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
September 11th, 1988, 6:15 - 6:50 UT, seeing 7, then 6, then 5 (0 worst, 10 best), transparency 2, then 4. Central Meridian 109.88 - 117.19 degrees. Diameter of Mars: 23.71".
Astro-Physics 7" f/9 refractor on an Astro-Physics 706 German equatorial mount. Magnification 202x - 234x. 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 dark mare surface features have an olive green to brownish green color to them. Solis Lacus seems larger then the last time I observed it on August 6th, even accounting for the fact that Mars is now closer. Mare Erythraeum and Mare Sirenum are prominent.