Space Brief 13 Aug 2025
Today's Space Brief covers the inaugural national security mission of ULA's Vulcan Centaur, the Space Force's 2026 budget insights, and shifts in military drone technology.
ONEWEB-0427 (50499)
COSPAR: 2021-132AG | Alt Name: OneWeb SL0427
Image
Additional Sources
Launch Details
Launch Date
December 27, 2021
Launch Site
Launch Pad
LC31
Launch Vehicle
Soyuz-2-1B
Orbital Elements
NORAD ID
50499
International Designator
2021-132AG
Epoch
Sun, 19 Jul 2026 19:52:07 GMT
Apogee
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Perigee
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Inclination
87.92°
Right Ascension
328.95°
Eccentricity
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Argument of Perigee
93.36°
Period
109.20 min
Mean Motion
13.19 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-0427
Alternative Name
OneWeb SL0427
Type
Payload
Status
Operational
Owner
ONEWEBN
Country
United Kingdom
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 50499U 21132AG 26200.82786616 .00000016 00000+0 68877-5 0 9997
2 50499 87.9203 328.9460 0001797 93.3630 266.7707 13.18686821225916
Source: Celestrak
Summary
The ONEWEB-0427 satellite, also known as OneWeb SL0427, is owned by OneWebN and manufactured by ONEWUS in the UK. It was launched on December 27, 2021, from TYMSC launch site using Soyuz-2-1B launch vehicle at LC31 pad. The satellite measures 1.3 meters in length with a diameter of 1 meter and has a span of 5 meters when its solar arrays are deployed. Its dry mass is 140 kg while the total launch mass was 148 kg. It features a Ku-Band payload for communication purposes, powered by solar arrays and batteries, and utilizes SPT-50 or BHT-350 Hall effect thrusters as motors. The satellite has a trapezoid shape with two panels and is designed to operate for seven years in its mission to enhance global communication networks.
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 L12-002
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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