Planets TonightNeptune in 1981: brightness, position and events
Brightest+7.8around Jun 1
Closest (in table)29.261 au4377 million km
Farthest31.258 au
Events this year2
Brightest last year+7.8
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1981-06-15 00:51 | Opposition | +7.8 | 29.261 | Ophiuchus | 178.6° |
| 1981-12-16 23:53 | Conjunction with the Sun | +8.0 | 31.258 | Ophiuchus | 1.3° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +8.0 | 31.213 | Ophiuchus | 18° W | Morning sky |
| Jan 15 | +8.0 | 31.113 | Ophiuchus | 31° W | Morning sky |
| Feb 1 | +8.0 | 30.926 | Ophiuchus | 48° W | Morning sky |
| Feb 15 | +8.0 | 30.729 | Ophiuchus | 62° W | Morning sky |
| Mar 1 | +7.9 | 30.505 | Ophiuchus | 76° W | Morning sky |
| Mar 15 | +7.9 | 30.267 | Ophiuchus | 90° W | Morning sky |
| Apr 1 | +7.9 | 29.979 | Ophiuchus | 106° W | Morning sky |
| Apr 15 | +7.9 | 29.758 | Ophiuchus | 120° W | Morning sky |
| May 1 | +7.9 | 29.542 | Ophiuchus | 136° W | Morning sky |
| May 15 | +7.8 | 29.397 | Ophiuchus | 150° W | Morning sky |
| Jun 1 | +7.8 | 29.289 | Ophiuchus | 167° W | Most of the night |
| Jun 15 | +7.8 | 29.261 | Ophiuchus | 179° E | Most of the night |
| Jul 1 | +7.8 | 29.298 | Ophiuchus | 164° E | Most of the night |
| Jul 15 | +7.8 | 29.390 | Ophiuchus | 150° E | Most of the night |
| Aug 1 | +7.9 | 29.567 | Ophiuchus | 134° E | Evening sky |
| Aug 15 | +7.9 | 29.757 | Ophiuchus | 120° E | Evening sky |
| Sep 1 | +7.9 | 30.024 | Ophiuchus | 104° E | Evening sky |
| Sep 15 | +nan | 30.260 | Ophiuchus | 90° E | Evening sky |
| Oct 1 | +7.9 | 30.528 | Ophiuchus | 74° E | Evening sky |
| Oct 15 | +7.9 | 30.747 | Ophiuchus | 61° E | Evening sky |
| Nov 1 | +8.0 | 30.976 | Ophiuchus | 44° E | Evening sky |
| Nov 15 | +8.0 | 31.120 | Ophiuchus | 31° E | Evening sky |
| Dec 1 | +8.0 | 31.225 | Ophiuchus | 15° E | Evening sky |
| Dec 15 | +8.0 | 31.258 | Ophiuchus | 2° 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 1981 (magnitude +7.8); 2 conjunctions, oppositions or elongations occur this year.