Waning Gibbous on

Moon phase on 21 September 2051 Thursday is Waning Gibbous, 16 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2051 | September 2051

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

Waning Gibbous 98% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 98% 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 20 September 2051 at 10:11.

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 ∠14° of ♈ Aries tropical zodiac sector.

Apparent angular diameter ∠1970"

Lunar disc appears visually 3% wider than solar disc. Moon and Sun apparent angular diameters are ∠1970" and ∠1911".

Harvest Moon before 1 day

Next Full Moon is the Hunter Moon of October 2051 after 28 days on 19 October 2051 at 19:13.

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 639 / 1592

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 639 of Meeus index or 1592 from Brown series.

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Synodic month length 29.68 days

Length of current 639 lunation is 29 days, 16 hours and 14 minutes. It is 1 hour and 58 minutes shorter than next lunation 640 length.

Lunation length longer than mean

Length of current synodic month is 3 hours and 29 minutes longer than the mean length of synodic month, but it is still 3 hours and 33 minutes shorter, compared to 21st century longest.

Lunar orbit position on

True anomaly ∠137°

This New Moon true anomaly is ∠137°. At beginning of next synodic month true anomaly will be ∠163.9°. The length of upcoming synodic months will keep increasing since the true anomaly gets closer to the value of New Moon at point of apogee (∠180°).

Moon in perigee

Moon is reaching point of perigee on this date at 12:20, this is 12 days after last apogee on 9 September 2051 at 04:18 in ♏ Scorpio. Lunar orbit is starting to get wider, while the Moon is moving outward the Earth for 15 days ahead, until it will get to the point of next apogee on 6 October 2051 at 15:34 in ♎ Libra.

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Distance to Moon 358 920 km

This perigee Moon is 358 920 km (223 023 mi) away from Earth. It is 3 588 km closer than the mean perigee distance, but it is still 11 436 km farther than the closest perigee of 21st century.

Moon before descending node

12 days after its ascending node on 8 September 2051 at 15:18 in ♎ Libra, the Moon is following the northern part of its orbit for the next day, until it will cross the ecliptic from North to South in descending node on 22 September 2051 at 03:59 in ♈ Aries.

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Draconic month

12 days after beginning of current draconic month in ♎ Libra, 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 13 September 2051 at 15:30 in ♐ Sagittarius, when Moon has reached southern declination of ∠-18.758°. Next 4 days the lunar orbit moves northward to face North declination of ∠18.704° in the next northern standstill on 26 September 2051 at 07:36 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 13 days

After 13 days on 4 October 2051 at 20:47 in ♎ Libra, the Moon will be in New Moon geocentric conjunction with the Sun and this alignment forms next Sun-Moon-Earth syzygy.

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