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. TETR 2
// calibration · 1968

TETR 2

TETR 2 was launched on November 8, 1968 aboard a Thor Delta E1 from Cape Canaveral & Kennedy. Latest status in GCAT: reentered (orbital decay) (Sep 19, 1979).

COSPAR 1968-100BNORAD 3534United States

Identity

Name in GCAT
TETR 2
Payload designation
ERS 31
Other names
TETR B:P
International designator
1968-100B
NORAD catalog number
3534
GCAT identifier
S03534
UN registration
A/AC.105/INF.201

Mission

Mission type
Calibration
Use
Civil government
Program
TTS
Owner
GSFC
Country
United States
Builder
TRW Inc.
Platform (bus)
ORS

Launch

Date
November 8, 1968 · 09:46 UTC
Launch record
1968-100Success
Spaceport
Cape Canaveral & Kennedy · pad LC17B

Orbit and fate

Orbit class (GCAT)
LEO/I
Perigee
379 km
Apogee
934 km
Inclination
32.87°
Status
Reentered (orbital decay)
Status date
September 19, 1979
Last known active
December 1968
End of operations
December 1968

Size

Mass
18 kg
Dry mass
18 kg
Length
0.3 m
Diameter
0.30 m
Span
1.0 m

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q2847309 (CC0).