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July 2003

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Day Moonage Phenomenon (JST)
1 Tue 1.3 V-Cas is its maximum brightness (Mag: 6.9-13.4, Period: 229 days)
RS-Lib is its maximum brightness (Mag: 7.0-13.0, Period: 218 days)
03:47 Algol is its minimum brightness
08:50 Saturn approaches closest to Mercury (01°32.7')
09:45 Mercury passes 01°32.8' north of Saturn
2 Wed 2.3 15:45 `Hangesho' (Longitude of the sun reaches 100 degrees)
3 Thu 3.3 05:31 Moon passes 04°28.0' north of Jupiter
21:32 δ-Lib is its minimum brightness
4 Fri 4.3 00:36 Algol is its minimum brightness
14:30 Earth passes the aphelion (1.0167282AU, solar Dia.: 31'28")
5 Sat 5.3 16:48 Mercury is at the superior conjunction (01°20.4' north of Sun, Mag: -2.2, Dia.: 05.1")
16:57 Mercury approaches closest to Sun (01°20.4')
6 Sun 6.3
7 Mon 7.3 Tanabata
00:39 Comet 36P/Whipple (Period: 8.5 years) passes the perihelion
02:04 Moon passes the equator, to the southern hemisphere
02:11 Moon approaches closest to Asteroid Vesta (03°11.2')
11:32 First quarter moon
21:36 `Shousho' (Longitude of the sun reaches 105 degrees)
8 Tue 8.3 16:51 Saturn approaches closest to Venus (00°49.4')
16:54 Venus passes 00°49.4' north of Saturn
9 Wed 9.3 10:18 Comet C/2001 HT50 (LINEAR-NEAT) passes the perihelion
10 Thu 10.3 21:07 δ-Lib is its minimum brightness
11 Fri 11.3 07h Moon is at the nearest from the Earth (0.950, 365,138km, Dia.: 32'44")
22:48 Moon passes 11°15.7' south of Pluto
12 Sat 12.3
13 Sun 13.3 07:56 Moon is at the southernmost (Decl.: -26°27.8')
14 Mon 14.3 R-Psc is its maximum brightness (Mag: 7.0-14.8, Period: 345 days)
04:21 Full Moon
15 Tue 15.3 14:24 Moon passes 05°04.9' south of Neptune
16 Wed 16.3
17 Thu 17.3 01:15 Moon passes 04°37.1' south of Uranus
03:15 Comet 118P/Shoemaker-Levy 4 (Period: 6.5 years) passes the perihelion
17:15 Moon passes 00°20.3' north of Mars (occultation of Mars around Central America and South America)
20:42 δ-Lib is its minimum brightness
18 Fri 18.3
19 Sat 19.3 T-Dra is its maximum brightness (Mag: 7.2-13.5, Period: 421 days)
20 Sun 20.3 01:41 Moon passes the equator, to the northern hemisphere
11:39 Midsummer day (`Doyou, dog days') (Longitude of the sun reaches 117 degrees)
21 Mon 21.3 National holiday in Japan (`Umi no hi')
16:01 Last quarter moon
22 Tue 22.3
23 Wed 23.3 S-Ser is its maximum brightness (Mag: 7.0-14.1, Period: 372 days)
RR-Sgr is its maximum brightness (Mag: 5.4-14.0, Period: 336 days)
05h Moon is at the farthest from the Earth (1.052, 404,333km, Dia.: 29'33")
15:04 `Taisho' (Longitude of the sun reaches 120 degrees)
24 Thu 24.3 02:16 Algol is its minimum brightness
20:18 δ-Lib is its minimum brightness
25 Fri 25.3
26 Sat 26.3 08:04 Moon approaches closest to Asteroid Ceres (03°43.5')
10:07 Mercury passes 00°23.4' north of Jupiter
12:44 Jupiter approaches closest to Mercury (00°21.5')
18:06 Asteroid Ceres (Mag: 9.0) approaches closest to M1 (Crab nebula) (00°10.2')
23:05 Algol is its minimum brightness
27 Sun 27.3 09:05 Moon passes 03°58.4' north of Saturn
12:58 Moon is at the northernmost (Decl.: +26°29.6')
28 Mon 28.3 R-Vir is its maximum brightness (Mag: 6.1-12.1, Period: 146 days)
29 Tue 29.3 RS-Her is its maximum brightness (Mag: 7.0-13.0, Period: 220 days)
02:50 Moon passes 03°42.8' north of Venus
15:53 New Moon
30 Wed 0.8 RS-Vir is its maximum brightness (Mag: 7.0-14.6, Period: 354 days)
04h δ-Aquarids (south) meteor shower is at the peak (Jul.15 - Aug.20)
22:04 Moon passes 04°28.2' north of Jupiter
31 Thu 1.8 06:47 Mars is at the apogee (R.A.: 22h56.0m)
09:36 Moon passes 04°46.3' north of Mercury
19:53 δ-Lib is its minimum brightness

Special Thanks to Shirakawa Astronomical Observatory


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