Deep-space Rendezvous
| Date (GMT) | Spacecraft | Event | Remarks |
|---|---|---|---|
| 23 January | Phobos 1 | Flyby of Mars | Failed orbiter mission |
| 29 January | Phobos 2 | Areocentric orbit injection | |
| 27 March | Phobos 2 | Enters synchronous orbit of Phobos | |
| 25 August | Voyager 2 | Flyby of Neptune | Closest approach: 44,800 kilometres (27,800 mi) |
Read more about this topic: 1989 In Spaceflight