Planets TonightNeptune in 1987: brightness, position and events
Brightest+7.8around Jun 15
Closest (in table)29.219 au4371 million km
Farthest31.219 au
Events this year2
Brightest last year+7.8
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1987-06-29 05:46 | Opposition | +7.8 | 29.218 | Sagittarius | 178.9° |
| 1987-12-30 08:20 | Conjunction with the Sun | +7.9 | 31.213 | Sagittarius | 1.0° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +8.0 | 31.219 | Sagittarius | 5° W | Too close to the Sun |
| Jan 15 | +7.9 | 31.172 | Sagittarius | 18° W | Morning sky |
| Feb 1 | +7.9 | 31.041 | Sagittarius | 35° W | Morning sky |
| Feb 15 | +7.9 | 30.881 | Sagittarius | 49° W | Morning sky |
| Mar 1 | +7.9 | 30.684 | Sagittarius | 62° W | Morning sky |
| Mar 15 | +7.9 | 30.459 | Sagittarius | 76° W | Morning sky |
| Apr 1 | +7.9 | 30.170 | Sagittarius | 93° W | Morning sky |
| Apr 15 | +7.8 | 29.934 | Sagittarius | 107° W | Morning sky |
| May 1 | +7.8 | 29.685 | Sagittarius | 122° W | Morning sky |
| May 15 | +7.8 | 29.499 | Sagittarius | 136° W | Morning sky |
| Jun 1 | +7.8 | 29.330 | Sagittarius | 153° W | Most of the night |
| Jun 15 | +7.8 | 29.246 | Sagittarius | 166° W | Most of the night |
| Jul 1 | +7.8 | 29.219 | Sagittarius | 178° E | Most of the night |
| Jul 15 | +7.8 | 29.256 | Sagittarius | 164° E | Most of the night |
| Aug 1 | +7.8 | 29.373 | Sagittarius | 147° E | Evening sky |
| Aug 15 | +7.8 | 29.524 | Sagittarius | 134° E | Evening sky |
| Sep 1 | +7.8 | 29.759 | Sagittarius | 117° E | Evening sky |
| Sep 15 | +7.8 | 29.982 | Sagittarius | 104° E | Evening sky |
| Oct 1 | +7.9 | 30.253 | Sagittarius | 88° E | Evening sky |
| Oct 15 | +7.9 | 30.488 | Sagittarius | 74° E | Evening sky |
| Nov 1 | +7.9 | 30.751 | Sagittarius | 58° E | Evening sky |
| Nov 15 | +7.9 | 30.935 | Sagittarius | 44° E | Evening sky |
| Dec 1 | +7.9 | 31.095 | Sagittarius | 28° E | Evening sky |
| Dec 15 | +7.9 | 31.181 | Sagittarius | 15° E | Too close to the Sun |
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 June 1987 (magnitude +7.8); 2 conjunctions, oppositions or elongations occur this year.