Planets TonightNeptune in 2042: brightness, position and events
Brightest+7.7around Oct 15
Closest (in table)28.814 au4311 million km
Farthest30.812 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2042-04-28 07:14 | Conjunction with the Sun | +7.8 | 30.813 | Aries | 1.7° |
| 2042-11-01 14:55 | Opposition | +7.7 | 28.814 | Aries | 178.2° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.7 | 29.385 | Aries | 114° E | Evening sky |
| Jan 15 | +7.7 | 29.617 | Aries | 100° E | Evening sky |
| Feb 1 | +7.8 | 29.911 | Aries | 83° E | Evening sky |
| Feb 15 | +7.8 | 30.146 | Aries | 69° E | Evening sky |
| Mar 1 | +7.8 | 30.361 | Aries | 55° E | Evening sky |
| Mar 15 | +7.8 | 30.543 | Aries | 42° E | Evening sky |
| Apr 1 | +7.8 | 30.707 | Aries | 25° E | Evening sky |
| Apr 15 | +7.8 | 30.787 | Aries | 12° E | Too close to the Sun |
| May 1 | +7.8 | 30.812 | Aries | 3° W | Too close to the Sun |
| May 15 | +7.8 | 30.776 | Aries | 16° W | Morning sky |
| Jun 1 | +7.8 | 30.663 | Aries | 32° W | Morning sky |
| Jun 15 | +7.8 | 30.519 | Aries | 45° W | Morning sky |
| Jul 1 | +7.8 | 30.308 | Aries | 60° W | Morning sky |
| Jul 15 | +7.8 | 30.093 | Aries | 73° W | Morning sky |
| Aug 1 | +7.8 | 29.812 | Aries | 89° W | Morning sky |
| Aug 15 | +7.7 | 29.578 | Aries | 102° W | Morning sky |
| Sep 1 | +7.7 | 29.311 | Aries | 119° W | Morning sky |
| Sep 15 | +7.7 | 29.120 | Aries | 132° W | Morning sky |
| Oct 1 | +7.7 | 28.950 | Aries | 148° W | Morning sky |
| Oct 15 | +7.7 | 28.854 | Aries | 162° W | Most of the night |
| Nov 1 | +7.7 | 28.814 | Aries | 178° W | Most of the night |
| Nov 15 | +7.7 | 28.847 | Aries | 166° E | Most of the night |
| Dec 1 | +7.7 | 28.956 | Aries | 149° E | Evening sky |
| Dec 15 | +7.7 | 29.108 | Aries | 135° 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 October 2042 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.