Planets TonightNeptune in 2023: brightness, position and events
Brightest+7.7around Sep 15
Closest (in table)28.904 au4324 million km
Farthest30.905 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2023-03-16 08:39 | Conjunction with the Sun | +7.8 | 30.905 | Pisces | 1.2° |
| 2023-09-19 20:17 | Opposition | +7.7 | 28.902 | Pisces | 178.7° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.8 | 30.194 | Aquarius | 72° E | Evening sky |
| Jan 15 | +7.8 | 30.415 | Aquarius | 58° E | Evening sky |
| Feb 1 | +7.8 | 30.641 | Aquarius | 42° E | Evening sky |
| Feb 15 | +7.8 | 30.781 | Aquarius | 28° E | Evening sky |
| Mar 1 | +7.8 | 30.870 | Aquarius | 14° E | Too close to the Sun |
| Mar 15 | +7.8 | 30.905 | Pisces | 1° E | Too close to the Sun |
| Apr 1 | +7.8 | 30.872 | Pisces | 15° W | Morning sky |
| Apr 15 | +7.8 | 30.786 | Pisces | 29° W | Morning sky |
| May 1 | +7.8 | 30.629 | Pisces | 44° W | Morning sky |
| May 15 | +7.8 | 30.449 | Pisces | 57° W | Morning sky |
| Jun 1 | +7.8 | 30.190 | Pisces | 73° W | Morning sky |
| Jun 15 | +7.8 | 29.959 | Pisces | 86° W | Morning sky |
| Jul 1 | +7.8 | 29.691 | Pisces | 101° W | Morning sky |
| Jul 15 | +7.7 | 29.468 | Pisces | 115° W | Morning sky |
| Aug 1 | +7.7 | 29.229 | Pisces | 131° W | Morning sky |
| Aug 15 | +7.7 | 29.073 | Pisces | 145° W | Morning sky |
| Sep 1 | +7.7 | 28.947 | Pisces | 162° W | Most of the night |
| Sep 15 | +7.7 | 28.904 | Pisces | 176° W | Most of the night |
| Oct 1 | +7.7 | 28.925 | Pisces | 168° E | Most of the night |
| Oct 15 | +7.7 | 29.006 | Pisces | 154° E | Most of the night |
| Nov 1 | +7.7 | 29.174 | Pisces | 137° E | Evening sky |
| Nov 15 | +7.7 | 29.361 | Pisces | 122° E | Evening sky |
| Dec 1 | +7.7 | 29.614 | Aquarius | 106° E | Evening sky |
| Dec 15 | +7.8 | 29.853 | Pisces | 92° 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 2023 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.