Key statistics
Satellite DELTA 2 R/B at a glance.
Uptime
9632
Days in orbit
Revolutions
≈ 14.5
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
96.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for DELTA 2 R/B.
Object identification
Identified? True
Debris? False
Object name: DELTA 2 R/B
International designator: 1999-008D
Object number (NORAD): 25637
Object ID (CCSDS): 25637
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 99.39 minutes
Inclination: 96.4568 deg
SMA: 7107.602 km
Apoapsis: 826.218 km
Periapsis: 632.716 km
RAAN: 159.7372 deg
Eccentricy: 0.0136123
Argument of periapsis: 270.0714 deg
Mean anomaly: 150.0504 deg
Mean motion: 14.48832246 rev/day
Mean motion (dot): 0.00000214 rev/day2
B* drag term: 0.000058359 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 10:26 p.m. UTC
TLE line 0: 0 DELTA 2 R/B
TLE line 1: 1 25637U 99008D 25188.93527110 .00000214 00000-0 58359-4 0 9992
TLE line 2: 2 25637 96.4568 159.7372 0136123 270.0714 150.0504 14.48832246390902
Live tracking on map
Real-time ground track for satellite DELTA 2 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object DELTA 2 R/B.
Associated space launch
ARGOS (Advanced Research & Global Observation Satellite) is a testbed and demonstration program for advanced remote sensing technologies for the US Air Force's Space Test Program (STP). ARGOS's primary objective is to fly and operate advanced payloads that include two technology demonstrations and seven experiment payloads for global and celestial observation. ARGOS also has a goal of three years of on orbit operations to demonstrate and collect science data for the Earth's global environment and top priority military space programs.
DELTA 2 R/B was lifted into orbit during the mission ‘Delta II | ARGOS’, on board a Delta II space rocket.
The launch took place on Feb. 23, 1999, 10:29 a.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta II | ARGOS
Agency: N/A
Status: Launch Successful
Launch date: Feb. 23, 1999, 10:29 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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