Waning Gibbous on

Moon phase on 21 July 2011 Thursday is Waning Gibbous, 20 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2011 | July 2011

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

Waning Gibbous 66% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 66% and getting smaller. The 20 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

6 days after Full Moon

Previous main lunar phase is the Full Moon before 6 days on 15 July 2011 at 06:40.

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 ∠10° of ♈ Aries tropical zodiac sector.

Apparent angular diameter ∠1768"

Lunar disc appears visually 6.6% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1768" and ∠1888".

Buck Moon before 6 days

Next Full Moon is the Sturgeon Moon of August 2011 after 23 days on 13 August 2011 at 18:58.

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 142 / 1095

The Moon is 20 days old. Earth's natural satellite is moving from the middle to the last part of current synodic month. This is lunation 142 of Meeus index or 1095 from Brown series.

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Synodic month length 29.41 days

Length of current 142 lunation is 29 days, 9 hours and 46 minutes. It is 1 hour and 22 minutes longer than next lunation 143 length.

Lunation length shorter than mean

Length of current synodic month is 2 hours and 58 minutes shorter than the mean length of synodic month, but it is still 3 hours and 11 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠283.1°

This lunation true anomaly is ∠283.1°. At the beginning of next synodic month true anomaly will be ∠312.1°. 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 in apogee

Moon is reaching point of apogee on this date at 22:46, this is 14 days after last perigee on 7 July 2011 at 14:04 in ♍ Virgo. Lunar orbit is starting to get closer, while the Moon is moving inward the Earth for 12 days ahead, until it will get to the point of next perigee on 2 August 2011 at 20:59 in ♍ Virgo.

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Distance to Moon 404 358 km

This apogee Moon is 404 358 km (251 256 mi) away from Earth. It is 1 050 km farther than the mean apogee distance, but it is still 2 351 km closer than the farthest apogee of 21st century.

Moon before descending node

8 days after its ascending node on 13 July 2011 at 02:27 in ♐ Sagittarius, the Moon is following the northern part of its orbit for the next 6 days, until it will cross the ecliptic from North to South in descending node on 27 July 2011 at 12:03 in ♊ Gemini.

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Draconic month

8 days after beginning of current draconic month in ♐ Sagittarius, the Moon is moving from the beginning to the first part of it.

PreviousCurrent draconic monthNext

Moon before northern standstill

8 days after previous South standstill on 12 July 2011 at 16:51 in ♐ Sagittarius, when Moon has reached southern declination of ∠-23.383°. Next 5 days the lunar orbit moves northward to face North declination of ∠23.333° in the next northern standstill on 27 July 2011 at 03:02 in ♊ Gemini.

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Syzygy in 9 days

After 9 days on 30 July 2011 at 18:40 in ♌ Leo, the Moon will be in New Moon geocentric conjunction with the Sun and this alignment forms next Sun-Moon-Earth syzygy.

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