Diëteris
A diëteris or biëteris is the Greek name for the period over 2 tropical years where the Moon phase occurs around 8 years later. It corresponds to 25 synodic months, 2.0213017935214 sidereal months, 27.129896020025 draconic months, 26.792841801954996 anomalistic months, and 738.264699074075 days. It’s the result of intercalating 2 lunar years (which’s 24 synodic months, 1.9404497217805439 sidereal months, 26.044700179224 draconic months, 25.721128129876796, and 708.734111111112 days). It approximates 2 synodic periods of Uranus, meaning 2 new/full moons in opposite/conjunction with Uranus occur a diëteris apart. Though adding an extra synodic month forms a long diëteris, which is 28.1020710232132 sidereal months, 28.215091860826 draconic months, 27.864555474033196 anomalistic months, and 767.7952870370381 days, and is sometimes useful for calculating oppositions with Mars.
The Urban Dictionary Mug
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Sus cup I bought the sus mug for the sus king Daequan
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My mug came in broken but Urban Dictionary replaced it at no extra charge!
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As always, easy to order and not-too-long of a wait for the finished product to arrive. It’s well-printed, and very sturdy. A great gag present for wedding party members.
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Exactly as expected!
My order was delivered very quickly and was high quality. Glad to add it to my mug shelf.
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