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December 1998 |
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| Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sep. | Oct. | Nov. | Dec. |
| 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 |
| Day | Moonage | Phenomenon (JST) | |
|---|---|---|---|
| 1 | Tue | 11.9 | 01:50 Moon passes 01o50'.4 south of Saturn |
| 19:02 Mercury passes 10o25'.3 south of Pluto | |||
| 22:52 Mercury is closest to Sun (01o07'.8) | |||
| 2 | Wed | 12.9 | 02:10 Mercury is at inferior conjunction(01o10'.7,Mag:5.3,Dia.:9".9 north of Sun) |
| 12:05 Pluto is at conjunction(11o30'.0,Mag:13.9,Dia.:0".1 north of Sun) | |||
| 21h Moon is nearest to the Earth (358,840km,Dia.:33'18".0) | |||
| 21:01 Lambda-Tau is at minimum brightness | |||
| 3 | Thu | 13.9 | Mira is at maximum brightness (Mag:Period 332 days, 2.3-10.1) |
| 20:52 Occultation of Aldebaran(Mag:1.1)(time in Tokyo) | |||
| (Occultation of Ceres in South America) | |||
| 4 | Fri | 14.9 | 00:19 Full Moon |
| 5 | Sat | 15.9 | 19:56 Moon is at north most(Decl.:+19o31'.4) |
| 6 | Sun | 16.9 | T-Her is at maximum brightness (Mag:Period 165 days, 6.8-13.7) |
| 19:53 Lambda-Tau is at minimum brightness | |||
| 7 | Mon | 17.9 | 17:02 Longitude of the sun reaches 255 degrees |
| 8 | Tue | 18.9 | 05:44 Algol is at minimum brightness |
| 9 | Wed | 19.9 | 00:49 Moon is closest to Asteroid Vesta (02o56'.4) |
| 10 | Thu | 20.9 | T-Dra is at maximum brightness (Mag:Period 421 days,7.2-13.5) |
| 18:46 Lambda-Tau is at minimum brightness | |||
| 11 | Fri | 21.9 | Mon meteor shower is at peak(Dec.5-Dec.17) |
| 02:21 Occultation of Sigma-Leo(4.1)(time in Tokyo) | |||
| 02:33 Algol is at minimum brightness | |||
| 02:54 Last quarter moon | |||
| 15:11 Mercury is at apogee(R.A.:15h59m.1) | |||
| 12 | Sat | 22.9 | 16:41 Moon passes 01o49'.6 north of Mars |
| 17:56 Moon passes equator, to southern hemisphere | |||
| 13 | Sun | 23.9 | 12h Heliocentric latitude of Mercury is most at north |
| 23:22 Algol is at minimum brightness | |||
| 14 | Mon | 24.9 | 09:24 Jupiter is most at east(Mag:-2.4,Dia.:40".2) |
| 13h Gem meteor shower is at peak(Dec.7-Dec.18) | |||
| 17:38 Lambda-Tau is at minimum brightness | |||
| 15 | Fri | 25.9 | 02h Moon is farthest from the Earth (405,754km,Dia.:29'27".0) |
| 04:11 Delta-Lib is at minimum brightness | |||
| 16 | Wed | 26.9 | 08:32 Moon is closest to Asteroid Juno (03o11'.7) |
| 20:11 Algol is at minimum brightness | |||
| 17 | Thu | 27.9 | 07h Mars passses aphelion(1.66590AU) |
| 09:14 Moon passes 02o32'.0 north of Mercury | |||
| 21:48 Moon passes 06o33'.7 south of Pluto | |||
| 18 | Fri | 28.9 | |
| 19 | Sat | 0.2 | 07:42 New Moon |
| 17:00 Algol is at minimum brightness | |||
| 20 | Sun | 1.2 | 06:26 Moon is at south most(Decl.:-19o34'.5) |
| 10:43 Moon passes 04o26'.4 north of Venus | |||
| 12:54 Mercury is at western greatest elongation(21o38'.3,Mag:-0.4,Dia.:6".6) | |||
| 21 | Mon | 2.2 | T-Hya is at maximum brightness (Mag:Period 298 days,6.7-13.5) |
| 22 | Tue | 3.2 | 01:16 Moon passes 01o40'.5 north of Neptune |
| 03:45 Delta-Lib is at minimum brightness | |||
| 10:56 Longitude of the sun reaches 270 degrees | |||
| 19:47 Moon passes 01o47'.6 north of Uranus | |||
| 23 | Wed | 4.2 | Imperial Birthday |
| R-Dra is at maximum brightness (Mag:Period 245 days, 6.7-13.2) | |||
| 03h Beta-UMi meteor shower is at peak(Dec.18-Dec.24) | |||
| 21:57 Mercury passes 09o43'.9 south of Pluto | |||
| 24 | Thu | 5.2 | |
| 25 | Fri | 6.2 | Christmas |
| 19:32 Moon passes 01o11'.8 south of Jupiter(Occultation in Antarctic) | |||
| 26 | Sat | 7.2 | 19:46 First quarter moon |
| 27 | Sun | 8.2 | 02:41 Moon passes equator, to northern hemisphere |
| 28 | Mon | 9.2 | 08:24 Mon passes 02o08'.9 south of Saturn |
| 29 | Tue | 10.2 | 03:18 Delta-Lib is at minimum brightness |
| 30 | Wed | 11.2 | |
| 31 | Thu | 12.2 | 00:38 Saturn is at apogee(R.A.:01h43m.1) |
| 02:54 Occultation of Gamma-Tau(Mag:3.9)(time in Sapporo) | |||
| 03h Moon is nearest to the Earth (363,777km,Dia.:32'50".8) | |||
