December 1999

December 1999

1999

Day		Moonage	Phenomenon (JST)
1	Wed	23.0	19:13 Beta-Lyr is at minimum brightness
2	Thu	24.0	23:05 Moon passes equator, to southern hemisphere
3	Fri	25.0	09:43 Mercury is at western greatest elongation(20o22'.5,Mag:-0.5,Dia.:6".7)
			11:45 Mercury is closest to Asteroid Vesta (02o08'.3)
4	Sat	26.0	05:43 Moon passes 03o00' north of Venus
			21:03 Pluto is at conjunction(10o57'.0 north of Sun,Mag:13.9,Dia.:0".1)
5	Sun	27.0
6	Mon	28.0	06:20 Occultation of Asteroid Vesta(time is in Tokyo)
			08:28 Moon is closest to Asteroid Vesta (00o25'.1) (Occultation of Vesta in Pacific Ocean)
			09:55 Moon passes 02o50' north of Mercury
7	Tue	29.0	22h Comet P/1994 P1-A ( Machholz 2 ) (Period 5.21 years) passses perihelion
			22:47 Longitude of the sun reaches 255 degrees
8	Wed	0.2	07:32 New Moon
			20h Moon is farthest from the Earth 1.058(406,622km,Moonage 0.5,Dia.:29'.4)
9	Thu	1.2
10	Fri	2.2	06:08 Algol is at minimum brightness
			11:51 Moon is at south most(Decl.:-20o56'.3) most south in this year
			23h Comet 135P/Shoemaker-Levy 8 (Period 7.49 years) passses perihelion
11	Sat	3.2	Mon meteor shower is at peak(Dec.5-Dec.17)
			08:27 Uranus is closest to Theta-Cap(00o04'.7)
12	Sun	4.2	07:00 Moon passes 00o04' south of Neptune(Occultation of Neptune in Southern Pacific Ocean)
13	Mon	5.2	02:57 Algol is at minimum brightness
			03:39 Moon passes 00o34' north of Mars(Occultation in Atlantic Ocean)
			05:40 Moon passes 00o12' south of Uranus(Occultation of Uranus in South America)
14	Tue	6.2	13:49 Mars passes 00o39'.0 south of Uranus
			17:46 Beta-Lyr is at minimum brightness
			20h Alpha-Gem meteor shower is at peak(Dec.7-Dec.18)
			20:17 Uranus is closest to Mars (00o37'.2)
15	Wed	7.2	23:46 Algol is at minimum brightness
16	Thu	8.2	09:50 First quarter moon
			14h Comet 106P/Schuster (Period 7.29 years) passses perihelion
17	Fri	9.2	U-Cyg is at maximum brightness (Mag:5.9-12.1,Period 463 days)
			17:16 Moon passes equator, to northern hemisphere
18	Sat	10.2	14:50 Moon passes 04o02' south of Jupiter
			20:35 Algol is at minimum brightness
19	Sun	11.2	T-UMa is at maximum brightness (Mag:6.6-13.5,Period 256 days)
			18:16 Moon passes 02o48' south of Saturn
20	Mon	12.2	S-UMa is at maximum brightness (Mag:7.1-12.7,Period 285 days)
			01:20 Mercury passes 10o28'.4 south of Pluto
21	Tue	13.2	13:50 Jupiter is at apogee(R.A.:01h34.6m)
			17:24 Algol is at minimum brightness
22	Wed	14.2	16:44 Longitude of the sun reaches 270 degrees
			20h Moon is nearest to the Earth 0.928(356,656km,Moonage 14.5,Dia.:33'.5)
23	Thu	15.2	Imperial Birthday
			Chi-Cyg is at maximum brightness (Mag:3.3-14.2,Period 408 days)
			S-Scl is at maximum brightness (Mag:5.5-13.6,Period 362 days)
			02:31 Full Moon
			16h Beta-UMi meteor shower is at peak(Dec.18-Dec.24)
			19:44 Moon is at north most(Decl.:+20o57'.0) most north in this year
24	Fri	16.2
25	Sat	17.2	Christmas
			R-Vir is at maximum brightness (Mag:6.1-12.1,Period 145 days)
26	Sun	18.2
27	Mon	19.2	19h Comet 63P/Wild 1 (Period 13.2 years) passses perihelion
28	Tue	20.2	13:08 Asteroid Juno is at conjunction
29	Wed	21.2	23:04 Last quarter moon
30	Thu	22.2	06:21 Moon passes equator, to southern hemisphere
31	Fri	23.2

Special Thanks to Shirakawa Astronomical Observatory