Tucson, UNITED STATES: Stars appear to rotate around Polaris, the north star (C, top), in this time exposure, 26 January, 2006, above a view of the 4-meter telescope dome at Kitt Peak National Observatory near Tucson, Arizona. The image is composed of 114 30-second exposures of the night sky combined to make the equivalent of a nearly one hour exposure in which the earth’s rotation causes the stars to appear to move across the night sky. The orange glow on the horizon is from the city of Phoenix, 100 miles (160 Km) away. AFP PHOTO / Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)AFP/Getty Images
Tuesday, September 1 – End of the Perseid meteor shower. Asteroid (NEO) 2020 QG5 makes its closest approach to Earth (7.76379 lunar distances) at 5:30 a.m. Asteroid (NEO) 2011 ES42011 makes it closest approach to Earth (0.31550 lunar distances) at 2:12 p.m.
Wednesday, September 2 – The Full Corn Moon will peak at 1:22 a.m. EDT. The full moon of September usually is also known as the Harvest Moon, which designates the full moon closest on the calendar to the autumnal equinox, but that is the October 1 full moon this year.
Saturday, September 5—Mars will appear as a bright yellow-orange “star” just above the waning gibbous Moon late this evening in the eastern sky.
Sunday, September 6—Venus dominates the early morning sky about a third of the way up in the eastern sky.
Monday, September 7 – End of Aurigid meteor shower. End of the August Gamma Cepheid meteor shower.
Tuesday, September 8 – Start of the chi Cygnid meteor shower. Asteroid (NEO) 2020 PG6 makes it closest approach to Earth ( 5.89459 lunar distances) at 8:43 a.m.
Thursday, September 10 — Last Quarter Moon at 5:26 a.m. In this phase, the Moon appears as a half Moon due to the direct sunlight, the illuminated part is decreasing toward the new Moon phase. End of the Daytime zeta Cancrid meteor shower.
Friday, September 11 – Neptune will make its closest approach to Earth. It will be at its brightest but will appear as only a tiny blue dot through all but the most powerful telescopes.
Saturday, September 12 – Asteroid (NEO) 2012 RM15 makes it closest approach to Earth (14.83993 lunar distances) at 12:56 a.m.
Monday, September 14 — The waning crescent Moon will be just to the left of a very bright Venus just before sunrise in the eastern sky.
Thursday, September 17 — The New Moon will not be illuminated by direct sunlight and will be invisible to the naked eye. This will be the best time this month for observing faint and distant objects in the night sky. End of the chi Cygnid meteor shower. Asteroid (NEO) 2014 QJ33 makes its closest approach to Earth (6.66676 lunar distances) at 11:50 p.m.
Sunday, September 20 – Asteroid (NEO) 2017 SL16 makes its closest approach to Earth (8.83987 lunar distances) at 6:56 a.m.
Tuesday, September 22 – Mercury will pass closely to Spica, the brightest star in the constellation Virgo in the western sky.
Thursday, September 24 — A bright Jupiter will reach its highest point in the southern sky at evening twilight.
Friday, September 25 – Saturn shines just above the waxing gibbous Moon and just left of Jupiter in the southern sky just after dusk.
Wednesday, September 30 — Venus appears just to the upper right of Regulus in in the constellation Leo. Start of the epsilon Geminid meteor shower.
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