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Atlas V
Atlas V
is an active
expendable launch system
in the
Atlas
rocket family. Atlas V was formerly operated by
Lockheed Martin
, and is now operated by the Lockheed Martin-
Boeing
joint venture
United Launch Alliance
. Each Atlas V
rocket
uses a
Russian
-built
RD-180
engine burning
kerosene
and
liquid oxygen
to power its
first stage
and an American-built
RL10
engine burning
liquid hydrogen
and liquid oxygen to power its
Centaur
upper stage. The RD-180 engines are provided by
RD AMROSS
, while
Aerojet Rocketdyne
provides both the RL10 engines and the
strap-on boosters
used in some configurations. The standard
payload fairing
sizes are 4 or 5 meters in diameter and of various lengths, and are made by
RUAG Space
. Fairings sizes as large as 7.2 m in diameter and up to 32.3 m in length have been considered. The rocket is assembled in
Decatur, Alabama
;
Harlingen, Texas
;
San Diego, California
; and at
United Launch Alliance
's headquarters near
Denver, Colorado
.
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