Contains:  Solar system body or event
Clavius-Tycho and East, 


            Bob Gillette

Clavius-Tycho and East

Acquisition type: Lucky imaging

Imaging telescopes or lenses: Santel MK-91 Mak-Cass 230 mm f/13

Imaging cameras: FLIR/Point Grey Grasshopper 2 GigE

Mounts: Astro-Physics AP 900 GTO

Guiding telescopes or lenses: Hutech Borg 60mm

Guiding cameras: ORION StarShoot AutoGuider

Software: Topaz Denoise AI  ·  Registax 6  ·  Maxim DL5  ·  Software Bisque TheSky6  ·  FireCapture  ·  AS!2

Filters: Baader IR 685

Accessory: Spike-a Bahtinov Mask  ·  Technical Innovations RoboFocus

Date: Oct. 25, 2020

Time: 21:15

Frames: 380

FPS: 21.00000

Focal length: 3000

Seeing: 3

Transparency: 4

Resolution: 1400x1085

Locations: Roughacre Observatory, Ossipee, NH, United States

Data source: Backyard


I was intrigued by the broad, dark streaks stretching across the center of this low-angle illumination scene. Clavius and Tycho are at the far dim left, Maginus between them, Stoefler-Faraday complex in center and Miller (with the small central peak) just above Stoefler.

Debris rays in direct illumination are generally high-albedo, lighter than surrounding surface. But perhaps the low-angle sun here makes these rays appear darker? They appear to emanate from the area of Tycho, the Moon’s most prominent source of debris rays when viewed from a wide angle.