Head to head

Atlas IIA vs Atlas IIAS

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 IIA: 6,580 kg

Atlas IIAS: 6,580 kg

Side by side

9 comparable figures

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

Metric	Atlas IIA	Atlas IIAS
Flights flown	23	30
Success rate	100%	100%
Payload to LEO (kg)	6,580	6,580
Payload to GTO (kg)	2,810	2,810
Liftoff thrust (kN)	2,479	4,391
Length (m)	47.54	47.54
Diameter (m)	3.04	3.04
Launch mass (t)	204	204
Stages	3	3

Atlas IIA

Flight record

100% success rate23 of 23 flown

1992peak 1996 · 4 flights2002

Maiden flight 1992-06-10. Retired.

Atlas IIAS

Flight record

100% success rate30 of 30 flown

1993peak 1997 · 5 flights2004

Maiden flight 1993-12-16. Retired.

Atlas IIA is built by Lockheed Martin of the United States (company profile on Space Index).Atlas IIAS is built by Lockheed Martin of the United States (company profile on Space Index).

Full specifications and the complete launch history for each: Atlas IIA · Atlas IIAS.

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