Key statistics
Satellite ESSA 9 (TOS-G) at a glance.
Uptime
20751
Days in orbit
Revolutions
≈ 12.5
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
101.4
Latest
Satellite identification and parameters
Extended collection of information and parameters for ESSA 9 (TOS-G).
Object identification
Identified? True
Debris? False
Object name: ESSA 9 (TOS-G)
International designator: 1969-016A
Object number (NORAD): 3764
Object ID (CCSDS): 3764
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 115.213 minutes
Inclination: 101.4001 deg
SMA: 7843.219 km
Apoapsis: 1505.426 km
Periapsis: 1424.741 km
RAAN: 357.0249 deg
Eccentricy: 0.00514361
Argument of periapsis: 100.9604 deg
Mean anomaly: 328.6841 deg
Mean motion: 12.49859729 rev/day
Mean motion (dot): -0.00000033 rev/day2
B* drag term: 0.000060585339 1/REarth
Two-line elements (TLE)
Creation date: Dec. 20, 2025, 3:40 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 19, 2025, 10:37 p.m. UTC
TLE line 0: 0 ESSA 9 (TOS-G)
TLE line 1: 1 03764U 69016A 25353.94290907 -.00000033 00000-0 60585-4 0 9995
TLE line 2: 2 03764 101.4001 357.0249 0051436 100.9604 328.6841 12.49859729965433
Live tracking on map
Real-time ground track for satellite ESSA 9 (TOS-G).
Associated space launch
The ESSA series was the second generation of US meterological satellites after the TIROS (Television & Infra-Red Observation Satellite) series. They were also called OT (Operational TIROS), TOS (TIROS Operational Satellite).
ESSA 9 (TOS-G) was lifted into orbit during the mission ‘Thor Delta E1 | ESSA 9’, on board a Thor Delta E1 space rocket.
The launch took place on Feb. 26, 1969, 7:47 a.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Thor Delta E1 | ESSA 9
Agency: N/A
Status: Launch Successful
Launch date: Feb. 26, 1969, 7:47 a.m. UTC
Rocket: Thor Delta E1
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
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