Waning Gibbous on

Moon phase on 20 September 2013 Friday is Waning Gibbous, 16 days old Moon is in Aries.

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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 99% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 99% and getting smaller. The 16 days old Moon is in ♈ Aries.

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Moon phases for next 7 days

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Moon phase and lunation details

1 day after Full Moon

Previous main lunar phase is the Full Moon before 1 day 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 ♈ Aries

Moon is passing about ∠11° of ♈ Aries tropical zodiac sector.

Apparent angular diameter ∠1872"

Lunar disc appears visually 2.1% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1872" and ∠1911".

Harvest Moon before 1 day

Next Full Moon is the Hunter Moon of October 2013 after 28 days on 18 October 2013 at 23:38.

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 169 / 1122

The Moon is 16 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

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

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 will be ∠285.3°. The length of upcoming synodic months will keep decreasing 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 15 September 2013 at 16:34 in ♑ Capricorn. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 7 days, until it get to the point of next apogee on 27 September 2013 at 18:17 in ♋ Cancer.

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Distance to Moon 382 962 km

Moon is 382 962 km (237 962 mi) away from Earth on this date. Moon moves farther next 7 days until apogee, when Earth-Moon distance will reach 404 309 km (251 226 mi).

Moon before descending node

10 days after its ascending node on 9 September 2013 at 17:29 in ♏ Scorpio, the Moon is following the northern part of its orbit for the next 2 days, until it will cross the ecliptic from North to South in descending node on 22 September 2013 at 13:48 in ♉ Taurus.

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Draconic month

10 days after beginning of current draconic month in ♏ Scorpio, the Moon is moving from the beginning to the first part of it.

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Moon before northern standstill

7 days after previous South standstill on 12 September 2013 at 18:30 in ♐ Sagittarius, when Moon has reached southern declination of ∠-19.685°. Next 5 days the lunar orbit moves northward to face North declination of ∠19.599° in the next northern standstill on 26 September 2013 at 01:03 in ♊ Gemini.

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Syzygy in 14 days

After 14 days on 5 October 2013 at 00:35 in ♎ Libra, the Moon will be in Full Moon geocentric opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy.

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