Key statistics
Satellite DELTA 1 R/B at a glance.
Uptime
21506
Days in orbit
Revolutions
≈ 12.7
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
101.9
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: 1967-006B
Object number (NORAD): 2661
Object ID (CCSDS): 2661
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 113.563 minutes
Inclination: 101.947 deg
SMA: 7768.156 km
Apoapsis: 1440.459 km
Periapsis: 1339.583 km
RAAN: 54.5932 deg
Eccentricy: 0.00649287
Argument of periapsis: 62.9506 deg
Mean anomaly: 352.7121 deg
Mean motion: 12.68019236 rev/day
Mean motion (dot): -0.00000044 rev/day2
B* drag term: 0.000017256616 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 4:20 a.m. UTC
TLE line 0: 0 DELTA 1 R/B
TLE line 1: 1 02661U 67006B 25346.18123410 -.00000044 00000-0 17257-4 0 9999
TLE line 2: 2 02661 101.9470 54.5932 0064929 62.9506 352.7121 12.68019236724456
Live tracking on map
Real-time ground track for satellite 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 E | ESSA 4’, on board a Thor Delta E space rocket.
The launch took place on Jan. 26, 1967, 5:31 p.m. from Space Launch Complex 2E.
For more information about the launch, click the button.
Thor Delta E | ESSA 4
Agency: N/A
Status: Launch Successful
Launch date: Jan. 26, 1967, 5:31 p.m. UTC
Rocket: Thor Delta E
Launch pad: Space Launch Complex 2E
Location: Vandenberg SFB, CA, USA
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