British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

Hippalus and Ramsden rilles


Expand image

About this observation
Chris Hooker
Time of observation
03/04/2020 - 19:58
Hippalus rilles
Observing location
Didcot, Oxfordshire
254 mm Newtonian
5x Powermate
ZWO ASI174MM camera
Baader 610 nm & IR-cut filters
1/40 sec

The region to the east of mare Humorum has many rilles. The Hippalus rille system (upper part of image) curves around the mare and was formed by crustal stretching as the weight of the mare depressed the surface. There is a complex system of intersecting rilles around the small crater Ramsden, lower centre. Finally, the linear Hesiodus rille extends from just north of the crater Capuanus and out of the frame to the upper right.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.