The surface of the crater is cut by a system of several channels (rille), which give a “fractured” appearance to the floor. This channel system was called Rimae Gassendi. The various channels in the crater floor are the result of volcanic and tectonic forces.
In April 1966, members of the "BAA Lunar Section" (British Astronomical Association - Lunar Section) reported the appearance of a sudden reddish glow in Gassendi. This reddish color was confirmed by several seasoned observers. Thereafter, Gassendi became a hot target for the search for TLP (Transient Lunar Phenomena) - transient, brief or transient lunar phenomenon, which are described as quick appearances of lights, colors or change of appearance in the visual, which could demonstrate the existence of volcanic manifestations, gas escapes or other geological processes that supposedly would imply that the moon would not be geologically dead.
Best details:
https://www.astrobin.com/full/ilwv1w/0/?nc=user
Equipment
MEADE LX200 10 "UHTC
ZWO Optical ASI 462MC
Filter: Planetary Baader L 1.25 "
Accessory: TeleVue Powermate 2.0x
Mount: Ioptron Cem60
Polar alignment: Sharcap
Capture: SharpCap V3.0
Processing: Photoshop CS6 ,, AutoStakkert AutoStackert !, Registax 6.
10/28/2020
São Paulo-SP-Brazil
Copyright: Fernando Oliveira de Menezes
Email: Barretosmed@hotmail.com