Planets TonightNeptune in 2015: brightness, position and events
Brightest+7.7around Aug 15
Closest (in table)28.953 au4331 million km
Farthest30.957 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2015-02-26 13:54 | Conjunction with the Sun | +7.8 | 30.957 | Aquarius | 0.7° |
| 2015-09-01 12:37 | Opposition | +7.7 | 28.953 | Aquarius | 179.2° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.8 | 30.522 | Aquarius | 55° E | Evening sky |
| Jan 15 | +7.8 | 30.702 | Aquarius | 41° E | Evening sky |
| Feb 1 | +7.8 | 30.862 | Aquarius | 24° E | Evening sky |
| Feb 15 | +7.8 | 30.937 | Aquarius | 11° E | Too close to the Sun |
| Mar 1 | +7.8 | 30.957 | Aquarius | 3° W | Too close to the Sun |
| Mar 15 | +7.8 | 30.920 | Aquarius | 16° W | Morning sky |
| Apr 1 | +7.8 | 30.804 | Aquarius | 33° W | Morning sky |
| Apr 15 | +7.8 | 30.655 | Aquarius | 46° W | Morning sky |
| May 1 | +7.8 | 30.440 | Aquarius | 61° W | Morning sky |
| May 15 | +7.8 | 30.222 | Aquarius | 74° W | Morning sky |
| Jun 1 | +7.8 | 29.938 | Aquarius | 91° W | Morning sky |
| Jun 15 | +7.8 | 29.704 | Aquarius | 104° W | Morning sky |
| Jul 1 | +7.7 | 29.454 | Aquarius | 119° W | Morning sky |
| Jul 15 | +7.7 | 29.264 | Aquarius | 133° W | Morning sky |
| Aug 1 | +7.7 | 29.086 | Aquarius | 149° W | Morning sky |
| Aug 15 | +7.7 | 28.992 | Aquarius | 163° W | Most of the night |
| Sep 1 | +7.7 | 28.953 | Aquarius | 179° W | Most of the night |
| Sep 15 | +7.7 | 28.985 | Aquarius | 166° E | Most of the night |
| Oct 1 | +7.7 | 29.091 | Aquarius | 150° E | Evening sky |
| Oct 15 | +7.7 | 29.237 | Aquarius | 136° E | Evening sky |
| Nov 1 | +7.7 | 29.471 | Aquarius | 119° E | Evening sky |
| Nov 15 | +7.8 | 29.696 | Aquarius | 105° E | Evening sky |
| Dec 1 | +7.8 | 29.970 | Aquarius | 88° E | Evening sky |
| Dec 15 | +7.8 | 30.209 | Aquarius | 74° 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 August 2015 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.