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Sky Calendar -- July 2009

3	Earth at Aphelion (farthest from Sun) at 8h UT. The Sun-Earth distance is 1.01668 a.u. or about 152.1 million km. • Earth at Aphelion (SpaceWeather.com) • Photographic Size Comparison (Anthony Ayiomamitis)
4	Moon very near Antares at 9h UT (evening sky). Occultation visible from Japan, the Pacific, and Hawaii. • Occultation of Antares (IOTA)
5	Venus near Pleiades at 14h UT (morning sky). • The Pleiades (Wikipedia)
7	Full Moon at 9:21 UT. The full Moon of July is called the Thunder Moon or Hay Moon. • Full Moon Names (Wikipedia)
7	Penumbral Eclipse of the Moon from 8:33 to 10:44 UT, mid-eclipse at 9:39 UT. Too slight to detect visually. • Lunar Eclipses for Beginners (Mr Eclipse) • Penumbral Lunar Eclipse of 2009 July 07 (NASA)
7	Moon at apogee (farthest from Earth) at 22h UT (distance 406,232 km; angular size 29.4').
9	Jupiter 0.6° SSE of Neptune at 17h UT (midnight sky). Mags. -2.7 and +7.8.
10	Moon near Jupiter at 19h UT (midnight sky).
12	Mars near Pleiades at 10h UT (50° from Sun, morning sky). Mag. +1.1.
14	Mercury at superior conjunction with the Sun at 2h UT. The planet passes into the evening sky.
14	Venus 3.1° N of Aldebaran at 6h UT (42° from Sun, morning sky). Mags. -4.1 and +0.9.
15	Last Quarter Moon at 9:53 UT.
18	Moon near Pleiades at 3h UT (morning sky).
18	Moon near Mars at 11h UT (51° from Sun, morning sky).
19	Moon near Venus at 5h UT (41° from Sun, morning sky). Mag. -4.1.
21	Moon at perigee (closest to Earth) at 20h UT (357,463 km; 33.4'). Only 6 hours before New Moon. High tides expected.
22	New Moon at 2:34 UT. Start of lunation 1071. • Lunation Number (Wikipedia)
22	Total Solar Eclipse visible from parts of India, Nepal, China, and central Pacific Ocean. Partial phases visible from most of Asia and Pacific. Greatest totality (6m 39s) occurs at 2:35 UT. • The Great Eclipse of 2009 (Sky & Telescope) • Solar Eclipses for Beginners (Mr Eclipse) • Total Solar Eclipse of 2009 July 22 (NASA) • Google Map: Solar Eclipse Path (NASA) • Solar Eclipse Path (NASA)
24	Moon near Regulus at 3h UT (evening sky).
25	Moon near Saturn at 10h UT (evening sky). Mag. +1.1.
28	First Quarter Moon at 21:59 UT.
31	Moon very near Antares at 16h UT (evening sky). Occultation visible from S Asia, NE Africa, and SE Europe. • Occultation of Antares (IOTA)
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 2009 (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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