From: "David Ryle"
Subject: Kies Sunrise Lunar Ray
2/11/2003  1-4UT  Julian Day 2,452,681.67
Wichita Falls, TX  33.824,-98.544
seeing 4 of 5, transparency 4 of 5, 45°F, wind 13 MPH NNE, humidity 49%.
Rukl 53
22.5°W, 26°S
9:15 PM CST (3;15UT)
magnification x174 and x260 in a 203mm Newtonian reflector.

The western rim has a broken segment allowing a fairly wide ray of light to fall west where it narrows abruptly short of fading into the terminator. From the rim to the distal end, the ray was three-quarters as long as the crater floor was wide. The ray is running along the -26th latitude just north of Dome Kies Pi which only became visible at 3:28UT. A dark spot , possibly a large mound, is positioned just east of the break in the western rim of Kies. This dark spot gives the impression of a shadow on the rim. By 3:35UT the spot is clearly unassociated with the break. By 3:57UT the ray had widened and spilled westward into a shallow and wide trench running south from Koenig crater to Mercator crater. This ridge is probably what caused the ray to narrow sharply earlier in the formation.

Site Longitude = +98.540
Site Latitude = +33.820


Feature = Kies
Feature Longitude: = -22.500
Feature  Latitude: = -26.000

Reproducing Lighting For: 2003/2/11 at 01:00 U.T.

Desired Solar Altitude =  +0.334(Rising),  Azimuth = +91.507
Average Co-longitude =  22.872

See Dave's description above in observation report