Key statistics
Satellite DELTA 2 R/B at a glance.
Uptime
9791
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: 99.374 minutes
Inclination: 96.4831 deg
SMA: 7106.805 km
Apoapsis: 827.274 km
Periapsis: 630.065 km
RAAN: 281.6508 deg
Eccentricy: 0.01387464
Argument of periapsis: 122.5866 deg
Mean anomaly: 303.5349 deg
Mean motion: 14.4907607 rev/day
Mean motion (dot): 0.00000547 rev/day2
B* drag term: 0.0001346618 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 4:50 p.m. UTC
TLE line 0: 0 DELTA 2 R/B
TLE line 1: 1 25637U 99008D 25347.70155799 .00000547 00000-0 13466-3 0 9992
TLE line 2: 2 25637 96.4831 281.6508 0138746 122.5866 303.5349 14.49076070413895
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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