First Quarter on . The illuminated surface of the moon is 51% and growing larger. The lunar cycle is 7 days young.
* The exact date and time of this First Quarter phase is on 21 September 2099 at 09:48 UTC.
The moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.
Slide horizontally to discover the moon phase on nearby dates.
Main moon phases of the following lunar cycle.
Moon is passing first ∠0° of ♐ Sagittarius tropical zodiac sector.
Next Full Moon is the Harvest Moon of September 2099 after 7 days on 29 September 2099 at 10:45.
There is low ocean tide on this date. Sun and Moon gravitational forces are not aligned, but meet at big angle, so their combined tidal force is weak.
Lunar disc appears visually 2.1% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1872" and ∠1912".
The Moon is 7 days young and navigating through the first part of the current synodic month. This is lunation 1233 of Meeus index or 2186 from Brown series.
The length of this lunation is 29 days, 8 hours and 42 minutes and it is 1 hour and 15 minutes shorter than the upcoming lunation's length. The lengths of the following synodic months are going to increase with the lunar orbit true anomaly getting closer to the value it has at the point of New Moon at apogee (∠180°).
The length of the current synodic month is 4 hours and 2 minutes shorter than the mean synodic month length. It is 2 hours and 7 minutes longer compared to 21st century's shortest synodic month length.
The true anomaly of the Moon orbit at the beginning of this lunation cycle is ∠355.4° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠10.7°.
6 days since point of perigee on 14 September 2099 at 23:26 in ♍ Virgo the lunar orbit is getting widen while the Moon is moving away from the Earth. It will keep this direction over the next 7 days until the Moon reaches the point of next apogee on 28 September 2099 at 22:34 in ♓ Pisces.
The Moon is 382 963 km (237 962 mi) away from Earth and getting further over the next 7 days until the point apogee when Earth-Moon distance is going to be 406 272 km (252 446 mi).
6 days after descending node on 14 September 2099 at 23:44 in ♍ Virgo the Moon is positioned south of the ecliptic over the following 7 days until the lunar crosses the ecliptic again from South to North in ascending node on 28 September 2099 at 14:28 in ♓ Pisces.
At 11:17 the Moon is meeting its standstill point to reach South declination of ∠-28.686°. This is the year's southernmost lunar standstill of 2099. Over the upcoming 14 days the lunar orbit is going to tilt northward to face maximum declination of ∠28.657° at the point of next northern standstill in ♊ Gemini on 6 October 2099 at 05:56.
20 days since the beginning of this draconic month in ♓ Pisces the Moon is navigating from the second to the final part of the lunar cycle.
In 7 days on 29 September 2099 at 10:45 in ♈ Aries the Moon is going to be in a Full Moon geocentric opposition with the Sun and thus forming the next Sun-Earth-Moon syzygy alignment.
Parts of this Lunar Calendar are based on Planetary Ephemeris Data Courtesy of Fred Espenak, www.Astropixels.com
Moon phase image credit to NASA/Goddard Space Flight Center Scientific Visualization Studio, svs.gsfc.nasa.gov