Planets TonightNeptune in 2029: brightness, position and events
Brightest+7.7around Sep 15
Closest (in table)28.857 au4317 million km
Farthest30.857 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2029-03-29 08:24 | Conjunction with the Sun | +7.8 | 30.858 | Cetus | 1.4° |
| 2029-10-03 00:24 | Opposition | +7.7 | 28.857 | 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 | 29.928 | Pisces | 85° E | Evening sky |
| Jan 15 | +7.8 | 30.165 | Pisces | 71° E | Evening sky |
| Feb 1 | +7.8 | 30.427 | Pisces | 54° E | Evening sky |
| Feb 15 | +7.8 | 30.606 | Cetus | 40° E | Evening sky |
| Mar 1 | +7.8 | 30.742 | Cetus | 27° E | Evening sky |
| Mar 15 | +7.8 | 30.827 | Cetus | 13° E | Too close to the Sun |
| Apr 1 | +7.8 | 30.857 | Cetus | 3° W | Too close to the Sun |
| Apr 15 | +7.8 | 30.821 | Cetus | 16° W | Morning sky |
| May 1 | +7.8 | 30.716 | Cetus | 31° W | Morning sky |
| May 15 | +7.8 | 30.573 | Cetus | 44° W | Morning sky |
| Jun 1 | +7.8 | 30.348 | Pisces | 60° W | Morning sky |
| Jun 15 | +7.8 | 30.133 | Pisces | 73° W | Morning sky |
| Jul 1 | +7.8 | 29.868 | Pisces | 88° W | Morning sky |
| Jul 15 | +7.8 | 29.634 | Pisces | 102° W | Morning sky |
| Aug 1 | +7.7 | 29.366 | Pisces | 118° W | Morning sky |
| Aug 15 | +7.7 | 29.174 | Pisces | 132° W | Morning sky |
| Sep 1 | +7.7 | 28.993 | Cetus | 148° W | Morning sky |
| Sep 15 | +7.7 | 28.898 | Cetus | 162° W | Most of the night |
| Oct 1 | +7.7 | 28.857 | Cetus | 178° W | Most of the night |
| Oct 15 | +7.7 | 28.884 | Cetus | 167° E | Most of the night |
| Nov 1 | +7.7 | 28.994 | Cetus | 150° E | Evening sky |
| Nov 15 | +7.7 | 29.142 | Cetus | 136° E | Evening sky |
| Dec 1 | +7.7 | 29.363 | Cetus | 119° E | Evening sky |
| Dec 15 | +7.7 | 29.588 | Cetus | 105° 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 2029 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.