Waning Gibbous on

Moon phase on 17 August 2011 Wednesday is Waning Gibbous, 18 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2011 | August 2011

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

Waning Gibbous 87% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 87% and getting smaller. The 18 days old Moon is in ♈ Aries.

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Moon phases for next 7 days

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Moon phase and lunation details

3 days after Full Moon

Previous main lunar phase is the Full Moon before 3 days on 13 August 2011 at 18:58.

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 ♈ Aries

Moon is passing about ∠6° of ♈ Aries tropical zodiac sector.

Apparent angular diameter ∠1769"

Lunar disc appears visually 6.9% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1769" and ∠1895".

Sturgeon Moon before 3 days

Next Full Moon is the Harvest Moon of September 2011 after 25 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 143 / 1096

The Moon is 18 days old. Earth's natural satellite is moving from the middle to the last part of current synodic month. This is lunation 143 of Meeus index or 1096 from Brown series.

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Synodic month length 29.35 days

The length of the lunation is 29 days, 8 hours and 24 minutes. It is 19 minutes longer 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 20 minutes shorter than the mean synodic month length. It is 1 hour and 49 minutes longer compared to 21st century's shortest synodic month length.

Lunar orbit position on

True anomaly ∠312.1°

At the beginning of the lunation cycle the true anomaly is ∠312.1°. At the beginning of next synodic month the true anomaly is going to be ∠333.4°.

Moon before perigee

14 days after point of perigee on 2 August 2011 at 20:59 in ♍ Virgo. The lunar orbit is getting widen, while the Moon is moving away from the Earth. It will keep this direction over the next day, until the Moon reaches the point of next apogee on 18 August 2011 at 16:23 in ♈ Aries.

Previous perigeeNext apogee

Distance to Moon 405 098 km

The Moon is 405 098 km (251 716 mi) away from Earth and getting further over the next day until the point apogee when Earth-Moon distance is going to be 405 161 km (251 755 mi).

Moon before descending node

8 days after ascending node on 9 August 2011 at 06:35 in ♐ Sagittarius. The Moon is located north of the ecliptic over the following 6 days, until the lunar orbit crosses from North to South in descending node on 23 August 2011 at 17:23 in ♊ Gemini.

Previous nodeNext node

Draconic month

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

PreviousCurrent draconic monthNext

Moon before northern standstill

8 days since the previous standstill on 8 August 2011 at 23:15 in ♐ Sagittarius when the Moon has reached South declination of ∠-23.270°, the lunar orbit is extending northward over the next 6 days to face maximum declination of ∠23.149° at the point of next northern standstill on 23 August 2011 at 12:17 in ♊ Gemini.

Previous standstillNext standstill

Syzygy in 11 days

In 11 days on 29 August 2011 at 03:04 in ♍ Virgo 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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