GALILEO 21 (2C7), 43057
Orbit data source: Space-Track
GALILEO 21 (2C7), 43057 is a payload satellite owned by GNSS Agency (ESA) that was launched on Tue, 12 Dec 2017 UTC via an ARIANE 5ES launch vehicle from the French Guiana (FRGUI). 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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43057 intel report (Beta)
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Identifier
Orbit
Country
ESARelated business
Manufacturer
OHB
Mission
Operational Civil Navigation
Bus & Motor
GALILEOSAT, AOCS
Mass
715 kg wet, 700 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 7.3 m
Radar Cross Section
9.223 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 days ago
TLE from 6 days ago
0 GALILEO 21 (2C7)
1 43057U 17079C 26167.35438370 .00000047 00000-0 00000-0 0 9999
2 43057 55.0717 221.5274 0004985 283.8791 76.1632 1.70474228 52976Epoch: 2026-06-16T08:30Z
TLE epoch observation values (Epoch: 2026-06-16T08:30:18.751Z)
Latitude
0°
Longitude
-170.66343°
Altitude
23,218.89 km
Speed
3.67 km/s
True Right ascension
14h 46m 10s
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
21:42:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
23,236.918 km
Perigee altitude
23,207.407 km
Semi-major axis
29,600.299 km
Eccentricity
0.0005
Inclination
55.0717°
RAAN
221.5274°
Arg. of periapsis
283.8791°
True anomaly
76.21867°
Mean anomaly
76.1632°
Eccentric anomaly
76.19094°
Mean motion
0.42619 °/min
Orbital period
844.7 mins
BSTAR
0
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Other satellites on launch #79 in the year 2017 (2017-12-12 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.GALILEO 21 (2C7) 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. |
|---|---|---|---|---|---|---|---|
| 124 mins | 2026-06-22 10:40:30.619Z | 83.932° E | 2026-06-22 10:40:30.619Z | 83.932° E | 33.775° | 2026-06-22 12:44:30.619Z | 124.01° SE |
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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