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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Edit Public Description
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, 7.4 m
Radar Cross Section
9.223 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 GALILEO 21 (2C7)
1 43057U 17079C 25256.66053889 .00000037 00000-0 00000-0 0 9998
2 43057 55.1629 229.1122 0003859 292.6338 67.2994 1.70473914 48270Epoch: 2025-09-13T15:51Z
TLE epoch observation values (Epoch: 2025-09-13T15:51:10.56Z)
Latitude
-0.00003°
Longitude
-1.58095°
Altitude
23,218.062 km
Speed
3.67 km/s
True Right ascension
15h 16m 24s
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
21:34:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
23,233.618 km
Perigee altitude
23,210.773 km
Semi-major axis
29,600.333 km
Eccentricity
0.00039
Inclination
55.1629°
RAAN
229.1122°
Arg. of periapsis
292.6338°
True anomaly
67.3402°
Mean anomaly
67.2994°
Eccentric anomaly
67.3198°
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. |
|---|---|---|---|---|---|---|---|
| 357 mins | 2025-09-15 23:00:44.120Z | 203.828° SW | 2025-09-16 02:42:44.120Z | 320.186° NNW | 44.086° | 2025-09-16 04:57:44.120Z | 68.909° E |
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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