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Amateur Telescope Makers of Boston

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September Sky

Observing Committee
Thu 5
Neptune at opposition in Aquarius.
Wed 6 Full (Harvest) Moon at 3:03am EDT.
Sun 10 Mercury and Regulus are less than 1 degree apart. Look very low in the East 40 minutes before sunrise.
Tue 12 Mercury at Greatest Western (Morning) Elongation.
Aldebaran occulted by the Moon. Event run from 8:59 to 10:08am EDT.
Wed 13 Last Quarter Moon at 2:25am EDT.
Sat 16 Mercury and Mars are a fraction of a degree apart. Look very low in the East 40 minutes before sunrise.
Sun 17 Look low in the East 40 minutes before sunrise to see an alignment of (horizon upward) Mercury, Mars, Regulus, Venus, and a thin waning crescent Moon.
Mon 18 A very thin waning crescent Moon has moved between Mercury/Mars and Regulus/Venus
Wed 20 New Moon at 1:30am EDT
Venus and Regulus are less than 1 degree apart. Look East an hour before sunrise.
Fri 22 Autumnal Equinox at 4:02pm EDT
Tue 26 Saturn appears below a wide waxing crescent Moon tonight.
Wed 27 First Quarter Moon at 10:54pm EDT.

Mercury makes a very favorable morning appearance, reaching Greatest Western Elongation on the 12th. On the mornings of the 14th through 18th look for a close conjunction with Mars. 

Venus shines brightly in the morning sky, rising 2 hours before the sun and moving from Cancer into Leo. Look for a close pass-by of Regulus on the mornings of the 19th and 20th.

Mars reappears in the morning sky around mid-month after a July 27 conjunction with the sun, Look for an extremely close pair-up with Mercury on the 16th.

Jupiter, in Virgo, is rapidly fading from view in the WSW evening sky.

Saturn shines in Ophiuchus, high above the West horizon after sunset.