First Quarter on

Moon phase on 5 September 2011 Monday is First Quarter, 8 days young Moon is in Sagittarius.

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Moon phase for

Lunar calendar 2011 | September 2011

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

First Quarter 58% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 58% and growing larger. The 8 days young Moon is in ♐ Sagittarius.

* The exact date and time of this First Quarter phase is on 4 September 2011 at 17:39 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 passing about ∠22° of ♐ Sagittarius tropical zodiac sector.

Apparent angular diameter ∠1915"

Lunar disc appears visually 0.6% wider than solar disc. Moon and Sun apparent angular diameters are ∠1915" and ∠1903".

Harvest Moon after 6 days

Next Full Moon is the Harvest Moon of September 2011 after 6 days on 12 September 2011 at 09:27.

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 144 / 1097

The Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 144 of Meeus index or 1097 from Brown series.

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Synodic month length 29.34 days

Length of current 144 lunation is 29 days, 8 hours and 5 minutes. This is the year's shortest synodic month of 2011. It is 42 minutes shorter than next lunation 145 length.

Lunation length shorter than mean

Length of current synodic month is 4 hours and 39 minutes shorter than the mean length of synodic month, but it is still 1 hour and 30 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠333.4°

This lunation true anomaly is ∠333.4°. At the beginning of next synodic month true anomaly will be ∠350.1°. 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

5 days after point of perigee on 30 August 2011 at 17:35 in ♍ Virgo. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 9 days, until it get to the point of next apogee on 15 September 2011 at 06:23 in ♈ Aries.

Previous perigeeNext apogee

Distance to Moon 374 236 km

Moon is 374 236 km (232 539 mi) away from Earth on this date. Moon moves farther next 9 days until apogee, when Earth-Moon distance will reach 406 068 km (252 319 mi).

Moon in ascending node

Moon is in ascending node in ♐ Sagittarius at 07:36 on this date, it crosses the ecliptic from South to North. Moon will follow the northern part of its orbit for the next 14 days to meet descending node on 19 September 2011 at 19:38 in ♊ Gemini.

Previous nodeNext node

New draconic month

At 07:36 on this date the Moon is completing its previous draconic month and is entering the new one.


Moon in southern standstill

At 05:01 on this date the Moon is meeting its South standstill point, when it will reach southern declination of ∠-23.047°. Next 14 days the lunar orbit will move in opposite northward direction to face North declination of ∠22.890° in its northern standstill point on 19 September 2011 at 20:05 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 6 days

After 6 days on 12 September 2011 at 09:27 in ♓ Pisces, 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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