Planets TonightNeptune in 2010: brightness, position and events
Brightest+7.7around Aug 1
Closest (in table)29.009 au4340 million km
Farthest31.011 au
Events this year2
Brightest last year+7.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 2010-02-15 08:18 | Conjunction with the Sun | +7.8 | 31.011 | Capricornus | 0.4° |
| 2010-08-20 19:06 | Opposition | +7.7 | 29.006 | Capricornus | 179.5° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +7.8 | 30.724 | Capricornus | 44° E | Evening sky |
| Jan 15 | +7.8 | 30.870 | Capricornus | 30° E | Evening sky |
| Feb 1 | +7.8 | 30.981 | Capricornus | 14° E | Too close to the Sun |
| Feb 15 | +7.8 | 31.011 | Capricornus | 0° W | Too close to the Sun |
| Mar 1 | +7.8 | 30.984 | Capricornus | 14° W | Too close to the Sun |
| Mar 15 | +7.8 | 30.903 | Capricornus | 27° W | Morning sky |
| Apr 1 | +7.8 | 30.738 | Aquarius | 44° W | Morning sky |
| Apr 15 | +7.8 | 30.557 | Aquarius | 57° W | Morning sky |
| May 1 | +7.8 | 30.314 | Aquarius | 72° W | Morning sky |
| May 15 | +7.8 | 30.082 | Aquarius | 86° W | Morning sky |
| Jun 1 | +7.8 | 29.796 | Aquarius | 102° W | Morning sky |
| Jun 15 | +7.7 | 29.572 | Aquarius | 115° W | Morning sky |
| Jul 1 | +7.7 | 29.346 | Aquarius | 131° W | Morning sky |
| Jul 15 | +7.7 | 29.187 | Aquarius | 144° W | Morning sky |
| Aug 1 | +7.7 | 29.057 | Aquarius | 161° W | Most of the night |
| Aug 15 | +7.7 | 29.009 | Capricornus | 175° W | Most of the night |
| Sep 1 | +7.7 | 29.028 | Capricornus | 168° E | Most of the night |
| Sep 15 | +7.7 | 29.107 | Capricornus | 154° E | Most of the night |
| Oct 1 | +7.7 | 29.260 | Capricornus | 138° E | Evening sky |
| Oct 15 | +7.7 | 29.442 | Capricornus | 124° E | Evening sky |
| Nov 1 | +7.8 | 29.705 | Capricornus | 107° E | Evening sky |
| Nov 15 | +7.8 | 29.942 | Capricornus | 93° E | Evening sky |
| Dec 1 | +7.8 | 30.217 | Capricornus | 77° E | Evening sky |
| Dec 15 | +7.8 | 30.444 | Capricornus | 63° 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 2010 (magnitude +7.7); 2 conjunctions, oppositions or elongations occur this year.