Last Quarter on

Moon phase on 17 December 2011 Saturday is Last Quarter, 21 days old Moon is in Virgo.

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Moon phase for

Lunar calendar 2011 | December 2011

Last Quarter phase
Last Quarter phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

Last Quarter 56% illuminated

Last Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 56% and getting smaller. The 21 days old Moon is in ♍ Virgo.

* The exact date and time of this Last Quarter phase is on 18 December 2011 at 00:48 UTC.

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Moon phases for next 7 days

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Moon phase and lunation details

Moonrise and moonset

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

Moon in ♍ Virgo

Moon is passing about ∠18° of ♍ Virgo tropical zodiac sector.

Apparent angular diameter ∠1947"

Lunar disc appears visually 0.1% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1947" and ∠1950".

Wolf Moon after 22 days

Next Full Moon is the Wolf Moon of January 2012 after 22 days on 9 January 2012 at 07:30.

Upcoming main Moon phases

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.

Lunation 147 / 1100

The Moon is 21 days old. Earth's natural satellite is moving through the last part of current synodic month. This is lunation 147 of Meeus index or 1100 from Brown series.

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Synodic month length 29.5 days

The length of the lunation is 29 days, 11 hours and 57 minutes. It is 1 hour and 36 minutes shorter than the next lunation's length. The lengths of the following synodic months are going to increasing with the true anomaly getting closer to the value it has at the point of New Moon at apogee (∠180°).

Lunation length shorter than mean

The length of the current synodic month is 47 minutes shorter than the mean synodic month length. It is 5 hours and 22 minutes longer compared to 21st century's shortest synodic month length.

Lunar orbit position on

True anomaly ∠21.6°

At the beginning of the lunation cycle the true anomaly is ∠21.6°. At the beginning of next synodic month the true anomaly is going to be ∠42.1°.

Moon before apogee

11 days after point of apogee on 6 December 2011 at 01:13 in ♈ Aries. The lunar orbit is getting narrow, while the Moon is moving towards the Earth. It will keep this direction over the next 4 days, until the Moon reaches the point of next perigee on 22 December 2011 at 02:56 in ♏ Scorpio.

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Distance to Moon 368 111 km

The Moon is 368 111 km (228 734 mi) away from Earth and getting closer over the next 4 days until the point perigee when Earth-Moon distance is going to be 364 801 km (226 677 mi).

Moon before ascending node

7 days after descending node on 10 December 2011 at 07:04 in ♊ Gemini. The Moon is located south of the ecliptic over the following 5 days, until the lunar orbit crosses from South to North in ascending node on 23 December 2011 at 11:36 in ♐ Sagittarius.

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Draconic month

21 days since the beginning of current draconic month in ♐ Sagittarius, the Moon is navigating from the second to the final part of the cycle.

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Moon before southern standstill

6 days since the previous standstill on 10 December 2011 at 13:37 in ♊ Gemini when the Moon has reached North declination of ∠22.554°, the lunar orbit is extending southward over the next 6 days to face maximum declination of ∠-22.554° at the point of next southern standstill on 23 December 2011 at 17:25 in ♐ Sagittarius.

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Syzygy in 7 days

In 7 days on 24 December 2011 at 18:06 in ♐ Sagittarius 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.

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