First Quarter on

Moon phase on 21 January 2021 Thursday is First Quarter, 8 days young Moon is in Taurus.

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Moon phase for

Lunar calendar 2021 | January 2021

First Quarter phase
First Quarter phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

First Quarter 56% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 56% and growing larger. The 8 days young Moon is in ♉ Taurus.

* The exact date and time of this First Quarter phase is on 20 January 2021 at 21:02 UTC.

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Moon phases for next 7 days

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Moon phase and lunation details

Moonrise and moonset

Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.

Moon in ♉ Taurus

Moon is passing about ∠8° of ♉ Taurus tropical zodiac sector.

Apparent angular diameter ∠1768"

Lunar disc appears visually 9.8% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1768" and ∠1950".

Wolf Moon after 7 days

Next Full Moon is the Wolf Moon of January 2021 after 7 days on 28 January 2021 at 19:16.

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 260 / 1213

The Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 260 of Meeus index or 1213 from Brown series.

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Synodic month length 29.59 days

The length of the lunation is 29 days, 14 hours and 5 minutes. It is 1 hour and 10 minutes shorter than the next lunation's length. The lengths of the following synodic months are going to increasing with the true anomaly getting closer to the value it has at the point of New Moon at apogee (∠180°).

Lunation length longer than mean

The length of the current synodic month is 1 hour and 21 minutes longer than the mean synodic month length. It is 5 hours and 42 minutes shorter compared to 21st century's longest synodic month length.

Lunar orbit position on

True anomaly ∠53.8°

At the beginning of the lunation cycle the true anomaly is ∠53.8°. At the beginning of next synodic month the true anomaly is going to be ∠87°.

Moon at apogee

Moon is at apogee at 13:11. It is 11 days after previous perigee on 9 January 2021 at 15:39 in ♏ Scorpio. Lunar orbit is going to narrow while the Moon is moving towards the Earth over the next 13 days, until point of next perigee on 3 February 2021 at 19:33 in ♎ Libra.

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Distance to Moon 404 361 km

This apogee Moon is 404 361 km (251 258 mi) away from Earth. It is 1 047 km further than the mean apogee distance, but it is still 2 348 km closer than the farthest apogee of 21st century.

Moon before ascending node

10 days after descending node on 10 January 2021 at 20:15 in ♐ Sagittarius. The Moon is located south of the ecliptic over the following 3 days, until the lunar orbit crosses from South to North in ascending node on 24 January 2021 at 21:47 in ♊ Gemini.

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Draconic month

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

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Moon before northern standstill

9 days since the previous standstill on 12 January 2021 at 08:18 in ♑ Capricorn when the Moon has reached South declination of ∠-24.870°, the lunar orbit is extending northward over the next 5 days to face maximum declination of ∠24.898° at the point of next northern standstill on 26 January 2021 at 15:39 in ♋ Cancer.

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Syzygy in 7 days

In 7 days on 28 January 2021 at 19:16 in ♌ Leo the Moon is going to be in a Full Moon geocentric opposition with the Sun and thus forming the next Sun-Earth-Moon syzygy alignment.

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