Head to head

Atlas SLV-3D Centaur vs Kosmos 11K63

Two vehicles in the same payload class. Every figure below comes from the same two sources for both rockets, and a row appears only when both publish the input.

Payload to low Earth orbit

Relative

Atlas SLV-3D Centaur: 800 kg

Kosmos 11K63: 300 kg

Side by side

7 comparable figures

The highlighted value wins the row. Rows where neither direction is better, like length or stage count, highlight nothing.

Metric	Atlas SLV-3D Centaur	Kosmos 11K63
Flights flown	32	126
Success rate	93.8%	93.7%
Payload to LEO (kg)	800	300
Length (m)	21	31
Diameter (m)	3.05	1.6
Launch mass (t)	120	48
Stages	2	2

Atlas SLV-3D Centaur

Flight record

93.8% success rate30 of 32 flown · 2 failed

1973peak 1978 · 7 flights1983

Maiden flight 1973-04-06. Retired.

Kosmos 11K63

Flight record

93.7% success rate118 of 126 flown · 8 failed

1965peak 1970 · 20 flights1977

Maiden flight 1966-05-24. Retired.

Atlas SLV-3D Centaur is built by Convair of the United States (company profile on Space Index).Kosmos 11K63 is built by Strategic Rocket Forces of Russia.

Full specifications and the complete launch history for each: Atlas SLV-3D Centaur · Kosmos 11K63.

Specifications from Launch Library 2 by The Space Devs, launch records from Space Index. Derived figures are computed here; see sources and method.