Collecting Photons

Simeis 147 - Sh2-204 - LBN 818 Taurus

North is right 1600x1138

Objects: The supernova remnant Simeis 147. At its north a weak emission area (LBN 818)

Constellation: Taurus

Coordinates of field center: 5h 40m +28° 0'

Notes: this is an object of extremes: extremely faint, extremely beautiful, extremely large.

Telescope and camera: Megrez 80 super apo with the Televue 0.8x flattener (80-384 mm f 4.8); SBIG STL 11000.

Exposure: Hα 50x16'; R, B 10x10'; G 10x8'. 18 hrs total.

Date: 4 pretty full nights on 2, 21, 22, 23-01-10.

Software used: acquisition, CCDsoft. Calibration; registration and stacking: CCDstack, Iris; processing: PixInsight, Photoshop CS.