Key statistics
Satellite DELTA 1 R/B(1) at a glance.
Uptime
17643
Days in orbit
Revolutions
≈ 12.5
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
27.1
Latest
Satellite identification and parameters
Extended collection of information and parameters for DELTA 1 R/B(1).
Object identification
Identified? True
Debris? False
Object name: DELTA 1 R/B(1)
International designator: 1977-080B
Object number (NORAD): 10295
Object ID (CCSDS): 10295
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 115.375 minutes
Inclination: 27.0899 deg
SMA: 7850.578 km
Apoapsis: 2074.049 km
Periapsis: 870.838 km
RAAN: 189.1995 deg
Eccentricy: 0.07663202
Argument of periapsis: 123.3715 deg
Mean anomaly: 244.2489 deg
Mean motion: 12.48102603 rev/day
Mean motion (dot): 0.00000148 rev/day2
B* drag term: 0.00015699013 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, 5:28 a.m. UTC
TLE line 0: 0 DELTA 1 R/B(1)
TLE line 1: 1 10295U 77080B 25346.22842693 .00000148 00000-0 15699-3 0 9991
TLE line 2: 2 10295 27.0899 189.1995 0766320 123.3715 244.2489 12.48102603180797
Live tracking on map
Real-time ground track for satellite DELTA 1 R/B(1).
In-orbit conjunctions
A list of the most updated potential collisions computed for object DELTA 1 R/B(1).
Associated space launch
The SIRIO satellite is an experimental geostationary artificial telecommunications satellite, the first to be designed and built in Italy.
DELTA 1 R/B(1) was lifted into orbit during the mission ‘Delta 2313 | Sirio 1’, on board a Delta 2313 space rocket.
The launch took place on Aug. 25, 1977, 11:49 p.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Delta 2313 | Sirio 1
Agency: N/A
Status: Launch Successful
Launch date: Aug. 25, 1977, 11:49 p.m. UTC
Rocket: Delta 2313
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
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