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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.