Billy Crater and Mons Hansteen

Observation Notes:

After spending time on Shickard, I moved Northward to Billy Crater. It showed a nice intact rim with a dark flooded floor. There were two white splashes on the south-southwest and south-southeast ends of the crater floor. Immediately north of the crater was a bright white spray that radiated southward. A broad road of lighter material flowed away from the west side of the crater and curved northwest.


Billy Crater is a 46 km wide crater with a 1300 m high rim. Its floor is one of the darkest spots on the moon. It was formed more than 3.2 billion years ago--prior to the lava flows that filled Oceanus Procellarum. The "bright spray" I saw north of Billy is a 30 km wide massif called Mons Hansteen

SubjectBilly Crater and Mons Hansteen
ClassificationLunar Crater and Mountain
PositionWest edge
Phase/Age12 days old
Size*Billy Crater: (dia. 46 km);
Mons Hansteen (width 30 km)
Date/TimeJanuary 22, 2005 - 10:05 PM (January 23, 2005 - 05:05 UT)
Observing Loc.Flagstaff, AZ - Home
InstrumentOrion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag.10 mm + 2X Barlow (240X)
ConditionsClear, cool (34°F)
SourcesThe Moon Observer's Guide By Peter Grego

* Based on published data.

The Cerulean Arc

My weblog for
everything else non-astronomy

Pin at will!

(Thanks for maintaining
return links.)

About this Entry

This page contains a single entry by Jeremy Perez published on January 22, 2005 10:05 PM.

Schickard and Lehmann Craters was the previous entry in this blog.

Auriga Constellation is the next entry in this blog.

Find recent content on the main index or look in the archives to find all content.


Monthly Archives

Powered by Movable Type 5.2.3