January 13, 2019

13 Jan

January 13, 2019


First Quarter Moon

11:46 pm MST, 10:46 pm PST. Occurs following day: 6:46 am UT; 1:46 am EST; 12:46 am CST

Moon’s age: 8 days 8 hours (at noon EST)

Fraction of the Moon illuminated: 40 percent (midnight EST); 44 percent (noon EST)

On this day in 1888, the National Geographic Society was founded at a meeting held at the Cosmos Club in Washington, D.C. The 33 founders intended it to be “a society for the increase and diffusion of geographic knowledge. The first issue of the magazine was published in October of the same year.

On this day in 1957, the first Frisbees were manufactured by the Wham-O Company. The original name for the flying disc was the Pluto Platter — the Frisbee name was introduced in 1958. The platter’s design was originally invented and patented in 1948 by two men in Los Angeles; the term “Frisbee” was adapted from Frisbie Pies, the name stamped on pie tins made in Bridgeport, Connecticut and used by generations of Yale University students for sport.

The 2019 Moon Calendar is currently available from The Experiment Publishing. The 2019 Moon Almanac and The Moon Book 3rd Edition are also available. Click through for purchase options.

The Moon Almanac 2019 by [Long, Kim]      



Times. Time of day is indicated as UT (Universal Time), EST (Eastern Standard Time), CST (Central Standard Time), MST (Mountain Standard Time), and PST (Pacific Standard Time). To figure Daylight Saving Time when in effect locally, subtract one hour from the time indicated for a U.S. time zone. Because of the time difference between UT and North America, at the time of a full moon or other moon phase, the date may fall a day earlier in the United States (indicated when this occurs).

Fraction of the Moon illuminated. The percentage of the front (visible) side of the moon that is lit by sunlight, with 0 percent indicating a new moon (not visible) and 100 percent indicating a full moon (no shadow visible); quarter moons are 50 percent illuminated. Below 5 percent illumination, when the lit portion is a slim crescent (on the left side for a waning moon – “old crescent moon” and on the right side for a waxing moon – “new crescent moon”) it may not be visible in most locations. The percentage is computed by the Astronomical Applications Department/U.S. Naval Observatory. In the course of a 24 hour period, the percentage will either increase or decrease at a varying rate depending on the phase, with the slowest visible change occurring around the time of the full moon and the fastest visible change occurring around the time of the new moon. This is due to the effect of light from the sun illuminating the spherical surface of the Moon.

Moon’s age. One complete lunation (a complete cycle from one new moon to the next new moon) occurs in an average of 29.5 days. The “moon’s age” is the number of calendar days from the time of the new moon, shown here with the number of hours depicted as a rounded number. The figure listed is for noon, EST.

©  Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Kim Long.


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