Retired· McDonnell Douglas

Thor Delta E1

American orbital launch vehicle family with Thor first stage and a delta second stage.

Follow Thor Delta E1 in the app

Launches

since Jul 1966

Success rate

94.1%

16 of 17 successful

In a row

successful launches

Launches per Year

Full year2026 so far

Specifications

Height: 28 m
Diameter: 2.44 m
Liftoff mass: 68 t
Liftoff thrust: 1,450 kN
To low Earth orbit: 540 kg
To geostationary transfer: 150 kg
Stages: 4
First flight: July 1, 1966
Manufacturer: McDonnell Douglas

Next Launches

No Upcoming Launches

No launch is scheduled for this vehicle right now.

Space Launch Now for iOS and Android

Follow Thor Delta E1 and get a notification before each of its launches.

See what's in the app

Scan to open on your phone

[data-page-skeleton]{display:none}body{display:flex;flex-direction:column}body>footer{order:2}body>main{padding-bottom:0}body:has(>div[hidden][id^="S:"]>[data-data-unavailable]) header[data-site-header]{background:var(--canvas);border-color:var(--rule);color:var(--ink)}body:has(>div[hidden][id^="S:"]>[data-data-unavailable]) [data-header-scrim]{display:none}body>div[hidden][id^="S:"]>[data-data-unavailable]{max-width:calc(var(--container-content) + 2 * var(--s-5));padding:var(--s-9) var(--s-5) 0}body>div[hidden][id^="S:"]:last-of-type{padding-bottom:var(--s-9)}body:has(>div[id^="S:"] [data-app-promo])>div[hidden][id^="S:"]:last-of-type{padding-bottom:0}@layer base{body>div[hidden][id^="S:"]{display:block!important;order:1}}