Darin E. Fields' Astrophotography Pages

M57: The Ring Planetary Nebula in Lyra

Right Ascension 18 : 53.6 (h:m)
Declination +33 : 02 (deg:m)
Distance 4.1 (kly)
Visual Brightness 8.8 (mag)
Apparent Dimension 1.4x1.0 (arc min)
More information on M57

Exposure: LRGB exposure. L=5 min. 5x60 sec.), R=5 min. (5x60 sec.), G=5 min. (5x60 sec.), B=5 min. (5x60 sec.).
Telescope: 8" f/4 Newtonian.
Camera: ST-237 SBIG cooled @ -28c
Guiding: SBIG ST-4 on ST-80 @ f/10
Mount: Losmandy G-11
Acquisition and Processing: Maxim/DL and Photoshop 6.0
Date: 5/23/02

Exposure: LRGB exposure. L=7 min. 30 seconds (3x 2:30)1x1, R=360 seconds (3x120) 2x2, G=10 min. (5x120 sec.) 2x2, B=10 min. (5x120 sec.) 2x2.
Telescope: Celestron C11 @ f/6.5
Camera: ST-237 SBIG cooled @-16c
Guiding: SBIG ST-4 on Lumicon GEG @ f/10
Mount: Losmandy G-11
Processing: Maxim/DL: 20 iterations of Max-Ent Deconvolution on Luminance layer.
Date: 10/03/01

Exposure: LRGB Track and Accumulate exposure. L=150 seconds (5x30)1x1, R=150 seconds (5x30) 2x2, G=150 seconds (5x30) 2x2, B=150 seconds (5x30) 2x2.
Telescope: Celestron C11 @ f/10
Camera: ST-237 SBIG cooled @-20c
Processing: CCDOPS, Photoshop
Date: 7/02/01