Key statistics
Satellite DELTA 2 R/B at a glance.
Uptime
9694
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: 99.387 minutes
Inclination: 96.4651 deg
SMA: 7107.425 km
Apoapsis: 828.443 km
Periapsis: 630.138 km
RAAN: 207.24 deg
Eccentricy: 0.01395053
Argument of periapsis: 72.3981 deg
Mean anomaly: 346.0244 deg
Mean motion: 14.48886331 rev/day
Mean motion (dot): 0.00000819 rev/day2
B* drag term: 0.00019846921 1/REarth
Two-line elements (TLE)
Creation date: Sept. 8, 2025, 3:16 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 7, 2025, 9:12 p.m. UTC
TLE line 0: 0 DELTA 2 R/B
TLE line 1: 1 25637U 99008D 25250.88395725 .00000819 00000-0 19847-3 0 9990
TLE line 2: 2 25637 96.4651 207.2400 0139505 72.3981 346.0244 14.48886331399879
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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