Phobos 1
 Illustration of the Phobos 1 spacecraft | |
| Operator | IKI |
|---|---|
| COSPAR ID | 1988-058A |
| SATCAT no. | 19281 |
| Website | Phobos Mission |
| Spacecraft properties | |
| Launch mass | 6,220 kg (13,710 lb) |
| Start of mission | |
| Launch date | 17:38:04, 7 July 1988 (UTC) |
| Rocket | Proton-K 8K82K/D-1 |
| Launch site | Baikonur Site 200/40 |
| Orbital parameters | |
| Reference system | Areocentric |
| Epoch | planned |
Phobos 1 was a failed uncrewed Soviet space probe of the Phobos Program, intended to explore Mars and its moon Phobos, launched in July 1988. The Phobos 1 probe failed on 28 August 1988 when a mistyped command deactivated crucial systems onboard the spacecraft. It was launched from Baikonur Cosmodrome aboard a Proton-K, with its twin probe Phobos 2. At 6,220 kg, they remained the heaviest interplanetary spacecraft until the 2011 Fobos-Grunt.