SSTL S1-4, 43618
Orbit data source: Space-Track
SSTL S1-4, 43618 is a payload satellite owned by SSTL (Astrium) (UK) in SSO that was launched on Sun, 16 Sep 2018 UTC via a PSLV launch vehicle from the Sirharikota (SRI). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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43618 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
UKRelated business
Manufacturer
SSTL (Astrium)
Mission
Operational Commercial Imaging
Bus & Motor
SSTL-300S1, Unknown motor
Mass
444 kg wet, 400 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Hept Cone + Cyl, 1.3 m
Radar Cross Section
2.356 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 SSTL S1-4
1 43618U 18071A 25258.75720181 .00000271 00000-0 28888-4 0 9990
2 43618 97.5393 136.0901 0001937 46.4255 313.7127 14.96177238381909Epoch: 2025-09-15T18:10Z
TLE epoch observation values (Epoch: 2025-09-15T18:10:22.236Z)
Latitude
-0.00005°
Longitude
-131.45982°
Altitude
580.844 km
Speed
7.571 km/s
True Right ascension
09h 04m 21s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
09:28:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
577.071 km
Perigee altitude
574.378 km
Semi-major axis
6,953.861 km
Eccentricity
0.00019
Inclination
97.5393°
RAAN
136.0901°
Arg. of periapsis
46.4255°
True anomaly
313.69665°
Mean anomaly
313.7127°
Eccentric anomaly
313.70468°
Mean motion
3.74286 °/min
Orbital period
96.18 mins
BSTAR
0.000028888
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Other satellites on launch #71 in the year 2018 (2018-09-16 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.SSTL S1-4 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-09-16 16:46:14.883Z | 216.549° SW | 2025-09-16 16:49:14.883Z | 270.595° WNW | 21.238° | 2025-09-16 16:52:14.883Z | 318.32° NNW |
| 6 mins | 2025-09-17 04:28:14.883Z | 35.2° NE | 2025-09-17 04:30:14.883Z | 96.611° ESE | 37.777° | 2025-09-17 04:34:14.883Z | 176.158° S |
| 5 mins | 2025-09-17 15:16:14.883Z | 115.286° SE | 2025-09-17 15:18:14.883Z | 70.829° E | 25.836° | 2025-09-17 15:21:14.883Z | 14.818° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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