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// astronomy · 1971

Orbiting Solar Observatory 7

Solar space observatory. Orbiting Solar Observatory 7 was launched on September 29, 1971 aboard a Thor Delta N from Cape Canaveral & Kennedy. Latest status in GCAT: reentered (orbital decay) (Jul 9, 1974).

COSPAR 1971-083ANORAD 5491United States

Identity

Name in GCAT
OSO 7
Common name
Orbiting Solar Observatory 7
Payload designation
OSO H
International designator
1971-083A
NORAD catalog number
5491
GCAT identifier
S05491
UN registration
A/AC.105/INF.242

Mission

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

Launch

Date
September 29, 1971 · 09:45 UTC
Launch record
1971-083Partial · 0.75
Spaceport
Cape Canaveral & Kennedy · pad LC17A

Orbit and fate

Orbit class (GCAT)
LLEO/I
Perigee
324 km
Apogee
569 km
Inclination
33.13°
Status
Reentered (orbital decay)
Status date
July 9, 1974
Last known active
Jul 9, 1974
End of operations
Jul 9, 1974

Size

Mass
642 kg
Dry mass
642 kg
Length
1.9 m
Diameter
1.40 m
Span
2.0 m

Launched together

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q7073038 (CC0).