Waning Gibbous on

Moon phase on 21 September 2100 Tuesday is Waning Gibbous, 17 days old Moon is in Taurus.

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Moon phase for

Lunar calendar 2100 | September 2100

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 17 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

3 days after Full Moon

Previous main lunar phase is the Full Moon before 3 days on 18 September 2100 at 11:32.

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 is entering ♉ Taurus

Moon is passing first ∠2° of ♉ Taurus tropical zodiac sector.

Apparent angular diameter ∠1769"

Lunar disc appears visually 7.7% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1769" and ∠1912".

Harvest Moon before 3 days

Next Full Moon is the Hunter Moon of October 2100 after 26 days on 18 October 2100 at 04:06.

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 1245 / 2198

The 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 1245 of Meeus index or 2198 from Brown series.

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Synodic month length 29.38 days

Length of current 1245 lunation is 29 days, 9 hours and 13 minutes. It is 1 minute longer than next lunation 1246 length.

Lunation length shorter than mean

Length of current synodic month is 3 hours and 31 minutes shorter than the mean length of synodic month, but it is still 2 hours and 38 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠320.8°

This lunation true anomaly is ∠320.8°. At the beginning of next synodic month true anomaly will be ∠340.4°. 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 before apogee

14 days after point of perigee on 6 September 2100 at 19:23 in ♎ Libra. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next day, until it get to the point of next apogee on 22 September 2100 at 16:20 in ♉ Taurus.

Previous perigeeNext apogee

Distance to Moon 405 174 km

Moon is 405 174 km (251 763 mi) away from Earth on this date. Moon moves farther next day until apogee, when Earth-Moon distance will reach 405 610 km (252 034 mi).

Moon after ascending node

4 days after its ascending node on 17 September 2100 at 01:56 in ♓ Pisces, the Moon is following the northern part of its orbit for the next 10 days, until it will cross the ecliptic from North to South in descending node on 1 October 2100 at 12:43 in ♍ Virgo.

Previous nodeNext node

Draconic month

4 days after beginning of current draconic month in ♓ Pisces, the Moon is moving from the beginning to the first part of it.

PreviousCurrent draconic monthNext

Moon before northern standstill

9 days after previous South standstill on 11 September 2100 at 14:42 in ♐ Sagittarius, when Moon has reached southern declination of ∠-28.345°. Next 4 days the lunar orbit moves northward to face North declination of ∠28.300° in the next northern standstill on 26 September 2100 at 01:39 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 12 days

After 12 days on 3 October 2100 at 18:03 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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