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 Halley, April 3, 1986
Original drawing made using white pencil on black paper:
Same drawing on a white background:
Comet Halley, April 3, 1986, 7:45 - 8:15 UT, seeing 6 (0 worst, 10 best), transparency 5.5. Field of view: 1.43 degrees.
Astro-Physics 4" f/6 refractor on Super Polaris mount. Magnification 35x - 81x.
Coma seemed larger this morning, very diffuse, with the pseudo-nucleus appearing slightly brighter. Noted faint dust tail, but comet no longer appeared to have a gas tail that was visible when I observed Comet Halley on March 22, 1986. I found out later that the gas tail had disconnected, which made the comet much less impressive during its closest approach to earth in late April.