First Quarter on

Moon phase on 13 September 2013 Friday is First Quarter, 8 days young Moon is in Capricorn.

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Moon phase for

Lunar calendar 2013 | September 2013

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

First Quarter 59% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 59% and growing larger. The Moon is in ♑ Capricorn.

* The exact date and time of this First Quarter phase is on 12 September 2013 at 17:08 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 is entering ♑ Capricorn

Moon is passing first ∠1° of ♑ Capricorn tropical zodiac sector.

Upcoming main Moon phases

Harvest Moon after 5 days

Next Full Moon is the Harvest Moon of September after 5 days on 19 September 2013 at 11:13.

Apparent angular diameter ∠1972"

Lunar disc appears visually 3.32% wider than solar disc. Moon and Sun apparent angular diameters are ∠1972" and ∠1907".

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 169 / 1122

Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 169 of Meeus index or 1122 from Brown series.

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Synodic month length 29.54 days

Length of current 169 lunation is 29 days, 12 hours and 58 minutes. It is 43 minutes longer than next lunation 170.

Lunation length longer than mean

Length of current synodic month is 14 minutes longer than the mean length of synodic month, but it is still 6 hours and 49 minutes shorter, compared to 21st century longest.

Lunar orbit position on

True anomaly ∠249.2°

This lunation true anomaly is ∠249.2°. At the beginning of next synodic month true anomaly is ∠285.3°. The length of upcoming synodic months decreases since the true anomaly gets closer to the value of New Moon at point of perigee (∠0°or∠360°).

Moon before perigee

13 days after point of apogee on 30 August 2013 at 23:46, lunar orbit gets closer while the Moon moves inward the Earth. It keeps this direction for next 2 days until it gets to the point of perigee on 15 September 2013 at 16:34.

Distance to Moon 363 522 km

Moon is 363 522 km (225 882 mi) away from Earth on this date. At previous apogee point before 13 days, distance is 404 883 km (251 583 mi). Moon moves closer next 2 days until perigee, when Earth-Moon distance reaches 367 388 km (228 284 mi).

Moon after ascending node

3 days after its ascending node on 9 September 2013 at 17:29, the Moon follows the northern part of its orbit for the next 9 days untill it crosses the ecliptic from North to South in descending node on 22 September 2013 at 13:48.

Draconic month

3 days after its beginning, the Moon is moving from the beginning to the first part of current draconic month.

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Moon after southern standstill

1 day after previous South standstill on 12 September 2013 at 18:30, when Moon reaches southern declination of ∠-19.685°, lunar orbit moves northward for the next 12 days to face North declination of ∠19.599° in the next northern standstill on 26 September 2013 at 01:03.

Syzygy in 5 days

After 5 days the Moon is in Full Moon opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy on 19 September 2013 at 11:13.

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