Home > Ephemeris Program, The Moon > 10/22/2015 – Ephemeris – My favorite lunar feature

10/22/2015 – Ephemeris – My favorite lunar feature

October 22, 2015

Ephemeris for Thursday, October 22nd.  The Sun will rise at 8:07.  It’ll be up for 10 hours and 39 minutes, setting at 6:46.   The Moon, 2 days past first quarter, will set at 3:10 tomorrow morning.

The Moon tonight is revealing my favorite feature, Sinus Iridium or Bay of Rainbows.  Unfortunately features on the Moon are not that colorful.  The Bay of Rainbows is surrounded on three sides by a semicircular mountain range called the Jura Mountains which is actually a broken down crater wall.  The Bay is a bay in Mare Imbrium, the Sea of Showers.  It is the nomenclature of land forms on planets and moons that still have Latin names in astronomy.  That and constellations.  Of course the Bay of Rainbows and the Sea of Showers aren’t real bodies of water.  These were the product of the imaginations of astronomers looking through their primitive telescopes, at a completely alien landscape.

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


Sinis Iridium on Moon Globe

The Moon tonight with Sinus Iridium peeking out into the morning sunlight on the Moon, 9 p.m. October 2015. Created using Virtual Moon Atlas.

LRO data

Sinus Iridium photographed by the Lunar Reconnaissance Orbiter as texture mapped on the globe of the Virtual Moon Atlas.

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