Planets TonightNeptune in 2038: brightness, position and events
Brightest+7.7around Oct 15
Closest (in table)28.831 au4313 million km
Farthest30.821 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2038-04-19 02:48 | Conjunction with the Sun | +7.8 | 30.824 | Pisces | 1.7° |
| 2038-10-23 15:29 | Opposition | +7.7 | 28.823 | Pisces | 178.2° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.7 | 29.544 | Pisces | 106° E | Evening sky |
| Jan 15 | +7.7 | 29.784 | Pisces | 91° E | Evening sky |
| Feb 1 | +7.8 | 30.075 | Pisces | 74° E | Evening sky |
| Feb 15 | +7.8 | 30.299 | Pisces | 60° E | Evening sky |
| Mar 1 | +7.8 | 30.494 | Pisces | 46° E | Evening sky |
| Mar 15 | +7.8 | 30.650 | Pisces | 33° E | Evening sky |
| Apr 1 | +7.8 | 30.776 | Pisces | 17° E | Evening sky |
| Apr 15 | +7.8 | 30.821 | Pisces | 4° E | Too close to the Sun |
| May 1 | +7.8 | 30.806 | Pisces | 12° W | Too close to the Sun |
| May 15 | +7.8 | 30.735 | Pisces | 25° W | Morning sky |
| Jun 1 | +7.8 | 30.584 | Pisces | 40° W | Morning sky |
| Jun 15 | +7.8 | 30.413 | Pisces | 54° W | Morning sky |
| Jul 1 | +7.8 | 30.179 | Pisces | 68° W | Morning sky |
| Jul 15 | +7.8 | 29.952 | Pisces | 82° W | Morning sky |
| Aug 1 | +7.8 | 29.667 | Pisces | 98° W | Morning sky |
| Aug 15 | +7.7 | 29.439 | Pisces | 111° W | Morning sky |
| Sep 1 | +7.7 | 29.191 | Pisces | 128° W | Morning sky |
| Sep 15 | +7.7 | 29.025 | Pisces | 141° W | Morning sky |
| Oct 1 | +7.7 | 28.891 | Pisces | 157° W | Most of the night |
| Oct 15 | +7.7 | 28.831 | Pisces | 172° W | Most of the night |
| Nov 1 | +7.7 | 28.837 | Pisces | 171° E | Most of the night |
| Nov 15 | +7.7 | 28.908 | Pisces | 156° E | Most of the night |
| Dec 1 | +7.7 | 29.056 | Pisces | 140° E | Evening sky |
| Dec 15 | +7.7 | 29.235 | Pisces | 126° 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 October 2038 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.