Planetary Science
PHOBOS 1
activePlanetary ScienceMars
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. They remain the heaviest interplanetary spacecraft ever launched as of 2026, at 6,220 kg.
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Launch
- Launch date
- July 7, 1988 at 05:38 PM UTC
- Launch site
- Baikonur Cosmodrome, Kazakhstan
- Launched by
- Proton-K/D-2 →
- Operator
- Soviet Space Program
- Mission
- Fobos-1
- Launch record
- View full launch →
Trajectory
- Regime
- Interplanetary — Mars
- Reference body
- Mars
Identity
- COSPAR (Int'l)
- 1988-058A
- NORAD catalog №
- 19281
- Object type
- Payload
- Owner / operator
Russia (CIS / former USSR)- Status
- active