Planets TonightNeptune in 2027: brightness, position and events
Brightest+7.7around Sep 15
Closest (in table)28.870 au4319 million km
Farthest30.865 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2027-03-25 08:12 | Conjunction with the Sun | +7.8 | 30.871 | Pisces | 1.3° |
| 2027-09-28 23:18 | Opposition | +7.7 | 28.868 | Pisces | 178.5° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.8 | 30.009 | Pisces | 81° E | Evening sky |
| Jan 15 | +7.8 | 30.243 | Pisces | 67° E | Evening sky |
| Feb 1 | +7.8 | 30.495 | Pisces | 50° E | Evening sky |
| Feb 15 | +7.8 | 30.662 | Pisces | 37° E | Evening sky |
| Mar 1 | +7.8 | 30.784 | Pisces | 23° E | Evening sky |
| Mar 15 | +7.8 | 30.854 | Pisces | 10° E | Too close to the Sun |
| Apr 1 | +7.8 | 30.865 | Pisces | 7° W | Too close to the Sun |
| Apr 15 | +7.8 | 30.813 | Pisces | 20° W | Morning sky |
| May 1 | +7.8 | 30.691 | Pisces | 35° W | Morning sky |
| May 15 | +7.8 | 30.536 | Pisces | 48° W | Morning sky |
| Jun 1 | +7.8 | 30.300 | Pisces | 64° W | Morning sky |
| Jun 15 | +7.8 | 30.078 | Pisces | 77° W | Morning sky |
| Jul 1 | +7.8 | 29.811 | Pisces | 92° W | Morning sky |
| Jul 15 | +7.7 | 29.579 | Pisces | 106° W | Morning sky |
| Aug 1 | +7.7 | 29.319 | Pisces | 122° W | Morning sky |
| Aug 15 | +7.7 | 29.137 | Pisces | 136° W | Morning sky |
| Sep 1 | +7.7 | 28.972 | Pisces | 152° W | Most of the night |
| Sep 15 | +7.7 | 28.892 | Pisces | 166° W | Most of the night |
| Oct 1 | +7.7 | 28.870 | Pisces | 177° E | Most of the night |
| Oct 15 | +7.7 | 28.914 | Pisces | 163° E | Most of the night |
| Nov 1 | +7.7 | 29.042 | Pisces | 146° E | Evening sky |
| Nov 15 | +7.7 | 29.203 | Pisces | 132° E | Evening sky |
| Dec 1 | +7.7 | 29.435 | Pisces | 115° E | Evening sky |
| Dec 15 | +7.7 | 29.666 | Pisces | 101° E | Evening sky |
Computed with the JPL DE421 ephemeris and Skyfield (times in JST). Magnitude and distance are for 12:00 JST on each date. Visibility is a rough guide for mid-northern latitudes such as Japan.
About this page
Neptune is brightest around September 2027 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.