L.T.P. REPORT
4 NOVEMBER 2001
07:00 TO 07:43 U.T.
PROCLUS
Robin Gray of Winnemucca, Nevada, U.S.A. reported a contrast effect and brightening in the crater Proclus. Using a 15.2 cm refractor he conducted Moon blink with Wratten 25a and 38a blue. His report goes as follows." Moon Blink carried out. In Red 25 Proclus looked nearly the same as in white light. Through the Blue 38a filter, however, only the brilliant lit south east wall was clearly visible. The northeast wall was very dim with this filter. With no filters the NE and SE wall were brilliantly lit, the SE wall was almost as bright as Aristarchus. A thread like strip along the NW wall, possibly the rim of the crater, was also brilliantly illuminated. The interior of the crater was a featureless stygian black with the exception of a brilliant (intensity 9) thread of light that ran parallel to the illuminated east wall. Whether this was an L.T.P. or an optical effect of atmospheric turbulence is unknown, did not see anything similar elsewhere along the terminator though". To contact the observer Robin Gray sevenvalleysent@yahoo.com
The drawing on the left depicts Proclus in white light with albedo measurement indicated on the crater. The drawing on the right shows the crater when using Wratten 38a Blue.
It would appear that a reddish event may have taken place on this crater, according to the books on the subject and object that is red will appear pale in the red filter and darker in the blue. So something had taken place to cause this obscuration of this portion of the rim in blue light. The Moon age at the time of the observation the Moon age 18.4days old the colongitude 131.24
CLEMENTINE PHOTOGRAPH
The photograph of Proclus by the Clementine space craft shows the crater nearly dead center in this picture. The Mare Crisium is located just to the right, the right side of the picture is east with the north being at the top.
SOLAR TERRESTRIAL ACTIVITY REPORT
When examining the Solar Terrestrial Activity Report data I found there to be an increase in activity for the Planetary A index and the Solar Flux on the day preceding the reported event.
If you have any questions or wish to submit your own comments about this observation you can contact the L.T.P. recorder David O. Darling at: DOD121252@AOL.COM