Waning Gibbous on

Moon phase on 23 August 2013 Friday is Waning Gibbous, 17 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2013 | August 2013

Waning Gibbous phase
Waning Gibbous phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

Waning Gibbous 92% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 92% and getting smaller. The Moon is in ♈ Aries.

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Moon phases for next 7 days

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Moon phase and lunation details

Moonrise and moonset

Moon rises in the evening and sets in the morning. It is visible to the southwest and it is high in the sky after midnight.

2 days after Full Moon

Previous main lunar phase is the Full Moon before 2 days on 21 August 2013 at 01:45.

Moon is entering ♈ Aries

Moon is passing first ∠3° of ♈ Aries tropical zodiac sector.

Upcoming main Moon phases

Sturgeon Moon before 2 days

Next Full Moon is the Harvest Moon of September after 26 days on 19 September 2013 at 11:13.

Apparent angular diameter ∠1881"

Lunar disc appears visually 0.87% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1881" and ∠1898".

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 168 / 1121

Moon is 17 days old. Earth's natural satellite is moving from the middle to the last part of current synodic month. This is lunation 168 of Meeus index or 1121 from Brown series.

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Synodic month length 29.57 days

Length of current 168 lunation is 29 days, 13 hours and 45 minutes. It is 47 minutes longer than next lunation 169.

Lunation length longer than mean

Length of current synodic month is 1 hour and 1 minute longer than the mean length of synodic month, but it is still 6 hours and 2 minutes shorter, compared to 21st century longest.

Lunar orbit position on

True anomaly ∠216.9°

This lunation true anomaly is ∠216.9°. At the beginning of next synodic month true anomaly is ∠249.2°. 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 after perigee

4 days after point of perigee on 19 August 2013 at 01:26, lunar orbit gets wider while the Moon moves outward the Earth. It keeps this direction for next 7 days until it gets to the point of apogee on 30 August 2013 at 23:46.

Distance to Moon 380 991 km

Moon is 380 991 km (236 737 mi) away from Earth on this date. At previous perigee point before 4 days, distance is 362 265 km (225 101 mi). Moon moves farther next 7 days until apogee, when Earth-Moon distance reaches 404 883 km (251 583 mi).

Moon before descending node

9 days after its ascending node on 13 August 2013 at 16:20, the Moon follows the northern part of its orbit for the next 2 days untill it crosses the ecliptic from North to South in descending node on 26 August 2013 at 08:19.

Draconic month

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

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Moon before northern standstill

6 days after previous South standstill on 16 August 2013 at 12:06, when Moon reaches southern declination of ∠-19.906°, lunar orbit moves northward for the next 6 days to face North declination of ∠19.801° in the next northern standstill on 29 August 2013 at 17:03.

Syzygy in 12 days

After 12 days the Moon is in New Moon conjunction with the Sun and this alignment forms next Sun-Moon-Earth syzygy on 5 September 2013 at 11:36.

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