ESSA 8 (TOS-F)

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite ESSA 8 (TOS-F) at a glance.

Uptime

20601

Days in orbit

Revolutions

≈ 12.6

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

101.6

Latest

Satellite identification and parameters

Extended collection of information and parameters for ESSA 8 (TOS-F).

Object identification

Identified? True

Debris? False

Object name: ESSA 8 (TOS-F)

International designator: 1968-114A

Object number (NORAD): 3615

Object ID (CCSDS): 3615

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: MEDIUM

Orbital parameters

Period: 114.628 minutes

Inclination: 101.6477 deg

SMA: 7816.631 km

Apoapsis: 1463.653 km

Periapsis: 1413.339 km

RAAN: 79.7259 deg

Eccentricy: 0.0032184

Argument of periapsis: 25.8692 deg

Mean anomaly: 334.3984 deg

Mean motion: 12.56242052 rev/day

Mean motion (dot): -0.00000051 rev/day2

B* drag term: -0.000039017 1/REarth

Two-line elements (TLE)

Creation date: May 11, 2025, 2:40 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: May 10, 2025, 5:41 p.m. UTC

TLE line 0: 0 ESSA 8 (TOS-F)

TLE line 1: 1 03615U 68114A 25130.73738320 -.00000051 00000-0 -39017-4 0 9991

TLE line 2: 2 03615 101.6477 79.7259 0032184 25.8692 334.3984 12.56242052586026

Live tracking on map

Real-time ground track for satellite ESSA 8 (TOS-F).

In-orbit conjunctions

There are no conjunctions computed for ESSA 8 (TOS-F), at the moment. Check back to stay up to date, as we update our databases every day.

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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 8 (TOS-F) was lifted into orbit during the mission ‘Thor Delta N | ESSA 8’, on board a Thor Delta N space rocket.

The launch took place on Dec. 15, 1968, 5:21 p.m. from Space Launch Complex 2E.

For more information about the launch, click the button.

Launch to space Thor Delta N | ESSA 8
Thor Delta N | ESSA 8

Agency: N/A

Status: Launch Successful

Launch date: Dec. 15, 1968, 5:21 p.m. UTC

Rocket: Thor Delta N

Launch pad: Space Launch Complex 2E

Location: Vandenberg SFB, CA, USA

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Latest news about this satellite

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