Planets TonightNeptune in 2028: brightness, position and events
Brightest+7.7around Sep 15
Closest (in table)28.862 au4318 million km
Farthest30.861 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2028-03-26 20:15 | Conjunction with the Sun | +7.8 | 30.864 | Pisces | 1.4° |
| 2028-09-30 11:48 | Opposition | +7.7 | 28.862 | Cetus | 178.5° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.8 | 29.959 | Pisces | 84° E | Evening sky |
| Jan 15 | +7.8 | 30.195 | Pisces | 70° E | Evening sky |
| Feb 1 | +7.8 | 30.454 | Pisces | 53° E | Evening sky |
| Feb 15 | +7.8 | 30.628 | Pisces | 39° E | Evening sky |
| Mar 1 | +7.8 | 30.767 | Pisces | 24° E | Evening sky |
| Mar 15 | +7.8 | 30.842 | Pisces | 11° E | Too close to the Sun |
| Apr 1 | +7.8 | 30.861 | Pisces | 6° W | Too close to the Sun |
| Apr 15 | +7.8 | 30.815 | Cetus | 19° W | Morning sky |
| May 1 | +7.8 | 30.699 | Cetus | 34° W | Morning sky |
| May 15 | +7.8 | 30.548 | Cetus | 47° W | Morning sky |
| Jun 1 | +7.8 | 30.316 | Cetus | 63° W | Morning sky |
| Jun 15 | +7.8 | 30.097 | Cetus | 76° W | Morning sky |
| Jul 1 | +7.8 | 29.830 | Cetus | 91° W | Morning sky |
| Jul 15 | +7.7 | 29.597 | Cetus | 104° W | Morning sky |
| Aug 1 | +7.7 | 29.334 | Cetus | 121° W | Morning sky |
| Aug 15 | +7.7 | 29.148 | Cetus | 134° W | Morning sky |
| Sep 1 | +7.7 | 28.977 | Cetus | 151° W | Most of the night |
| Sep 15 | +7.7 | 28.891 | Cetus | 165° W | Most of the night |
| Oct 1 | +7.7 | 28.862 | Cetus | 178° E | Most of the night |
| Oct 15 | +7.7 | 28.900 | Cetus | 165° E | Most of the night |
| Nov 1 | +7.7 | 29.022 | Pisces | 147° E | Evening sky |
| Nov 15 | +7.7 | 29.178 | Pisces | 133° E | Evening sky |
| Dec 1 | +7.7 | 29.406 | Pisces | 117° E | Evening sky |
| Dec 15 | +7.7 | 29.634 | Pisces | 102° 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 2028 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.