Key statistics
Satellite DELTA 1 R/B at a glance.
Uptime
20771
Days in orbit
Revolutions
≈ 12.5
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
101.7
Latest
Satellite identification and parameters
Extended collection of information and parameters for DELTA 1 R/B.
Object identification
Identified? True
Debris? False
Object name: DELTA 1 R/B
International designator: 1968-114B
Object number (NORAD): 3616
Object ID (CCSDS): 3616
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 115.071 minutes
Inclination: 101.6526 deg
SMA: 7836.793 km
Apoapsis: 1469.392 km
Periapsis: 1447.924 km
RAAN: 246.6479 deg
Eccentricy: 0.00136971
Argument of periapsis: 111.9313 deg
Mean anomaly: 61.8038 deg
Mean motion: 12.513972 rev/day
Mean motion (dot): -0.00000011 rev/day2
B* drag term: 0.0002118799 1/REarth
Two-line elements (TLE)
Creation date: Oct. 28, 2025, 2:18 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 27, 2025, 2:15 p.m. UTC
TLE line 0: 0 DELTA 1 R/B
TLE line 1: 1 03616U 68114B 25300.59433378 -.00000011 00000-0 21188-3 0 9994
TLE line 2: 2 03616 101.6526 246.6479 0013697 111.9313 61.8038 12.51397200599506
Live tracking on map
Real-time ground track for satellite DELTA 1 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object DELTA 1 R/B.
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).
DELTA 1 R/B 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.
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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