2026-244Latest orbital launch: Falcon 9 · Starlink Group 15-16 · Oct 27, 2026 · VandenbergLaunch record →
sci-techmaventhe history of spaceflight, in data
  1. Home
  2. Spacecraft
  3. OSO 1
// astronomy · 1962

OSO 1

Solar space observatory. OSO 1 was launched on March 7, 1962 aboard a Thor Delta from Cape Canaveral & Kennedy. Latest status in GCAT: reentered (orbital decay) (Oct 8, 1981).

COSPAR 1962 ZET 1NORAD 255United States

Identity

Name in GCAT
OSO 1
Payload designation
NASA S-16
Other names
OSO A:P
International designator
1962 ZET 1
NORAD catalog number
255
GCAT identifier
S00255
UN registration
A/AC.105/INF.003

Mission

Mission type
Astronomy
Use
Civil government
Program
OSO
Owner
GSFC
Country
United States
Builder
Ball Aerospace
Platform (bus)
OSO

Launch

Date
March 7, 1962 · 16:06 UTC
Launch record
1962 ZETSuccess
Spaceport
Cape Canaveral & Kennedy · pad LC17A

Orbit and fate

Orbit class (GCAT)
LLEO/I
Perigee
546 km
Apogee
601 km
Inclination
32.83°
Status
Reentered (orbital decay)
Status date
October 8, 1981
Last known active
Aug 3, 1963
End of operations
Aug 3, 1963

Size

Mass
208 kg
Dry mass
208 kg
Length
0.9 m
Diameter
1.10 m
Span
2.3 m

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q16325215 (CC0).