Planets TonightNeptune in 1990: brightness, position and events
Brightest+7.8around Jun 15
Closest (in table)29.192 au4367 million km
Farthest31.193 au
Events this year2
Brightest last year+7.8
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1990-01-03 02:55 | Conjunction with the Sun | +7.9 | 31.194 | Sagittarius | 0.8° |
| 1990-07-05 20:26 | Opposition | +7.8 | 29.190 | Sagittarius | 179.1° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.9 | 31.193 | Sagittarius | 2° E | Too close to the Sun |
| Jan 15 | +7.9 | 31.171 | Sagittarius | 12° W | Too close to the Sun |
| Feb 1 | +7.9 | 31.069 | Sagittarius | 29° W | Morning sky |
| Feb 15 | +7.9 | 30.930 | Sagittarius | 43° W | Morning sky |
| Mar 1 | +7.9 | 30.748 | Sagittarius | 56° W | Morning sky |
| Mar 15 | +7.9 | 30.535 | Sagittarius | 70° W | Morning sky |
| Apr 1 | +7.9 | 30.251 | Sagittarius | 87° W | Morning sky |
| Apr 15 | +7.8 | 30.012 | Sagittarius | 100° W | Morning sky |
| May 1 | +7.8 | 29.753 | Sagittarius | 116° W | Morning sky |
| May 15 | +7.8 | 29.552 | Sagittarius | 130° W | Morning sky |
| Jun 1 | +7.8 | 29.358 | Sagittarius | 146° W | Morning sky |
| Jun 15 | +7.8 | 29.250 | Sagittarius | 160° W | Most of the night |
| Jul 1 | +7.8 | 29.192 | Sagittarius | 176° W | Most of the night |
| Jul 15 | +7.8 | 29.203 | Sagittarius | 170° E | Most of the night |
| Aug 1 | +7.8 | 29.291 | Sagittarius | 154° E | Most of the night |
| Aug 15 | +7.8 | 29.421 | Sagittarius | 140° E | Evening sky |
| Sep 1 | +7.8 | 29.636 | Sagittarius | 124° E | Evening sky |
| Sep 15 | +7.8 | 29.849 | Sagittarius | 110° E | Evening sky |
| Oct 1 | +7.8 | 30.116 | Sagittarius | 94° E | Evening sky |
| Oct 15 | +7.9 | 30.354 | Sagittarius | 80° E | Evening sky |
| Nov 1 | +7.9 | 30.629 | Sagittarius | 64° E | Evening sky |
| Nov 15 | +7.9 | 30.829 | Sagittarius | 50° E | Evening sky |
| Dec 1 | +7.9 | 31.012 | Sagittarius | 34° E | Evening sky |
| Dec 15 | +7.9 | 31.122 | Sagittarius | 21° 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 June 1990 (magnitude +7.8); 2 conjunctions, oppositions or elongations occur this year.