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 17P Holmes, November 12th, 2007
Comet 17P Holmes, November 12th, 2007, 0:30 - 1:30 UT. Clear skies with the limiting magnitude around 5.0, seeing 5 - 6 (fair - good).
TMB Optical 175mm f/8 refractor on a homemade Dobsonian-style mount. Magnification 58x-100x, field of view approximately 1.10 degrees.
The inner coma had somewhat of a tear-drop shape to it. The outer coma appeared translucent and had a number of stars visible in it. As during my last observation of the comet there appeared to be a faint parabolic hood or envelope visible around outer coma which was fainter than the tail. A faint tail was visible, with the brightest portion located at the 7:00 o'clock position, with the one located at the 10:00 o'clock position not as pronounced. I used different deep-sky filters including a Baader UHC-S filter to helped bring out the fainter detail in the comet.