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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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<iframe src="https://www.satcat.com/sats-embedded/43618?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/43618?theme=dark&initialShowStats=false

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Identifier

43618, 2018-071A

Orbit

SSO

Country

Related business

Airbus Defense and Space (FR)

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 (8 years ago)

Launch vehicle

PSLV

Launch site

Sirharikota (SRI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hept Cone + Cyl, 1.3 m

Radar Cross Section

2.356 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 SSTL S1-4
1 43618U 18071A   26080.67799727  .00000761  00000-0  72444-4 0  9998
2 43618  97.5166 315.8667 0002356  99.1681 260.9807 14.96149830409857

Epoch: 2026-03-21T16:16Z

TLE epoch observation values (Epoch: 2026-03-21T16:16:18.964Z)

Latitude

-0.00005°

Longitude

-107.40758°

Altitude

582.118 km

Speed

7.569 km/s

True Right ascension

21h 03m 28s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

02:56:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

577.447 km

Perigee altitude

574.17 km

Semi-major axis

6,953.946 km

Eccentricity

0.00024

Inclination

97.5166°

RAAN

315.8667°

Arg. of periapsis

99.1681°

True anomaly

260.95404°

Mean anomaly

260.9807°

Eccentric anomaly

260.96737°

Mean motion

3.7428 °/min

Orbital period

96.18 mins

BSTAR

0.000072444

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Other satellites on launch #71 in the year 2018 (2018-09-16 UTC)

NOVASAR 1, 43619

PSLV R/B, 43620

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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.
7 mins	2026-03-23 04:08:43.242Z	23.022° NE	2026-03-23 04:12:43.242Z	107.335° ESE	37.799°	2026-03-23 04:15:43.242Z	172.689° S
5 mins	2026-03-23 14:58:43.242Z	112.828° SE	2026-03-23 15:00:43.242Z	66.029° ENE	25.825°	2026-03-23 15:03:43.242Z	13.342° NNE
4 mins	2026-03-23 16:34:43.242Z	242.86° WSW	2026-03-23 16:35:43.242Z	262.649° W	19.205°	2026-03-23 16:38:43.242Z	312.679° NW

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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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Check out SSTL S1-4, 43618 on other resources

View SSTL S1-4, 43618 on NASA - NSSDCA Website

View SSTL S1-4, 43618 on Heavens-Above

View SSTL S1-4, 43618 on Keep Track

View SSTL S1-4, 43618 on Celestrak

View SSTL S1-4, 43618 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

SSTL S1-4, 43618

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-03-21T16:16:18.964Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #71 in the year 2018 (2018-09-16 UTC)

SSTL S1-4 Visibility forecast

Co-orbital & Co-planar RSOs

Check out SSTL S1-4, 43618 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago