Close approach of Neptune and Mercury on 11 April 2027 at 10:34
General information
The closest separation between Neptune and Mercury will occur on 11 April 2027 at 10:34, when they will be separated by roughly 0.211°. At closest approach: The event occurs during daylight, making observation difficult. An observing opportunity within the separation window: 11 April 2027 at 05:30, separation about 0.4°.
Visibility window
The event begins when the separation drops below 1.5° at about 10 April 2027 at 16:30, and ends when it grows beyond 1.5° at about 12 April 2027 at 10:27. The objects can be followed during this interval when observing conditions permit.Elevation and direction at closest approach
At closest approach, Neptune and Mercury will be approximately 83° above the horizon toward the east.Constellation
Both objects will be located in or near the constellation Pisces. This can help you locate them in the sky.Track Neptune / Mercury 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
| Neptune | Mercury | |
|---|---|---|
| Time | 10:34 | |
| Angular separation (°) | 0.21 | |
| Geocentric coordinates | RA: 00h 19m 32s", Dec: 00° 38' 33s | RA: 00h 19m 09s", Dec: 00° 27' 12s |
| Topocentric coordinates | RA: 00h 19m 32s", Dec: 00° 38' 33s | RA: 00h 19m 10s", Dec: 00° 27' 12s |
| Distance | 30.832 AU (4,612,401,549 km) | 1.2433 AU (185,995,033 km) |
| Angular size | 2.2" | 5.4" |
| Altitude (°) | 83 | 83 |
| Azimuth (°) | 85 East | 86 East |