Close approach of Mercury and Neptune on 11 April 2027 at 01:34
General information
The closest separation between Mercury and Neptune will occur on 11 April 2027 at 01:34, when they will be separated by roughly 0.211°. Both objects will be below the horizon and cannot be observed.
Visibility window
The event begins when the separation drops below 1° at about 11:53, and ends when it grows beyond 1° at about 15:13. The objects can be followed during this interval when observing conditions permit.Elevation and direction at closest approach
At closest approach, Mercury and Neptune will be approximately -30° above the horizon toward the north-east.Constellation
Both objects will be located in or near the constellation Pisces. This can help you locate them in the sky.Track Mercury / Neptune relative positions
| Time | 1807439640 |
| Altitude | |
| Azimuth |
Move the map to change the time and follow how the objects change position in the sky.
Close approach dynamics
The map shows the event from your location. Switch to global view for 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 Northeast | 63 Northeast |