Observer: Tony Donnangelo
Date/time of observation: 2004/03/30  01:30  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 
Lunar ray coordinates:  15.0° W., 37.5° S. & 15.0° W., 36.5° S.

This double ray, which was calculated from an estimated time of the original observation, was predicted to occur at 01:00 U.T. This was very close to my observation beginning at 01:30 U.T.

I started observing at 00:05 U.T. The evening began with a very clear and steady sky. By 1:30 U.T., a hazy, thin layer of clouds started moving in, and it 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.

Renart’s floor was completely shadowed. Its rim and exterior area was illuminated, with its southwest exterior edge abutting the terminator. North and east of Renart, Crater Gauricus’ floor was two-thirds illuminated, and its interior western wall was fully illuminated. Visible in Gauricus was a horizontal line of craters superimposed along the length of its western wall, a very interesting sight. North and west of Renart, crater Wurzelbauer’s western wall abutted the terminator, with its floor totally shadowed.

At 01:30 U.T., I observed a small spot of light near the northwest corner of the floor. Further south, about the middle latitude of the crater, I observed an interior illuminated peak. Shortly after, I observed the illuminated peaks of three raised areas lying east and west. I initially thought this was going to be an illuminated ridge, not a ray.

By 02:00 U.T., the northern spot of light lengthened slightly and was very thin. The southern ray area remained the same. Fifteen minutes later, the northern ray extended approximately one-forth the length of the floor and remained thin. At 02:50 U.T., the northern ray was wider and extended about one-half the length of the floor. The southern ray looked more like a ridge than before.

At 03:15 U.T., the northern ray widened further. The southern one now appears to be a ray that is in combination with a section of a ridge. It widened, lengthened, and had a broken appearance. Within fifteen minutes, the northern ray widened considerably and lost its former appearance. It extended one-half the length of the floor and appeared to have a narrow shadow cutting across its width on the eastern end. The scope is shaking considerably, making it hard to distinguish finer detail. By 04:15 U.T., the western floor area between the two rays was illuminated, shortening the rays. Thirty minutes later, they weren’t recognizable as previously. I would like to have observed this floor area when completely illuminated, but seeing didn’t allow me to continue.

I was observing numerous rays occurring simultaneously. Making out this report, I realize that I didn’t give it the attention and thoroughness I wish I had. It was a truly interesting sight and well worth further observations.