January Waning Crescent Moon at Most Distant Apogee, and in Conjunction with Mercury and Saturn

   Our Moon reaches apogee, (greatest distance from Earth), on Monday January 15th. At that time the waning crescent Moon will more or less be at a distance of 31.86 Earth diameters (406,464 km or 252,587 miles) from the Earth. This is the greatest distance between the Earth and our Moon for this year. The next most distant apogee occurs during July when the full Moon will be at an apogee distance of 31.84 Earth diameters (406,223 km or 252,415 miles).

   On the day of the apogee the 28-day old and very thin waning crescent Moon rises between Mercury and Saturn. However only about 2% of the Moon’s disk will be showing and moonrise is only about one-half hour before sunrise so the Moon may be a challenge to see.

   Does our Moon actually go around the Earth as the graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*

*Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”


Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.

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