Waning Gibbous on

Moon phase on 23 September 2013 Monday is Waning Gibbous, 18 days old Moon is in Taurus.

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Moon phase for

Lunar calendar 2013 | September 2013

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

Waning Gibbous 83% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 83% and getting smaller. The 18 days old Moon is in ♉ Taurus.

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Moon phases for next 7 days

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Moon phase and lunation details

4 days after Full Moon

Previous main lunar phase is the Full Moon before 4 days on 19 September 2013 at 11:13.

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.

Moon in ♉ Taurus

Moon is passing about ∠20° of ♉ Taurus tropical zodiac sector.

Apparent angular diameter ∠1807"

Lunar disc appears visually 5.7% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1807" and ∠1913".

Harvest Moon before 4 days

Next Full Moon is the Hunter Moon of October 2013 after 25 days on 18 October 2013 at 23:38.

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 169 / 1122

The Moon is 18 days old. Earth's natural satellite is moving from the middle to the last 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

The length of the lunation is 29 days, 12 hours and 58 minutes. It is 43 minutes longer than the next lunation's length. The lengths of the following synodic months are going to decreasing with the 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 14 minutes longer than the mean synodic month length. It is 6 hours and 49 minutes shorter compared to 21st century's longest synodic month length.

Lunar orbit position on

True anomaly ∠249.2°

At the beginning of the lunation cycle the true anomaly is ∠249.2°. At the beginning of next synodic month the true anomaly is going to be ∠285.3°.

Moon before perigee

7 days after point of perigee on 15 September 2013 at 16:34 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 4 days, until the Moon reaches the point of next apogee on 27 September 2013 at 18:17 in ♋ Cancer.

Previous perigeeNext apogee

Distance to Moon 396 634 km

The Moon is 396 634 km (246 457 mi) away from Earth and getting further over the next 4 days until the point apogee when Earth-Moon distance is going to be 404 309 km (251 226 mi).

Moon after descending node

1 day after descending node on 22 September 2013 at 13:48 in ♉ Taurus. The Moon is located south of the ecliptic over the following 13 days, until the lunar orbit crosses from South to North in ascending node on 6 October 2013 at 22:08 in ♏ Scorpio.

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Draconic month

13 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

10 days since the previous standstill on 12 September 2013 at 18:30 in ♐ Sagittarius when the Moon has reached South declination of ∠-19.685°, the lunar orbit is extending northward over the next 2 days to face maximum declination of ∠19.599° at the point of next northern standstill on 26 September 2013 at 01:03 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 11 days

In 11 days on 5 October 2013 at 00:35 in ♎ Libra 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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