Space Brief 20 Mar 2025
Today's brief highlights critical discussions in military space readiness, potential satellite 'dogfighting' scenarios, international defense collaborations, and a notable communications satellite launch.
ONEWEB-0300 (49089)
COSPAR: 2021-075Q | Alt Name: OneWeb SL0300
Image
Additional Sources
Launch Details
Launch Date
August 21, 2021
Launch Site
Launch Pad
LC31
Launch Vehicle
Soyuz-2-1B
Orbital Elements
NORAD ID
49089
International Designator
2021-075Q
Epoch
Sat, 04 Jul 2026 04:21:16 GMT
Apogee
Calculating...
Perigee
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Inclination
87.90°
Right Ascension
347.28°
Eccentricity
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Argument of Perigee
85.64°
Period
109.72 min
Mean Motion
13.12 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
ONEWEB-0300
Alternative Name
OneWeb SL0300
Type
Payload
Status
Operational
Owner
ONEWEBN
Country
United Kingdom
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 49089U 21075Q 26185.18143609 -.00000160 00000-0 -48054-3 0 9992
2 49089 87.8966 347.2777 0001503 85.6433 274.4867 13.12443058237439
Source: Celestrak
Summary
The ONEWEB-0300 satellite, also known as OneWeb SL0300, is a communication satellite owned by OneWebN and manufactured by Onewus in the UK. It was launched on August 21, 2021, from TYMSC LC31 using a Soyuz-2-1B launch vehicle and achieved stability one day later. The satellite uses an Arrow bus configuration with dimensions of 1.3 meters in length, 1 meter in diameter, and has a span of 5 meters. It is equipped with a Ku-Band payload for communication purposes and powered by solar arrays and batteries. Its dry mass is 140 kilograms, and it had a launch mass of 148 kilograms. The satellite is designed to operate for approximately seven years and uses SPT-50 or BHT-350 Hall effect thrusters as its propulsion system. Its shape consists of a trapezoid with two panels attached.
Physical Characteristics
Length
1.3
Diameter
1
Span
5
Dry Mass
140
Launch Mass
148
Shape
Trapezoid+2 pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
OneWeb L9-011
Purpose
Communication
Mission
Communication
Manufacturer
ONEWUS
Life Expectancy
+ 7 years
Bus
ARROW
Configuration
Arrow bus
Motor
SPT-50 or BHT-350 Hall effect thrusters
Equipment
Ku-Band payload
Power System
solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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