September Moon & Planet data for 2017


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

September 1 Moon southern most declination (-19.4 degrees)
September 1 Pluto 2.5 degrees south of the Moon
September 3 Mercury 3.3 degrees south of Mars
September 4 Mercury stationary
September 5 Neptune at opposition
September 5 Mars 0.7 degrees north of Regulus
September 6 Neptune 0.7 degrees north of the Moon Occn
September 6 Moon full
September 9 Uranus 4.1 degrees north of the Moon
September 10 Mercury 0.7 degrees south of Regulus
September 11 Jupiter 3.1 degrees north of Spica
September 12 Aldebaran 0.5 degrees south of the Moon Occn
September 12 Mercury greatest elong W(18)
September 13 Moon last quarter
September 13 Moon at perigee
September 14 Moon northern most declination (19.4 degrees)
September 16 Mercury 0.0 degrees north of Mars
September 18 Venus 0.5 degrees north of the Moon Occn
September 18 Regulus 0.1 degrees south of the Moon Occn
September 18 Mars 0.1 degrees south of the Moon Occn
September 18 Mercury 0.0 degrees north of the Moon Occn
September 20 Venus 0.5 degrees north of Regulus
September 20 Moon new
September 22 Jupiter 3.5 degrees south of the Moon
September 22 Equinox
September 27 Saturn 3.5 degrees south of the Moon
September 27 Moon at apogee
September 28 Moon first quarter
September 28 Pluto stationary
September 28 Moon southern most declination (-19.5 degrees)
September 29 Pluto 2.5 degrees south of the Moon
  • apogee: Furtherest point in the orbit of a body orbiting the Earth
  • 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