Close Approach of Mercury and Neptune at Sun, 11 April 2027, 01:34
General information
The closest separation between Mercury and Neptune will occur on Sun, 11 April 2027, 01:34, when they will be separated by roughly 0.211°. The close approach occurs while both objects are below the horizon and cannot be observed.
Visibility window
The close approach begins when their separation drops below 1°, around 11:53, and ends when their separation grows beyond 1°, around 15:13. Observers can see them in the sky during this interval.Elevation & direction at closest approach
At the moment of closest approach, Mercury and Neptune will be approximately -30° above the horizon, in the Northwest.Constellation
At the time of the closest approach, both objects will be located in or near the constellation Pisces, making it easier to locate them in the night sky.Track Mercury and Neptune Relative Positions
| Time | 1807439640 |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe changing position in the night sky.
Close Approch Dynamics
The map shows the event as it appears from your location. You can switch to Global view to see geocentric (Earth-centered) coordinates.
Close Approach Details
| Mercury | Neptune | |
|---|---|---|
| Time | 01:34 | |
| Angular separation (°) | 0.21 | |
| Geocentric Coordinates | RA: 00h 19m 09s", Dec: 00° 27' 12s | RA: 00h 19m 32s", Dec: 00° 38' 33s |
| Topocentric Coordinates | RA: 00h 19m 10s", Dec: 00° 27' 08s | RA: 00h 19m 32s", Dec: 00° 38' 32s |
| Distance | 1.2433 AU (185,995,033 km) | 30.832 AU (4,612,401,549 km) |
| Angular Size | 5.4" | 2.2" |
| Altitude (°) | -30 | -30 |
| Azimuth (°) | -64 Northwest | -63 Northwest |