January Moon & Planet data for 2018


The follwing table lists various solar system object events during January. A list of astronomical terms used in may be found after the table.

January 1 Moon at perigee
January 1 Moon northern most declination (20.1 degrees)
January 2 Moon full
January 2 Mercury greatest elong W(23)
January 2 Uranus stationary
January 3 Earth at perihelion
January 5 Regulus 0.9 degrees south of the Moon Occn
January 7 Mars 0.2 degrees south of Jupiter
January 8 Moon last quarter
January 9 Venus superior conjunction
January 9 Pluto at conjunction
January 9 Venus 1.2 degrees south of Pluto
January 11 Jupiter 4.1 degrees south of the Moon
January 11 Mars 4.4 degrees south of the Moon
January 13 Mercury 0.6 degrees south of Saturn
January 15 Saturn 2.6 degrees south of the Moon
January 15 Moon at apogee
January 15 Mercury 3.3 degrees south of the Moon
January 15 Moon southern most declination (-20.0 degrees)
January 16 Pluto 1.8 degrees south of the Moon
January 17 Moon new
January 17 Venus 2.4 degrees south of the Moon
January 20 Neptune 1.5 degrees north of the Moon
January 24 Uranus 4.4 degrees north of the Moon
January 24 Mercury 1.5 degrees south of Pluto
January 24 Moon first quarter
January 27 Aldebaran 0.7 degrees south of the Moon Occn
January 29 Moon northern most declination (20.1 degrees)
January 30 Moon at perigee
January 31 Moon full Eclipse
  • apogee: Furtherest point in the orbit of a body orbiting the Earth
  • conjunction: Two astronomical objects are 'lined up' (have the same right ascension) when viewed from Earth. If only one object is mentioned the Sun is generally the other object.
  • declination: 'Latitude' for celestial objects. The distance in degress above (north) or below (south) the celestial equator.
  • perigee: Nearest point in the orbit of a body orbiting the Earth
  • perihelion: Nearest point in the orbit of a body orbiting the Sun
  • superior conjunction: Conjunction where the Sun is between the Earth another solar system object