Waning Gibbous on

Moon phase on 17 September 2011 Saturday is Waning Gibbous, 19 days old Moon is in Taurus.

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Moon phase for

Lunar calendar 2011 | September 2011

Waning Gibbous phase
Waning Gibbous phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

Waning Gibbous 78% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 78% and getting smaller. The 19 days old Moon is in ♉ Taurus.

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Moon phases for next 7 days

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Moon phase and lunation details

5 days after Full Moon

Previous main lunar phase is the Full Moon before 5 days on 12 September 2011 at 09:27.

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 ♉ Taurus

Moon is passing about ∠20° of ♉ Taurus tropical zodiac sector.

Apparent angular diameter ∠1781"

Lunar disc appears visually 6.9% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1781" and ∠1909".

Harvest Moon before 5 days

Next Full Moon is the Hunter Moon of October 2011 after 24 days on 12 October 2011 at 02:06.

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 19 days old. Earth's natural satellite is moving from the middle to the last 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

The length of the 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 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 shorter than mean

The length of the current synodic month is 4 hours and 39 minutes shorter than the mean synodic month length. It is 1 hour and 30 minutes longer compared to 21st century's shortest synodic month length.

Lunar orbit position on

True anomaly ∠333.4°

At the beginning of the lunation cycle the true anomaly is ∠333.4°. At the beginning of next synodic month the true anomaly is going to be ∠350.1°.

Moon after apogee

2 days after point of apogee on 15 September 2011 at 06:23 in ♈ Aries. The lunar orbit is getting narrow, while the Moon is moving towards the Earth. It will keep this direction over the next 10 days, until the Moon reaches the point of next perigee on 28 September 2011 at 01:01 in ♎ Libra.

Previous apogeeNext perigee

Distance to Moon 402 423 km

The Moon is 402 423 km (250 054 mi) away from Earth and getting closer over the next 10 days until the point perigee when Earth-Moon distance is going to be 357 556 km (222 175 mi).

Moon before descending node

12 days after ascending node on 5 September 2011 at 07:36 in ♐ Sagittarius. The Moon is located north of the ecliptic over the following 2 days, until the lunar orbit crosses from North to South in descending node on 19 September 2011 at 19:38 in ♊ Gemini.

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Draconic month

12 days since the beginning of current draconic month in ♐ Sagittarius, the Moon is navigating from the beginning to the first part of the cycle.

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Moon before northern standstill

12 days since the previous standstill on 5 September 2011 at 05:01 in ♐ Sagittarius when the Moon has reached South declination of ∠-23.047°, the lunar orbit is extending northward over the next 2 days to face maximum declination of ∠22.890° at the point of next northern standstill on 19 September 2011 at 20:05 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 9 days

In 9 days on 27 September 2011 at 11:09 in ♎ Libra 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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