Archive for June 5, 2014

06/05/2014 – Ephemeris – A remarkable crater visible on the Moon tonight

June 5, 2014 Comments off

Ephemeris for Thursday, June 5th.  Today the sun will be up for 15 hours and 25 minutes, setting at 9:23.   The moon, at first quarter today, will set at 2:05 tomorrow morning.  Tomorrow the sun will rise at 5:58.

Near the Moon’s sunrise terminator at the southern half of our satellite are three large craters roughly arranged parallel to the terminator.  The northernmost is the largest named Ptolemaeus.  Just south of it is Alphonsus, and the third is Arzachel.  Of the three Alphonsus is suspected of activity over the years.  In 1956 Dinsmore Alter noticed a haze that obscured some of the cracks in the floor of Alphonsus and took photographs.  The ultraviolet photos showed something, but his infrared photos did not.  In 1959, Soviet astronomer Nicolai Kozyrev obtained spectra of a glow. In 1965 the last Ranger probe was sent to Alphonsus to see what there was to see, and apparently reported nothing unusual.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.



The Moon tonight, June 5, 2014. Created using Virtual Moon Atlas.

Ranger image 1

Ranger 9 Image of Alphonsus #1. Credit NASA.

Ranger Image 2

Ranger 9 Image of Alphonsus #2. Credit NASA.

Ranger Inage 3

Ranger 9 Image of Alphonsus #3. Credit NASA.