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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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Identifier
43618, 2018-071A
Orbit
SSO
Last TLE update
8 hours ago
Origin
Manufacturer
SSTL (Astrium)
Mission
Operational Commercial Imaging
Bus & Motor
SSTL-300S1, Unknown motor
Mass
444 kg wet, 400 kg dry
Launch date (UTC)
2018-09-16 (7 years ago)
Launch vehicle
PSLV
Launch site
Sirharikota (SRI)
Object type
Payload
Rocket body
Debris
Shape & HBR
Hept Cone + Cyl, 2.5 m
Radar Cross Section
2.356 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 8 hours ago
0 SSTL S1-4
1 43618U 18071A   25184.18941550  .00000650  00000-0  62528-4 0  9990
2 43618  97.5525  64.1985 0001205 194.1628 165.9560 14.96198453370753
Epoch: 2025-07-03T04:32Z
TLE epoch observation values (Epoch: 2025-07-03T04:32:45.499Z)
Latitude
-0.00002°
Longitude
74.54919°
Altitude
582.523 km
Speed
7.569 km/s
True Right ascension
04h 16m 47s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
81.73805°
Longitude
-39.8667°
Altitude
592.288 km
Speed
7.571 km/s
Apparent Right ascension
13h 31m 15s
Apparent Declination
31° 53' 01"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
00:46:00
Azimuth
349.945° N
Elevation
-17.439°
Doppler factor
1
Orbital elements
Apogee altitude
576.497 km
Perigee altitude
574.821 km
Semi-major axis
6,953.796 km
Eccentricity
0.00012
Inclination
97.5525°
RAAN
64.1985°
Arg. of periapsis
194.1628°
True anomaly
Unknown
Mean anomaly
165.956°
Eccentric anomaly
Unknown
Mean motion
3.74292 °/min
Orbital period
96.18 mins
BSTAR
0.000062528
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Other satellites on launch #71 in the year 2018 (2018-09-16 UTC)

SSTL S1-4 Visibility forecast

Observer location: undefined°, undefined°

Span
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Start Az.
Max El. time (UTC)
Max El. Az.
Max El.
End time (UTC)
End Az.
7 mins2025-07-03 15:54:15.149Z158.853° S2025-07-03 15:57:15.149Z125.989° SE41.671°2025-07-03 16:01:15.149Z353.14° N
6 mins2025-07-04 05:12:15.149Z353.333° N2025-07-04 05:14:15.149Z296.831° NW38.978°2025-07-04 05:18:15.149Z208.781° SW
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