First Quarter on

Moon phase on 18 January 2013 Friday is First Quarter, 7 days young Moon is in Aries.

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Moon phase details for

Lunar calendar 2013 | January 2013

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

First Quarter 45% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 45% and growing larger.

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Moonrise and moonset

Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.

Apparent angular diameter ∠1806"

Lunar disc appears visually 7.66% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1806" and ∠1950".

Wolf Moon after 8 days

Next Full Moon is the Wolf Moon of January after 8 days on 27 January 2013 at 04:38.

Moon in Aries

Moon is passing about ∠23° of Aries tropical zodiac sector.

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.

Upcoming Moon phases

Synodic month 1114 details

Lunation 161 / 1114

Moon is 7 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 161 of Meeus index or 1114 from Brown series.

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Synodic month length 29.48 days

Length of current 161 lunation is 29 days, 11 hours and 36 minutes. It is 55 minutes shorter than next lunation 162.

Lunation length shorter than mean

Length of current synodic month is 1 hour and 8 minutes shorter than the mean length of synodic month, but it is still 5 hours and 1 minute longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠23.3°

This lunation true anomaly is ∠23.3°. At the beginning of next synodic month true anomaly is ∠44.2°. 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

8 days after point of perigee on 10 January 2013 at 10:26, lunar orbit gets wider while the Moon moves outward the Earth. It keeps this direction for next 3 days until it gets to the point of apogee on 22 January 2013 at 10:52.

Distance to Moon 396 816 km

Moon is 396 816 km (246 570 mi) away from Earth on this date. At previous perigee point before 8 days, distance is 360 048 km (223 723 mi). Moon moves farther next 3 days until apogee, when Earth-Moon distance reaches 405 313 km (251 850 mi).

Moon before descending node

10 days after its ascending node on 7 January 2013 at 23:50, the Moon follows the northern part of its orbit for the next 2 days untill it crosses the ecliptic from North to South in descending node on 21 January 2013 at 01:19.

Draconic month

10 days after its beginning, the Moon is moving from the beginning to the first part of current draconic month.

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Moon before northern standstill

8 days after previous South standstill on 9 January 2013 at 15:22, when Moon reaches southern declination of ∠-20.879°, lunar orbit moves northward for the next 4 days to face North declination of ∠20.816° in the next northern standstill on 23 January 2013 at 05:12.

Syzygy in 8 days

After 8 days the Moon is in Full Moon opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy on 27 January 2013 at 04:38.

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