Failed · Failure
7K-L1 no.5L. Second-stage engine failed at125.5seconds; escape capsule separated and landed hard after premature soft-landing-engine firing.
- Destinations
- Launch vehicle
- Proton-K/D
- Launch site
- Tyuratam (Baikonur Cosmodrome)
- Countries
- Soviet Union
- Mission types
- Technology demonstrator
Chronology
Mission timeline
Launch
7K-L1 no.5L launched; ascent failed
Second-stage engine failed at125.5seconds; escape capsule separated and landed hard after premature soft-landing-engine firing. Capsule hard landing is distinct from loss of the launch vehicle.
Earth
Mission architecture
Vehicles
Trajectory record
Trajectory dataset not yet available
Known dates and encounters do not uniquely determine a flight path. This mission’s sourced timeline is available above; no verified trajectory is currently published here.
What is needed to reconstruct this path?
- A frame-qualified position and vector velocity at an epoch, or equivalent complete orbital elements.
- Separate state histories and release epochs for the listed vehicles; a parent mission trajectory cannot be assigned to every component.
- Finer event-time constraints where required by an orbital reconstruction; the stored day/month/year precision is retained.
- The actual failed-flight state history. Intended destinations are not evidence that the spacecraft reached them.
Provenance
Sources
Each source is listed once and labeled with the mission, event, trajectory, or destination/body context it supports.
Data verified through October 12, 2026
- Tentatively Identified Missions and Launch Failures - NASA NSSDCA — NSSDCAArchive · Supports: mission claims · event claims
- GCAT: Failed to Orbit Catalog, J. McDowell — OTHEROther · Supports: mission claims
- GCAT: Launch Log, J. McDowell — OTHEROther · Supports: mission claims
- Siddiqi (2018): Beyond Earth, a chronicle of deep space exploration 1958–2016 — NASAMission page · Supports: mission claims · event claims
- Johnson (1995): The Soviet Reach for the Moon, L1 and L3 hardware — OTHERTechnical document · Supports: mission claims
- Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes 1958–2000, NASA/SP-2002-4524 — NASATechnical document · Supports: mission claims · event claims
- DE421 lunar mean-Earth and principal-axes frame specification — NAIFTechnical document · Supports: destination/body context
- DE440 lunar mean-Earth and principal-axes frame specification — NAIFSpice · Supports: destination/body context
- IAU rotational elements and body radii (PCK 00011) — NAIFSpice · Supports: destination/body context
- LOLA global lunar height maps, LDEM_4 V3 original PDS source label — NASATechnical document · Supports: destination/body context
- LOLA 2023 south-polar elevation, uncertainty and effective-resolution maps — NASATechnical document · Supports: destination/body context
- Blue Ghost Lunar Lander Seen From Above: LROC site and terrain context — NASATechnical document · Supports: destination/body context
- Moon Facts — NASAOther · Supports: destination/body context
- SLDEM2015 Blue Ghost region: original PDS elevation-grid label — NASATechnical document · Supports: destination/body context
- JPL Solar System Dynamics Astrodynamic Parameters — JPLOther · Supports: destination/body context
- Planet Sizes and Locations in Our Solar System — NASAOther · Supports: destination/body context