Space Brief 2 Nov 2025
Today's briefing covers India's military communications satellite launch, SpaceX's Starlink mission milestone, Latvia's agreement to the Artemis Accords, and more significant updates in space technology and satellite launches.
ONEWEB-0399 (50479)
COSPAR: 2021-132L | Alt Name: OneWeb SL0399
Image
Additional Sources
Launch Details
Launch Date
December 27, 2021
Launch Site
Launch Pad
LC31
Launch Vehicle
Soyuz-2-1B
Orbital Elements
NORAD ID
50479
International Designator
2021-132L
Epoch
Sun, 19 Jul 2026 11:18:23 GMT
Apogee
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Perigee
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Inclination
87.89°
Right Ascension
14.64°
Eccentricity
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Argument of Perigee
81.04°
Period
109.80 min
Mean Motion
13.11 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
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Basic Satellite Info
Name
ONEWEB-0399
Alternative Name
OneWeb SL0399
Type
Payload
Status
Operational
Owner
ONEWEBN
Country
United Kingdom
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 50479U 21132L 26200.47110737 .00000558 00000+0 15399-2 0 9990
2 50479 87.8892 14.6422 0001452 81.0424 279.0869 13.11417573219836
Source: Celestrak
Summary
The ONEWEB-0399 satellite, also known as OneWeb SL0399, is a communication satellite built by ONEWUS for the UK company ONWEWN. It was launched on December 27, 2021, from the TYMSC launch site using a Soyuz-2-1B rocket from Launch Pad LC31. The spacecraft has dimensions of 1.3 meters in length and a diameter of 1 meter with a span of 5 meters. It weighs 148 kilograms at launch and has a dry mass of 140 kilograms, powered by solar arrays and batteries. Equipped with a Ku-Band payload, the satellite is designed to operate for up to seven years as part of its communication mission. The bus configuration is Arrow, utilizing SPT-50 or BHT-350 Hall effect thrusters for propulsion.
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 L12-036
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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