APRIL 2021

SUMMARY 

The phenomena of the month : APRIL 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 04 01 11:46 Maximum of the variable star delta Cephei
2021 04 02 15:32 Minimum of the variable star Algol (beta Persei)
2021 04 03 18:16 Maximum of the variable star eta Aquilae
2021 04 04 00:00 EASTER DAY
2021 04 04 05:34 Opposition of the asteroid 9 Metis with the Sun (dist. to the Sun = 2.500 AU; magn. = 9.5)
2021 04 04 05:52 Beginning of occultation of 34-sigma Sgr, Nunki, (magn. = 2.05)
2021 04 04 07:04 End of occultation of 34-sigma Sgr, Nunki, (magn. = 2.05)
2021 04 04 10:02 LAST QUARTER OF THE MOON
2021 04 05 07:34 Close encounter between the Moon and Pluto (topocentric dist. centre to centre = 3.1°)
2021 04 05 12:21 Minimum of the variable star Algol (beta Persei)
2021 04 06 11:59 Close encounter between the Moon and Saturn (topocentric dist. centre to centre = 4.5°)
2021 04 06 20:33 Maximum of the variable star delta Cephei
2021 04 07 11:59 Close encounter between the Moon and Jupiter (topocentric dist. centre to centre = 4.9°)
2021 04 08 09:10 Minimum of the variable star Algol (beta Persei)
2021 04 09 16:08 Close encounter between the Moon and Neptune (topocentric dist. centre to centre = 4.4°)
2021 04 10 07:49 Maximum of the variable star zeta Gemini
2021 04 10 22:30 Maximum of the variable star eta Aquilae
2021 04 11 05:59 Minimum of the variable star Algol (beta Persei)
2021 04 12 02:31 NEW MOON
2021 04 12 05:21 Maximum of the variable star delta Cephei
2021 04 12 11:33 Minimum of the variable star beta Lyrae
2021 04 13 15:08 Close encounter between the Moon and Uranus (topocentric dist. centre to centre = 2.8°)
2021 04 14 02:49 Minimum of the variable star Algol (beta Persei)
2021 04 14 17:47 Moon at apogee (geocentric dist. = 406119 km)
2021 04 15 20:42 Beginning of occultation of 50-omega2 Tau (magn. = 4.93)
2021 04 15 20:52 End of occultation of 50-omega2 Tau (magn. = 4.93)
2021 04 16 23:38 Minimum of the variable star Algol (beta Persei)
2021 04 17 11:30 Close encounter between the Moon and Mars (topocentric dist. centre to centre = 0.8°)
2021 04 17 14:08 Maximum of the variable star delta Cephei
2021 04 18 00:52 Close encounter between the Moon and M 35 (topocentric dist. centre to centre = 0.2°)
2021 04 18 02:43 Maximum of the variable star eta Aquilae
2021 04 19 01:48 SUPERIOR CONJUNCTION of Mercury with the Sun (geoc. dist. centre to centre = 0.6°)
2021 04 19 19:17 End of occultation of 77-kappa Gem (magn. = 3.57)
2021 04 19 20:27 Minimum of the variable star Algol (beta Persei)
2021 04 20 06:59 FIRST QUARTER OF THE MOON
2021 04 20 11:26 Maximum of the variable star zeta Gemini
2021 04 20 20:49 Close encounter between the Moon and M 44 (topocentric dist. centre to centre = 2.2°)
2021 04 22 07:05 Meteor shower : Lyrids (18 meteors/hour at zenith; duration = 9.0 days)
2021 04 22 17:16 Minimum of the variable star Algol (beta Persei)
2021 04 22 20:38 Beginning of occultation of 46 Leo (magn. = 5.43)
2021 04 22 21:48 End of occultation of 46 Leo (magn. = 5.43)
2021 04 22 22:56 Maximum of the variable star delta Cephei
2021 04 25 06:57 Maximum of the variable star eta Aquilae
2021 04 25 10:06 Minimum of the variable star beta Lyrae
2021 04 25 14:05 Minimum of the variable star Algol (beta Persei)
2021 04 27 01:00 Mercury at its perihelion (distance to the Sun = 0.30750 AU)
2021 04 27 03:31 FULL MOON
2021 04 27 06:36 Close encounter between Mars and M 35 (topocentric dist. centre to centre = 0.5°)
2021 04 27 15:24 Moon at perigee (geocentric dist. = 357378 km)
2021 04 27 20:52 Beginning of occultation of 21-nu Lib (magn. = 5.19)
2021 04 27 21:49 End of occultation of 21-nu Lib (magn. = 5.19)
2021 04 28 07:43 Maximum of the variable star delta Cephei
2021 04 28 10:54 Minimum of the variable star Algol (beta Persei)
2021 04 30 01:47 Beginning of occultation of 42-theta Oph (magn. = 3.27)
2021 04 30 02:54 End of occultation of 42-theta Oph (magn. = 3.27)
2021 04 30 15:03 Maximum of the variable star zeta Gemini
2021 04 30 19:54 CONJUNCTION between Uranus and the Sun (geoc. dist. centre to centre = 0.4°)

(Using Coelix Software)