Waning Gibbous on

Moon phase on 4 January 2018 Thursday is Waning Gibbous, 17 days old Moon is in Leo.

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Moon phase for

Lunar calendar 2018 | January 2018

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 ♌ Leo.

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Moon phases for next 7 days

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Moon phase and lunation details

2 days after Full Moon

Previous main lunar phase is the Full Moon before 2 days on 2 January 2018 at 02:24.

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 ♌ Leo

Moon is passing about ∠18° of ♌ Leo tropical zodiac sector.

Apparent angular diameter ∠1948"

Lunar disc appears visually 0.2% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1948" and ∠1951".

Wolf Moon before 2 days

Next Full Moon is the Wolf Moon of January 2018 after 27 days on 31 January 2018 at 13:27.

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 222 / 1175

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 222 of Meeus index or 1175 from Brown series.

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Synodic month length 29.82 days

The length of the lunation is 29 days, 19 hours and 47 minutes. This is the year's longest synodic month of 2018. It is 59 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 7 hours and 3 minutes longer than the mean synodic month length and it is the longest synodic month length of 21st century.

Lunar orbit position on

True anomaly ∠173.3°

At the beginning of the lunation cycle the true anomaly is ∠173.3°. At the beginning of next synodic month the true anomaly is going to be ∠198.1°.

Moon after perigee

2 days after point of perigee on 1 January 2018 at 21:54 in ♋ Cancer. The lunar orbit is getting widen, while the Moon is moving away from the Earth. It will keep this direction over the next 10 days, until the Moon reaches the point of next apogee on 15 January 2018 at 02:10 in ♑ Capricorn.

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Distance to Moon 367 927 km

The Moon is 367 927 km (228 619 mi) away from Earth and getting further over the next 10 days until the point apogee when Earth-Moon distance is going to be 406 461 km (252 563 mi).

Moon in ascending node

Moon is in ascending node in ♌ Leo at 07:48 crossing the ecliptic from South to North to meet descending node 14 days later on 18 January 2018 at 14:28 in ♒ Aquarius.

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New draconic month

At 07:48 the Moon completes the previous draconic month and enters the new one.

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Moon after northern standstill

2 days since the previous standstill on 2 January 2018 at 00:01 in ♋ Cancer when the Moon has reached North declination of ∠20.055°, the lunar orbit is extending southward over the next 11 days to face maximum declination of ∠-20.048° at the point of next southern standstill on 15 January 2018 at 16:28 in ♑ Capricorn.

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Syzygy in 12 days

In 12 days on 17 January 2018 at 02:17 in ♑ Capricorn 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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