September

For terms in boldface, see Astronomical Terms.
DayPhenomenonHour
3Pallas, the second-largest asteroid, is at opposition.0000
4LAST QUARTER0300
4Mars is 6° south of the Moon.1400
7Venus appears to be motionless in the sky as it moves toward its greatest elongation west of the Sun from a position east of the Sun as viewed from Earth.1400
7Pluto appears to be motionless in the sky as it goes from retrograde to direct motion.2200
8Venus is 9° south of the Moon.1900
9Uranus is at opposition.1900
10Regulus, the brightest star in the constellation Leo, is 0° 2' south of the Moon. Occultation of Regulus by the Moon.0100
10Saturn is 0° 8' north of the Moon. Occultation of Saturn by the Moon.0400
11NEW MOON. Partial eclipse of the Sun.1300
13Mercury is 2° north of the Moon.1400
15The Moon is at apogee.2100
18Antares, the brightest star in the constellation Scorpius, is 0° 7' north of the Moon. Occultation of Antares by the Moon.0800
18Jupiter is 6° north of the Moon.1500
19FIRST QUARTER1700
21Ceres, the largest asteroid, appears to be motionless in the sky as it goes from direct motion to retrograde motion.0300
22Mercury is 0° 09' north of Spica, the brightest star in the constellation Virgo.0900
23Equinox.1000
23Neptune is 1° 4' north of the Moon.1800
23Venus is at its greatest illuminated extent.2300
25Uranus is 1° 9' south of the Moon.1700
26FULL MOON2000
28The Moon is at perigee.0200
29Mercury is at its greatest elongation, at 26° east of the Sun.1600