Palus Epidemarium Double Ray (as reported by Akkana Peck)
8/20/99 at 10:30pm PDT, at the SJAA public star party at Houge Park, we were entranced by a lovely pair of rays in Palus Epidemiarum. I made this sketch with my VX102 refractor (then flipped it later to match with the map view), but in a nearby 10" reflector, interesting detail was visible, barely illuminated by the rays, on the floor of Palus Epidemiarum.
Akkana's date and time reported was 8/20/99 @ 10:30PDT. This converts to 8/21/99 at 5:30 hours UT date and time. The initial predictions show the desired solar altitude was -3.198 rising. The initial predictions show:
Feature = PALUS EPIDEMIARUM Feature Longitude: = -28.200 Feature Latitude: = -32.000 Reproducing Lighting For: 1999/8/21 at 05:30 U.T. Desired Solar Altitude = -3.198(Rising), Azimuth = +91.524 Average Co-longitude = 24.428 In the Time column, D=Daylight, T=Twilight ---- Moon's ---- -- Earth's -- Topocentric Topocentric -------- Sun's -------- UT Date Time Alt° Semi-Diam'' Long° Lat° Colong° Lat° Azim° 1999/08/21 05:30 +13.640 897.06 -1.440 -4.626 024.680 +0.404 +91.524
Epidemiarum Pallus, -380 -480 to -460 -580; A small dark plain to the east of Cichus, and transversed by the Ramsden cleft system, with many hills and craterlets on its surface. Mercator and Campanus limit it on the north, Capuanus and Elger on the south, and Cichus on the west. - Wilkins and Moore, The Moon, Faber and Faber, 1955