First Quarter Moon
First Quarter MoonImage credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.(large image)

First Quarter in Aries

First Quarter on . Illuminated surface of the Moon is 58% and growing larger. Lunar cycle is 8 days young.

* The exact date and time of this First Quarter phase is on 19 December 2099 at 14:22 UTC.

Moonrise and moonset

Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.

Upcoming main moon phases

Main moon phases of the following lunar cycle.

Moon phase and lunation details

Moon in ♈ Aries

Moon is passing about ∠9° of ♈ Aries tropical zodiac sector.

Cold Moon after 7 days

Next Full Moon is the Cold Moon of December 2099 after 7 days on 27 December 2099 at 12:58.

Moderate tide

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.

Apparent angular diameter ∠1768"

Lunar disc appears visually 9.8% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1768" and ∠1950".

Lunation 1236 / 2189

The Moon is 8 days young and navigating through the first part of the current synodic month. This is lunation 1236 of Meeus index or 2189 from Brown series.

Synodic month length 29.57 days

The length of this lunation is 29 days, 13 hours and 47 minutes and it is 2 hours and 12 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°).

Lunation length longer than mean

The length of the current synodic month is 1 hour and 3 minutes longer than the mean synodic month length. It is 6 hours shorter compared to 21st century's longest synodic month length.

Lunar orbit details for

True anomaly ∠49.8°

The true anomaly of the Moon orbit at the beginning of this lunation cycle is ∠49.8° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠81.3°.

Moon at apogee

Moon is at apogee at 13:16 about 11 days since last perigee on 8 December 2099 at 17:50 in ♎ Libra the lunar orbit is going to narrow while the Moon is moving towards the Earth over the upcoming 13 days until point of next perigee on 3 January 2100 at 08:57 in ♎ Libra.

Distance to Moon 404 339 km

This apogee Moon is 404 339 km (251 245 mi) away from Earth. It is 1 069 km further than the mean apogee distance, but it is still 2 370 km closer than the farthest apogee of 21st century.

Moon after ascending node

1 day after ascending node on 19 December 2099 at 01:02 in ♓ Pisces the Moon is positioned north of the ecliptic over the following 12 days until the lunar crosses the ecliptic again from North to South in descending node on 1 January 2100 at 21:13 in ♍ Virgo.

Moon before northern standstill

7 days since the last southern standstill on 12 December 2099 at 13:59 in ♐ Sagittarius when the Moon has reached South declination of ∠-28.351° the lunar orbit is extending northward over the next 6 days to face maximum declination of ∠28.345° at the point of next northern standstill on 26 December 2099 at 23:34 in ♊ Gemini.

Draconic month

1 day since the beginning of this draconic month in ♓ Pisces the Moon is navigating from the beginning to the first part of the lunar cycle.

Syzygy in 7 days

In 7 days on 27 December 2099 at 12:58 in ♋ Cancer 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.

Lunar calendar

Sources and credits

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