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
July 26th, 1988, 9:30 - 10:05 UT, seeing 8 (0 worst, 10 best), transparency 5. Central Meridian 138.89 - 147.42 degrees. Diameter of Mars: 16.03".
Astro-Physics 7" f/9 refractor on an Astro-Physics 706 German equatorial mount. Magnification 202x - 304x. Filters used include Yellow (W12), Orange (W23), light Red (W23A), Red (W25) Magenta (W30), Green (W58), Blue (W80A), and Violet (W47).
South is at the top, north at the bottom, preceding on the left, and following on the right.
The South Polar Cap is prominent, as is Hellas. Mare Sirenum has a distinct green color to it, almost an olive green. Electris is lighter in color than the surrounding area, and is best brought out by a W58 green filter.