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Sky Calendar -- September 2010

1	Moon near the Pleiades (morning sky) at 0h UT. • Pleiades (star cluster) (Wikipedia)
1	Venus 1.0° SSW of Spica at 2h UT. Mags. -4.4 and +1.0.
1	Last Quarter Moon at 17:22 UT.
3	Mercury at inferior conjunction with the Sun at 12h UT. Mercury passes into the morning sky.
5	Moon near Beehive cluster M44 (morning sky) at 22h UT.
5	Mars 2.1° NNE of Spica at 22h UT. Mags. +1.5 and +1.0.
8	Moon at perigee (closest to Earth) at 4h UT (357,190 km; 33.1'). Perigee is only 6.5 hours before New Moon so high tides are expected.
8	New Moon at 10:30 UT. Start of lunation 1085. • Lunation Number (Wikipedia)
9	Moon near Saturn (19° from Sun, evening sky) at 18h UT. Mag. +1.0.
11	Moon near Spica (evening sky) at 0h UT.
11	Moon near Mars at 4h UT. Mag. +1.5.
11	Moon near Venus at 14h UT. Mag -4.5.
14	Moon near Antares (evening sky) at 5h UT.
15	First Quarter Moon at 5:50 UT.
18	Jupiter 0.8° SSE from Uranus (midnight sky) at 18h UT. Mags. -2.9 and +5.7.
19	Mercury at greatest elongation, 18° west from Sun (morning sky) at 17h UT. Mag. -0.4.
21	Moon at apogee (farthest from Earth) at 8h UT (distance 406,165 km; angular size 29.5').
21	Jupiter at opposition at 11h UT (mag. -2.9). Best time to observe the largest planet in the solar system.
21	Uranus at opposition at 17h UT (mag. +5.7).
23	September equinox at 3:13 UT. The time when the Sun reaches the point along the ecliptic where it crosses into the southern celestial hemisphere marking the start of autumn in the Northern Hemisphere and spring in the Southern Hemisphere. • Equinox (Wikipedia)
23	Moon near Jupiter (midnight sky) at 4h UT. Mag. -2.9.
23	Full Moon at 9:17 UT. • Full Moon Names (Wikipedia)
27	Venus at its brightest at 15h UT. Mag. -4.6.
28	Moon near the Pleiades (morning sky) at 4h UT.
All times Universal Time (UT). USA Eastern Summer Time = UT - 4 hours.

Clear skies till next month!

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Sky Calendar References:

Astronomical Calendar 2010 (book) by Guy Ottewell
Starry Night Pro Plus v6.3 (software) by Imaginova
Sky & Telescope (magazine) by Sky Publishing
Astronomical Tables of the Sun, Moon and Planets (book) by Jean Meeus
Celestial Delights (book) by Francis Reddy and Greg Walz-Chojnacki

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