First Quarter on

Moon phase on 22 September 2012 Saturday is First Quarter, 7 days young Moon is in Sagittarius.

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Moon phase for

Lunar calendar 2012 | September 2012

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

First Quarter 46% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 46% and growing larger. The 7 days young Moon is in ♐ Sagittarius.

* The exact date and time of this First Quarter phase is on 22 September 2012 at 19:41 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 ♐ Sagittarius

Moon is leaving the last ∠4° of ♐ Sagittarius tropical zodiac sector and will enter ♑ Capricorn later.

Apparent angular diameter ∠1964"

Lunar disc appears visually 2.7% wider than solar disc. Moon and Sun apparent angular diameters are ∠1964" and ∠1912".

Harvest Moon after 7 days

Next Full Moon is the Harvest Moon of September 2012 after 7 days on 30 September 2012 at 03:19.

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 157 / 1110

The Moon is 7 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 157 of Meeus index or 1110 from Brown series.

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Synodic month length 29.41 days

Length of current 157 lunation is 29 days, 9 hours and 52 minutes. This is the year's shortest synodic month of 2012. It is 13 minutes shorter than next lunation 158 length.

Lunation length shorter than mean

Length of current synodic month is 2 hours and 52 minutes shorter than the mean length of synodic month, but it is still 3 hours and 17 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠312.9°

This lunation true anomaly is ∠312.9°. At the beginning of next synodic month true anomaly will be ∠334.3°. 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 after perigee

3 days after point of perigee on 19 September 2012 at 02:52 in ♏ Scorpio. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 12 days, until it get to the point of next apogee on 5 October 2012 at 00:43 in ♊ Gemini.

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Distance to Moon 365 041 km

Moon is 365 041 km (226 826 mi) away from Earth on this date. Moon moves farther next 12 days until apogee, when Earth-Moon distance will reach 405 162 km (251 756 mi).

Moon after ascending node

1 day after its ascending node on 20 September 2012 at 12:54 in ♏ Scorpio, the Moon is following the northern part of its orbit for the next 11 days, until it will cross the ecliptic from North to South in descending node on 4 October 2012 at 05:15 in ♉ Taurus.

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Draconic month

1 day after beginning of current draconic month in ♏ Scorpio, the Moon is moving from the beginning to the first part of it.

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Moon in southern standstill

At 00:11 on this date the Moon is meeting its South standstill point, when it will reach southern declination of ∠-21.135°. Next 13 days the lunar orbit will move in opposite northward direction to face North declination of ∠21.024° in its northern standstill point on 6 October 2012 at 01:40 in ♊ Gemini.

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Syzygy in 7 days

After 7 days on 30 September 2012 at 03:19 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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