Choosing A Telescope
Telescope Aperture Considerations
Introduction to Planetary Sketching
Refractor Dobsonian Style Mounts
The Bonds: Pioneers of American Astronomy
Saturn's Encke Minima and Encke Division
Nature and Travel Photography
Recommended Astronomy Books
Comet C2006 M4 SWAN (2006), October 22nd, 2006
Comet C2006 M4 SWAN (2006), October 22nd, 2006, 00:15 - 00:30 UT., seeing 5 (fair), transparency 5.0.
TMB Optical 175mm f/8 refractor on a homemade Dobsonian-style mount. Magnification 34x-70x, field of view approximately 1.12 degrees. North is at the upper right in this sketch, south to the lower left, east to the lower right and west to the upper left.
The comet showed a stellar pseudo-nucleus, inner coma and larger outer coma, all of which had a green-blue color to them. The gas tail extended straight back from the coma while the dust tail appeared fan-shaped on both sides of the coma.