First Quarter on

Moon phase on 21 September 2099 Monday is First Quarter, 7 days young Moon is in Sagittarius.

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Moon phase for

Lunar calendar 2099 | September 2099

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

First Quarter 51% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 51% and growing larger. The 7 days young Moon is in ♐ Sagittarius.

* The exact date and time of this First Quarter phase is on 21 September 2099 at 09:48 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 is entering ♐ Sagittarius

Moon is passing first ∠0° of ♐ Sagittarius tropical zodiac sector.

Apparent angular diameter ∠1872"

Lunar disc appears visually 2.1% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1872" and ∠1912".

Harvest Moon after 7 days

Next Full Moon is the Harvest Moon of September 2099 after 7 days on 29 September 2099 at 10:45.

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 1233 / 2186

The Moon is 7 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 1233 of Meeus index or 2186 from Brown series.

PreviousCurrent lunationNext

Synodic month length 29.36 days

Length of current 1233 lunation is 29 days, 8 hours and 42 minutes. It is 1 hour and 15 minutes shorter than next lunation 1234 length.

Lunation length shorter than mean

Length of current synodic month is 4 hours and 2 minutes shorter than the mean length of synodic month, but it is still 2 hours and 7 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠355.4°

This New Moon true anomaly is ∠355.4°. At beginning of next synodic month true anomaly will be ∠10.7°. 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 after perigee

6 days after point of perigee on 14 September 2099 at 23:26 in ♍ Virgo. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 7 days, until it get to the point of next apogee on 28 September 2099 at 22:34 in ♓ Pisces.

Previous perigeeNext apogee

Distance to Moon 382 963 km

Moon is 382 963 km (237 962 mi) away from Earth on this date. Moon moves farther next 7 days until apogee, when Earth-Moon distance will reach 406 272 km (252 446 mi).

Moon after descending node

6 days after its descending node on 14 September 2099 at 23:44 in ♍ Virgo, the Moon is following the southern part of its orbit for the next 7 days, until it will cross the ecliptic from South to North in ascending node on 28 September 2099 at 14:28 in ♓ Pisces.

Previous nodeNext node

Draconic month

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

PreviousCurrent draconic monthNext

Moon in southern standstill

At 11:17 on this date the Moon is meeting its South standstill point, when it will reach southern declination of ∠-28.686°. This is the year's southernmost lunar standstill of 2099. Next 14 days the lunar orbit will move in opposite northward direction to face North declination of ∠28.657° in its northern standstill point on 6 October 2099 at 05:56 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 7 days

After 7 days on 29 September 2099 at 10:45 in ♈ Aries, the Moon will be in Full Moon geocentric opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy.

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