellation Canes Venatici Distance 30Mly Magnitude 8.0 Picture diagonal width 28 ' Site Gieres, 38, France (MPC:B83) Instrument Newton Diameter 200 mm Resulting focale 1000 mm Mount Atlas EQ G Exposures R:3+G:4+B:6x5mn Total exposure 65mn Autoguide Yes Sensor Temp. -15 °C Camera SBIG ST7-XME Sensor CCD Sensor size 4.6x6.9 mm2 Sensor pixels 765x510 Binning no Resize 1.00 Resulting sampling 1.85 "/pix Filters R,G,B (Astronomik IIc) Record Type FIT Processing Astrometrica (-dark,/flat,add) + Iris (LRGB,white bal,black,gradient,ddp,levels, crop) Sky transparency mag<4 Remarks LRGB mode (L=R+G+B,coefs: L=1,R=1,G=1.2,B=2)