First Quarter on

Moon phase on 15 September 2010 Wednesday is First Quarter, 7 days young Moon is in Sagittarius.

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Moon phase for

Lunar calendar 2010 | September 2010

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

First Quarter 53% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 53% and growing larger. The Moon is in ♐ Sagittarius.

* The exact date and time of this First Quarter phase is on 15 September 2010 at 05:50 UTC.

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Moon phases for next 7 days

7 days ago | 7 days after

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 leaving the last ∠4° of ♐ Sagittarius tropical zodiac sector and will enter ♑ Capricorn later.

Upcoming main Moon phases

Harvest Moon after 7 days

Next Full Moon is the Harvest Moon of September after 7 days on 23 September 2010 at 09:17.

Apparent angular diameter ∠1840"

Lunar disc appears visually 3.63% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1840" and ∠1908".

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 132 / 1085

Moon is 7 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 132 of Meeus index or 1085 from Brown series.

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Synodic month length 29.34 days

Length of current 132 lunation is 29 days, 8 hours and 15 minutes. It is 1 hour and 52 minutes shorter than next lunation 133.

Lunation length shorter than mean

Length of current synodic month is 4 hours and 29 minutes shorter than the mean length of synodic month, but it is still 1 hour and 40 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠4.6°

This lunation true anomaly is ∠4.6°. At the beginning of next synodic month true anomaly is ∠20.4°. The length of upcoming synodic months increases since the true anomaly gets closer to the value of New Moon at point of apogee (∠180°).

Moon before apogee

7 days after point of perigee on 8 September 2010 at 04:00, lunar orbit gets wider while the Moon moves outward the Earth. It keeps this direction for next 5 days until it gets to the point of apogee on 21 September 2010 at 08:03.

Distance to Moon 389 493 km

Moon is 389 493 km (242 020 mi) away from Earth on this date. At previous perigee point before 7 days, distance is 357 193 km (221 949 mi). Moon moves farther next 5 days until apogee, when Earth-Moon distance reaches 406 169 km (252 382 mi).

Moon before ascending node

11 days after its descending node on 4 September 2010 at 00:16, the Moon follows the southern part of its orbit for the next 1 day untill it crosses the ecliptic from South to North in ascending node on 16 September 2010 at 13:56.

Draconic month

25 days after its beginning, the Moon is moving from the second to the final part of current draconic month.

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Moon after southern standstill

1 day after previous South standstill on 14 September 2010 at 23:47, when Moon reaches southern declination of ∠-24.710°, lunar orbit moves northward for the next 14 days to face North declination of ∠24.555° in the next northern standstill on 29 September 2010 at 17:37.

Syzygy in 7 days

After 7 days the Moon is in Full Moon opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy on 23 September 2010 at 09:17.

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