About S1-4
Group: 3 satellites
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Live Position
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Upcoming Passes
Altitude History
Altitude vs Time
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Two-Line Element Set
1 43618U 18071A 25326.90541229 .00000801 00000-0 75953-4 0 9991
2 43618 97.5283 201.6853 0002619 102.8438 257.3076 14.96195465392090
Epoch: Nov 22, 2025 •
Age: 4 hours
Current Status
Altitude 589.6 km
Velocity 7.57 km/s
Sub-Earth Point 74.78°N,
32.55°W
Launch Date Sep 16, 2018
Age 7.1 years
Type other
Technical Details
Classification Payload
Mass 444.00 kg
Dry Mass 400.00 kg
Total Mass 444.00 kg
Length 2.50 m
Diameter 1.00 m
Span 2.50 m
Shape Hept prism+cyl
Manufacturer SSTLA
Bus Type SSTL-300S1
Phase Status In Orbit
Owner/State SSTLA/UK
Large Constellations
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