Observer: Tony Donnangelo
Date/time of observation: 2004/03/30  01:56  U.T. 
Site location: Hummelstown RD 3, PA, USA (40.26° N., 76.75° W.) 
Site elevation: 479 feet (146 meters)
Site classification: Suburban
Instrument: Takahashi FS-102 f/8
Magnification: 158x 

I started observing at 00:05 U.T. The evening began with very clear and steady seeing. By 1:30 U.T., a hazy, thin layer of clouds started moving in and became very breezy. At 02:20, the wind picked up and seeing began deteriorating. By 02:50 U.T., the wind became very strong, shaking the scope feverishly, and the temperature dropped considerably. By 04:15 U.T., I had to end my observing session.

At 01:56 U.T., I observed a short, narrow ray in Fra Mauro HA. It extended almost the length of the crater floor. The eastern wall of the crater seemed to be rather low. There’s a mountainous area east of the crater. A ridge there runs north and south and appears to be higher than the crater wall. A break in this ridge allowed a shaft of light to be cast on the crater’s floor.

The sun rose quickly in this crater. Within thirty minutes, the shadows shortened significantly, leaving a large portion of the floor illuminated. By 02:50 U.T. (in less than an hour), the floor was completely illuminated, except for a slight shadow on part of the eastern floor area.