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

Last Quarter in Libra

Last Quarter on . Illuminated surface of the Moon is 54% and getting smaller. Lunar cycle is 21 days old.

* The exact date and time of this Last Quarter phase is on 19 January 2017 at 22:14 UTC.

Moonrise and moonset

Moon rises at midnight and sets at noon. It is visible to the south in the morning.

Upcoming main moon phases

Main moon phases of the following lunar cycle.

Moon phase and lunation details

Moon in ♎ Libra

Moon is passing about ∠25° of ♎ Libra tropical zodiac sector.

Snow Moon after 22 days

Next Full Moon is the Snow Moon of February 2017 after 22 days on 11 February 2017 at 00:33.

Neap tide

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.

Apparent angular diameter ∠1784"

Lunar disc appears visually 8.9% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1784" and ∠1950".

Lunation 210 / 1163

The Moon is 21 days old and navigating through the last part of the current synodic month. This is lunation 210 of Meeus index or 1163 from Brown series.

Synodic month length 29.72 days

The length of this lunation is 29 days, 17 hours and 14 minutes and it is 2 hours and 23 minutes longer than the upcoming lunation's length. The lengths of the following synodic months are going to decrease with the lunar orbit true anomaly getting closer to the value it has at the point of New Moon at perigee (∠0° or ∠360°).

Lunation length longer than mean

The length of the current synodic month is 4 hours and 30 minutes longer than the mean synodic month length. It is 2 hours and 33 minutes shorter compared to 21st century's longest synodic month length.

Lunar orbit details for

True anomaly ∠223.4°

The true anomaly of the Moon orbit at the beginning of this lunation cycle is ∠223.4° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠259.5°.

Moon before apogee

9 days since point of perigee on 10 January 2017 at 06:07 in ♊ Gemini the lunar orbit is getting widen while the Moon is moving away from the Earth. It will keep this direction over the next 2 days until the Moon reaches the point of next apogee on 22 January 2017 at 00:14 in ♐ Sagittarius.

Distance to Moon 401 889 km

The Moon is 401 889 km (249 722 mi) away from Earth and getting further over the next 2 days until the point apogee when Earth-Moon distance is going to be 404 913 km (251 601 mi).

Moon after ascending node

4 days after ascending node on 15 January 2017 at 10:45 in ♍ Virgo the Moon is positioned north of the ecliptic over the following 10 days until the lunar crosses the ecliptic again from North to South in descending node on 29 January 2017 at 22:21 in ♒ Aquarius.

Moon before southern standstill

8 days since the last northern standstill on 11 January 2017 at 09:32 in ♋ Cancer when the Moon has reached North declination of ∠18.932° the lunar orbit is extending southward over the next 5 days to face maximum declination of ∠-18.900° at the point of next southern standstill on 25 January 2017 at 11:59 in ♑ Capricorn.

Draconic month

4 days since the beginning of this draconic month in ♍ Virgo the Moon is navigating from the beginning to the first part of the lunar cycle.

Syzygy in 8 days

In 8 days on 28 January 2017 at 00:07 in ♒ Aquarius the Moon is going to be in a New Moon geocentric conjunction with the Sun and thus forming the next Sun-Moon-Earth 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