The phenomena of the month : DECEMBER 2021

Times are given for SCARBOROUGH (0° 25' 5" W, 54° 16' 31" N, zone 0 Universal Time).

Date Hour Description of the phenomenon
yyyy mm dd hh:mm

2021 12 01 06:01 Opposition of the asteroid 521 Brixia with the Sun (dist. to the Sun = 2.004 AU; magn. = 9.2)
2021 12 01 09:56 Minimum of the variable star beta Lyrae
2021 12 02 08:38 Minimum of the variable star Algol (beta Persei)
2021 12 03 00:00 Mercury at its aphelion (distance to the Sun = 0.46670 AU)
2021 12 03 00:08 Close encounter between the Moon and Mars (topocentric dist. centre to centre = 0.2°)
2021 12 03 18:27 Maximum of the variable star eta Aquilae
2021 12 04 07:43 NEW MOON (total eclipse of the Sun not visible in SCARBOROUGH)
2021 12 04 08:01 Maximum of the variable star delta Cephei
2021 12 04 10:01 Moon at perigee (geocentric dist. = 356794 km)
2021 12 05 05:27 Minimum of the variable star Algol (beta Persei)
2021 12 06 18:00 VENUS at maximum brightness (magn. -4.71)
2021 12 07 01:33 Close encounter between the Moon and Venus (topocentric dist. centre to centre = 2.3°)
2021 12 07 03:27 Close encounter between the Moon and Pluto (topocentric dist. centre to centre = 3.0°)
2021 12 08 02:16 Minimum of the variable star Algol (beta Persei)
2021 12 08 03:26 Close encounter between the Moon and Saturn (topocentric dist. centre to centre = 4.6°)
2021 12 08 22:59 Meteor shower : Monocerotids (3 meteors/hour at zenith; duration = 20.0 days)
2021 12 08 22:59 Meteor shower : Sigma Hydrids (7 meteors/hour at zenith; duration = 12.0 days)
2021 12 09 07:40 Close encounter between the Moon and Jupiter (topocentric dist. centre to centre = 5.0°)
2021 12 09 16:48 Maximum of the variable star delta Cephei
2021 12 09 21:59 Maximum of the variable star zeta Gemini
2021 12 10 22:41 Maximum of the variable star eta Aquilae
2021 12 10 23:05 Minimum of the variable star Algol (beta Persei)
2021 12 11 01:35 FIRST QUARTER OF THE MOON
2021 12 11 04:27 Close encounter between the Moon and Neptune (topocentric dist. centre to centre = 4.4°)
2021 12 11 08:46 Opposition of the asteroid 44 Nysa with the Sun (dist. to the Sun = 2.116 AU; magn. = 9.1)
2021 12 11 13:37 Close encounter between Venus and Pluto (topocentric dist. centre to centre = 0.1°)
2021 12 13 19:54 Minimum of the variable star Algol (beta Persei)
2021 12 14 01:59 Meteor shower : Geminids (150 meteors/hour at zenith; duration = 12.0 days)
2021 12 14 08:31 Minimum of the variable star beta Lyrae
2021 12 15 01:36 Maximum of the variable star delta Cephei
2021 12 15 07:41 Close encounter between the Moon and Uranus (topocentric dist. centre to centre = 2.1°)
2021 12 15 20:17 Meteor shower : Coma Berenicids (3 meteors/hour at zenith; duration = 11.0 days)
2021 12 16 16:43 Minimum of the variable star Algol (beta Persei)
2021 12 17 21:45 Beginning of occultation of 94-tau Tau (magn. = 4.27)
2021 12 17 22:17 End of occultation of 94-tau Tau (magn. = 4.27)
2021 12 18 02:16 Moon at apogee (geocentric dist. = 406320 km)
2021 12 18 02:56 Maximum of the variable star eta Aquilae
2021 12 19 04:36 FULL MOON
2021 12 19 13:32 Minimum of the variable star Algol (beta Persei)
2021 12 19 18:40 Meteor shower : Dec. Leo Minorids (5 meteors/hour at zenith; duration = 61.0 days)
2021 12 20 01:35 Maximum of the variable star zeta Gemini
2021 12 20 10:24 Maximum of the variable star delta Cephei
2021 12 21 15:59 WINTER SOLSTICE
2021 12 22 10:19 Meteor shower : Ursids (10 meteors/hour at zenith; duration = 9.0 days)
2021 12 22 10:21 Minimum of the variable star Algol (beta Persei)
2021 12 24 04:28 Beginning of occultation of 30-eta Leo (magn. = 3.48)
2021 12 24 04:58 End of occultation of 30-eta Leo (magn. = 3.48)
2021 12 25 07:10 Minimum of the variable star Algol (beta Persei)
2021 12 25 07:11 Maximum of the variable star eta Aquilae
2021 12 25 11:46 Close encounter between Venus and Pluto (topocentric dist. centre to centre = 2.9°)
2021 12 25 19:12 Maximum of the variable star delta Cephei
2021 12 27 02:24 LAST QUARTER OF THE MOON
2021 12 27 07:06 Minimum of the variable star beta Lyrae
2021 12 27 17:59 Close encounter between Mars and Antares (topocentric dist. centre to centre = 4.5°)
2021 12 28 03:59 Minimum of the variable star Algol (beta Persei)
2021 12 29 05:46 Close encounter between Mercury and Venus (topocentric dist. centre to centre = 4.2°)
2021 12 30 05:10 Maximum of the variable star zeta Gemini
2021 12 30 10:04 Close encounter between Mercury and Pluto (topocentric dist. centre to centre = 0.2°)
2021 12 30 22:47 Opposition of the asteroid 22 Kalliope with the Sun (dist. to the Sun = 2.676 AU; magn. = 10.1)
2021 12 31 00:49 Minimum of the variable star Algol (beta Persei)
2021 12 31 03:59 Maximum of the variable star delta Cephei
2021 12 31 20:19 Close encounter between the Moon and Mars (topocentric dist. centre to centre = 1.5°)

(Using Coelix Software)