A table listing some of the Astronomical Phenomena for May 2017:
Phenomena May
| Day | Event |
|---|---|
| 1 | Moon passes 10 degrees south of Pollux mag +1.1 (20 UT) |
| 2 | Mercury mag +2.3 is stationary in Pisces afterwards resumes direct motion (14 UT) |
| 3 | First quarter Moon (2:47 UT) |
| 4 | Moon passes 0.5 degrees south of Regulus mag +1.4, occultation is visible from Australia, New Zealand (10:15 UT) |
| 6 | Eta Aquariid meteor shower peaks ZHR = 55 |
| 6 | Mercury is at aphelion 0.467 AU (approx. 69.9 million kilometres or 43.4 million miles) from the Sun (14 UT) |
| 7 | Mars mag. +1.6 passes 6 degrees north of Aldebaran mag +0.9 (8 UT) |
| 7 | Moon passes 2 degrees north of Jupiter mag -2.4 (21 UT) |
| 7 | Mercury mag +1.4 passes 2 degrees south of Uranus mag +5.9 (23 UT) |
| 8 | Moon passes 6 degrees north of Spica mag +1.0 (13 UT) |
| 10 | Full Moon (21:43 UT) |
| 12 | Moon passes 10 degrees north of Antares mag +1.0 (10 UT) |
| 12 | Moon is at apogee 406,210 km or 252,407 miles from Earth (19:38 UT) |
| 13 | Moon passes 3 degrees north of Saturn mag +0.2 (23 UT) |
| 17 | Mercury mag +0.4 is at greatest elongation west 25.8 degrees (23 UT) |
| 19 | Last quarter Moon (0:33 UT) |
| 20 | Moon passes 0.5 degrees south of Neptune mag +7.9, occultation is visible from the South Atlantic (5:31 UT) |
| 22 | Moon passes 2 degrees south of Venus mag -4.5 (13 UT) |
| 23 | Moon passes 4 degrees south of Uranus mag +5.9 (5 UT) |
| 24 | Moon passes 2 degrees south of Mercury mag +0.1 (1 UT) |
| 25 | New Moon (19:45 UT) |
| 26 | Moon is at perigee 357,209 km or 221,959 miles from Earth (1:14 UT) |
| 27 | Moon passes 5 degrees south of Mars mag +1.7 (2 UT) |
| 31 | Moon passes 0.3 degrees south of Regulus mag +1.4, occultation is visible from central Africa, Madagascar (16:33 UT) |