Marius' Hills Region: possible Skylight

Caption JAXA:"Images of a possible 65 mt diameter Lunar Lava Tube Skylight in the Marius Hills District taken by SELENE Terrain Camera (TC) and Multi-band Imager (MI).

(Upper left frame) Overview of the Region (TC, 20 May 2008; 12,9 to 14,4° North Latitude and 55,7 to 57° West Longitude - approx. 35 x 45 Km.
(Upper right frame) The Skylight (a.k.a.: the "Marius Hills' Hole"; MHH) at 303,3° East and 14,2° North, in a Rille ("Rille A").
(Lower four frames) Enlarged TC and MI images of MHH (1st and 2nd frame from the left are TC images from 20 May 2008 and 21 January 2009; 3rd and 4th are MI images from 17 March 2009 and 13 April 2009).

Arrows indicate the directions of Solar Illumination (I) and the view vector from the camera (V).

The depth of MHH has been estimated to be 80 to 88 meters. If there exists a Lava Tube under MHH, its maximum width can be wider than a few hundred meters".