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, 7.3 m
Radar Cross Section
9.223 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 3 days ago
TLE from 3 days ago
0 GALILEO 21 (2C7)
1 43057U 17079C 25287.16292897 -.00000021 00000-0 00000-0 0 9995
2 43057 55.1514 228.2743 0003456 307.4063 52.5457 1.70473747 48797Epoch: 2025-10-14T03:54Z
TLE epoch observation values (Epoch: 2025-10-14T03:54:37.063Z)
Latitude
-0°
Longitude
146.6504°
Altitude
23,216.26 km
Speed
3.67 km/s
True Right ascension
15h 13m 02s
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
21:40:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
23,232.445 km
Perigee altitude
23,211.985 km
Semi-major axis
29,600.352 km
Eccentricity
0.00035
Inclination
55.1514°
RAAN
228.2743°
Arg. of periapsis
307.4063°
True anomaly
52.57715°
Mean anomaly
52.5457°
Eccentric anomaly
52.56142°
Mean motion
0.42618 °/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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 409 mins | 2025-10-17 03:48:45.200Z | 292.142° WNW | 2025-10-17 07:30:45.200Z | 261.507° W | 43.708° | 2025-10-17 10:37:45.200Z | 191.645° SSW |
| 227 mins | 2025-10-17 16:26:45.200Z | 108.326° ESE | 2025-10-17 18:21:45.200Z | 67.765° E | 26.16° | 2025-10-17 20:13:45.200Z | 36.963° NE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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