A table listing some of the Astronomical Phenomena for April 2018:
| Day (UT) | Time (UT) | Event |
|---|---|---|
| 1 | 01:07 | Mercury is at inferior conjunction. |
| 1 | 07:29 | Moon 7.3 degrees north of Spica (mag. +1.0). |
| 2 | 11:58 | Mars (mag. +0.3) 1.3 degrees south of Saturn (mag. +0.5). |
| 3 | 14:14 | Jupiter (mag. -2.4) 3.9 degrees south of Moon. |
| 4 | 23:34 | Moon 9.3 degrees north of Antares (mag. +1.0). |
| 6 | 20:18 | Vesta (mag. +6.9) 2.6 degrees north of Moon. |
| 7 | 12:35 | Saturn (mag. +0.5) 1.9 degrees south of Moon. |
| 7 | 18:16 | Mars (mag. +0.2) 3.1 degrees south of Moon. |
| 8 | 05:31 | Moon at apogee approx. 404,144 kilometres or 251,123 miles from the Earth. |
| 8 | 07:18 | Last quarter moon. |
| 12 | 22:44 | Neptune (mag. +8.0) 1.9 degrees north of Moon. |
| 14 | 03:55 | Mercury (mag. +1.9) begins direct motion. |
| 14 | 09:24 | Mercury (mag. +1.9) 3.9 degrees north of Moon. |
| 14 | 17:58 | Dwarf planet Haumea (mag. +17.3) is at opposition in Boötes distance 49.6 AU from the Earth. |
| 16 | 01:58 | New moon. |
| 16 | 10:37 | Saturn (mag. +0.4) at aphelion 10.066 AU (approx. 1,505.9 million kilometres or 935.69 million miles) from the Sun. |
| 17 | 19:27 | Venus (mag. -3.9) 5.4 degrees north of Moon. |
| 17 | 23:52 | Saturn (mag. +0.4) begins retrograde motion. |
| 18 | 19:14 | Uranus is at superior conjunction. |
| 19 | 05:11 | Moon 1.1 degrees north of Aldebaran. |
| 20 | 14:33 | Moon at perigee approx. 368,712 kilometres or 229,107 miles from the Earth. |
| 22 | 18:00 | Lyrids meteor shower peaks ZHR = 20. |
| 22 | 08:32 | Moon 8.2 degrees south of Pollux (mag. +1.1). |
| 22 | 20:01 | Pluto (mag. +14.3) begins retrograde motion. |
| 22 | 21:46 | First quarter moon. |
| 23 | 10:42 | Mercury (mag. +0.7) at aphelion 0.467 AU (approx. 69.9 million kilometres or 43.4 million miles) from the Sun. |
| 24 | 20:05 | Moon 1.2 degrees north of Regulus (mag. +1.4), occultation visible from |
| 26 | 00:14 | Pluto (mag. +14.3) 1.4 degrees north of Mars (mag. -0.3). |
| 28 | 08:35 | Ceres (mag. +8.3) at perihelion 2.558 AU (approx. 382.7 million kilometres or 237.8 million miles) from the Sun. |
| 28 | 15:31 | Moon 7.3 degrees north of Spica (mag. +1.0). |
| 29 | 18:17 | Mercury (mag. +0.4) at greatest elongation 27.0 degrees west in the morning sky. |
| 30 | 00:59 | Full moon. |
| 30 | 17:16 | Jupiter (mag. -2.5) 3.8 degrees south of Moon. |