Gibbous ♈ Aries
Moon phase on 20 December 2023 Wednesday is First Quarter, 8 days young Moon is in Aries.Share this page: twitter facebook linkedin
First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 58% and growing larger. The 8 days young Moon is in ♈ Aries.
* The exact date and time of this First Quarter phase is on 19 December 2023 at 18:39 UTC.
Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.
Moon is passing about ∠8° of ♈ Aries tropical zodiac sector.
Lunar disc appears visually 0.5% wider than solar disc. Moon and Sun apparent angular diameters are ∠1960" and ∠1950".
Next Full Moon is the Cold Moon of December 2023 after 6 days on 27 December 2023 at 00:33.
There is medium ocean tide on this date. Sun and Moon gravitational forces are not aligned, but meet at very acute angle, so their combined tidal force is moderate.
The Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 296 of Meeus index or 1249 from Brown series.
Length of current 296 lunation is 29 days, 12 hours and 25 minutes. It is 1 hour and 23 minutes longer than next lunation 297 length.
Length of current synodic month is 19 minutes shorter than the mean length of synodic month, but it is still 5 hours and 50 minutes longer, compared to 21st century shortest.
This lunation true anomaly is ∠303.6°. At the beginning of next synodic month true anomaly will be ∠328°. The length of upcoming synodic months will keep decreasing since the true anomaly gets closer to the value of New Moon at point of perigee (∠0° or ∠360°).
3 days after point of perigee on 16 December 2023 at 18:53 in ♒ Aquarius. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 12 days, until it get to the point of next apogee on 1 January 2024 at 15:28 in ♍ Virgo.
Moon is 365 704 km (227 238 mi) away from Earth on this date. Moon moves farther next 12 days until apogee, when Earth-Moon distance will reach 404 911 km (251 600 mi).
11 days after its descending node on 8 December 2023 at 15:24 in ♎ Libra, the Moon is following the southern part of its orbit for the next day, until it will cross the ecliptic from South to North in ascending node on 21 December 2023 at 13:54 in ♈ Aries.
26 days after beginning of current draconic month in ♈ Aries, the Moon is moving from the second to the final part of it.
6 days after previous South standstill on 13 December 2023 at 21:51 in ♐ Sagittarius, when Moon has reached southern declination of ∠-28.151°. Next 6 days the lunar orbit moves northward to face North declination of ∠28.131° in the next northern standstill on 26 December 2023 at 21:50 in ♊ Gemini.
After 6 days on 27 December 2023 at 00:33 in ♋ Cancer, the Moon will be in Full Moon geocentric opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy.