Waning Gibbous on

Moon phase on 9 September 2017 Saturday is Waning Gibbous, 18 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2017 | September 2017

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

Waning Gibbous 88% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 88% 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 6 September 2017 at 07:03.

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 leaving the last ∠3° of ♈ Aries tropical zodiac sector and will enter ♉ Taurus later.

Apparent angular diameter ∠1928"

Lunar disc appears visually 1.2% wider than solar disc. Moon and Sun apparent angular diameters are ∠1928" and ∠1905".

Harvest Moon before 3 days

Next Full Moon is the Hunter Moon of October 2017 after 26 days on 5 October 2017 at 18:40.

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 218 / 1171

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 218 of Meeus index or 1171 from Brown series.

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Synodic month length 29.46 days

Length of current 218 lunation is 29 days, 11 hours and 1 minute. It is 2 hours and 42 minutes shorter than next lunation 219 length.

Lunation length shorter than mean

Length of current synodic month is 1 hour and 44 minutes shorter than the mean length of synodic month, but it is still 4 hours and 25 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠49.5°

This New Moon true anomaly is ∠49.5°. At beginning of next synodic month true anomaly will be ∠79°. The length of upcoming synodic months will keep increasing since the true anomaly gets closer to the value of New Moon at point of apogee (∠180°).

Moon before perigee

10 days after point of apogee on 30 August 2017 at 11:25 in ♐ Sagittarius. The lunar orbit is getting closer, while the Moon is moving inward the Earth. It will keep this direction for the next 4 days, until it get to the point of next perigee on 13 September 2017 at 16:04 in ♊ Gemini.

Previous apogeeNext perigee

Distance to Moon 371 734 km

Moon is 371 734 km (230 985 mi) away from Earth on this date. Moon moves closer next 4 days until perigee, when Earth-Moon distance will reach 369 856 km (229 818 mi).

Moon after descending node

4 days after its descending node on 4 September 2017 at 18:41 in ♒ Aquarius, the Moon is following the southern part of its orbit for the next 8 days, until it will cross the ecliptic from South to North in ascending node on 17 September 2017 at 18:28 in ♌ Leo.

Previous nodeNext node

Draconic month

19 days after beginning of current draconic month in ♌ Leo, the Moon is moving from the second to the final part of it.

PreviousCurrent draconic monthNext

Moon before northern standstill

8 days after previous South standstill on 1 September 2017 at 02:03 in ♑ Capricorn, when Moon has reached southern declination of ∠-19.393°. Next 5 days the lunar orbit moves northward to face North declination of ∠19.438° in the next northern standstill on 14 September 2017 at 13:00 in ♋ Cancer.

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Syzygy in 10 days

After 10 days on 20 September 2017 at 05:30 in ♍ Virgo, 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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