Waning Gibbous on

Moon phase on 31 May 2021 Monday is Waning Gibbous, 20 days old Moon is in Aquarius.

Share this page: twitter facebook linkedin

Moon phase for

Lunar calendar 2021 | May 2021

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

Waning Gibbous 69% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 69% and getting smaller. The 20 days old Moon is in ♒ Aquarius.

Previous date | Moon Today | Next date

Moon phases for next 7 days

7 days ago | 7 days after

Moon phase and lunation details

5 days after Full Moon

Previous main lunar phase is the Full Moon before 5 days on 26 May 2021 at 11:14.

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 ♒ Aquarius

Moon is passing about ∠18° of ♒ Aquarius tropical zodiac sector.

Apparent angular diameter ∠1883"

Lunar disc appears visually 0.5% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1883" and ∠1892".

Flower Moon before 5 days

Next Full Moon is the Strawberry Moon of June 2021 after 24 days on 24 June 2021 at 18:40.

Upcoming main Moon phases

  • Last Quarter in Pisces ♓ on 2 June 2021 at 07:24
  • New Moon in Gemini ♊ on 10 June 2021 at 10:53
  • First Quarter in Virgo ♍ on 18 June 2021 at 03:54
  • Full Moon in Sagittarius ♐ on 24 June 2021 at 18:40

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 264 / 1217

The Moon is 20 days old. Earth's natural satellite is moving from the middle to the last part of current synodic month. This is lunation 264 of Meeus index or 1217 from Brown series.

PreviousCurrent lunationNext

Synodic month length 29.66 days

The length of the lunation is 29 days, 15 hours and 53 minutes. It is 1 hour and 29 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 3 hours and 9 minutes longer than the mean synodic month length. It is 3 hours and 54 minutes shorter compared to 21st century's longest synodic month length.

Lunar orbit position on

True anomaly ∠178.9°

At the beginning of the lunation cycle the true anomaly is ∠178.9°. At the beginning of next synodic month the true anomaly is going to be ∠202.3°.

Moon after perigee

5 days after point of perigee on 26 May 2021 at 01:52 in ♏ Scorpio. The lunar orbit is getting widen, while the Moon is moving away from the Earth. It will keep this direction over the next 7 days, until the Moon reaches the point of next apogee on 8 June 2021 at 02:27 in ♉ Taurus.

Previous perigeeNext apogee

Distance to Moon 380 690 km

The Moon is 380 690 km (236 550 mi) away from Earth and getting further over the next 7 days until the point apogee when Earth-Moon distance is going to be 406 230 km (252 420 mi).

Moon after descending node

4 days after descending node on 26 May 2021 at 19:38 in ♐ Sagittarius. The Moon is located south of the ecliptic over the following 9 days, until the lunar orbit crosses from South to North in ascending node on 9 June 2021 at 16:42 in ♊ Gemini.

Previous nodeNext node

Draconic month

18 days since the beginning of current draconic month in ♊ Gemini, the Moon is navigating from the second to the final part of the cycle.

PreviousCurrent draconic monthNext

Moon after southern standstill

2 days since the previous standstill on 28 May 2021 at 19:21 in ♑ Capricorn when the Moon has reached South declination of ∠-25.647°, the lunar orbit is extending northward over the next 11 days to face maximum declination of ∠25.640° at the point of next northern standstill on 12 June 2021 at 04:11 in ♋ Cancer.

Previous standstillNext standstill

Syzygy in 9 days

In 9 days on 10 June 2021 at 10:53 in ♊ Gemini 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.

Previous syzygyNext syzygy

Share this page: twitter facebook linkedin
Back to: Top of page