First Quarter on

Moon phase on 18 February 2013 Monday is First Quarter, 8 days young Moon is in Gemini.

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Moon phase for

Lunar calendar 2013 | February 2013

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

First Quarter 56% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 56% and growing larger. The 8 days young Moon is in ♊ Gemini.

* The exact date and time of this First Quarter phase is on 17 February 2013 at 20:31 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 noon and sets at midnight. It is visible high in the southern sky in early evening.

Moon in ♊ Gemini

Moon is passing about ∠7° of ♊ Gemini tropical zodiac sector.

Apparent angular diameter ∠1769"

Lunar disc appears visually 9.2% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1769" and ∠1941".

Snow Moon after 7 days

Next Full Moon is the Snow Moon of February 2013 after 7 days on 25 February 2013 at 20:26.

Upcoming main Moon phases

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.

Lunation 162 / 1115

The Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 162 of Meeus index or 1115 from Brown series.

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Synodic month length 29.52 days

The length of the lunation is 29 days, 12 hours and 31 minutes. It is 1 hour and 13 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 13 minutes shorter than the mean synodic month length. It is 5 hours and 56 minutes longer compared to 21st century's shortest synodic month length.

Lunar orbit position on

True anomaly ∠44.2°

At the beginning of the lunation cycle the true anomaly is ∠44.2°. At the beginning of next synodic month the true anomaly is going to be ∠73.6°.

Moon before perigee

10 days after point of perigee on 7 February 2013 at 12:09 in ♑ Capricorn. The lunar orbit is getting widen, while the Moon is moving away from the Earth. It will keep this direction over the next day, until the Moon reaches the point of next apogee on 19 February 2013 at 06:30 in ♊ Gemini.

Previous perigeeNext apogee

Distance to Moon 405 085 km

The Moon is 405 085 km (251 708 mi) away from Earth and getting further over the next day until the point apogee when Earth-Moon distance is going to be 404 475 km (251 329 mi).

Moon after descending node

1 day after descending node on 17 February 2013 at 02:57 in ♉ Taurus. The Moon is located south of the ecliptic over the following 12 days, until the lunar orbit crosses from South to North in ascending node on 3 March 2013 at 02:30 in ♏ Scorpio.

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Draconic month

14 days since the beginning of current draconic month in ♏ Scorpio, the Moon is navigating from the second to the final part of the cycle.

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Moon before northern standstill

12 days since the previous standstill on 6 February 2013 at 00:27 in ♐ Sagittarius when the Moon has reached South declination of ∠-20.704°, the lunar orbit is extending northward over the next day to face maximum declination of ∠20.583° at the point of next northern standstill on 19 February 2013 at 13:35 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 7 days

In 7 days on 25 February 2013 at 20:26 in ♍ Virgo 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.

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