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: 1 day ago
TLE from 1 day ago
0 GALILEO 21 (2C7)
1 43057U 17079C 26074.67446983 .00000030 00000-0 00000-0 0 9992
2 43057 55.1042 224.0749 0001896 348.4738 11.4697 1.70474575 51393Epoch: 2026-03-15T16:11Z
TLE epoch observation values (Epoch: 2026-03-15T16:11:14.193Z)
Latitude
-0°
Longitude
167.97805°
Altitude
23,216.887 km
Speed
3.67 km/s
True Right ascension
14h 56m 15s
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
21:30:58
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
23,227.733 km
Perigee altitude
23,216.509 km
Semi-major axis
29,600.258 km
Eccentricity
0.00019
Inclination
55.1042°
RAAN
224.0749°
Arg. of periapsis
348.4738°
True anomaly
11.47402°
Mean anomaly
11.4697°
Eccentric anomaly
11.47186°
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. |
|---|---|---|---|---|---|---|---|
| 146 mins | 2026-03-17 00:01:16.561Z | 323.83° NNW | 2026-03-17 01:12:16.561Z | 302.502° NW | 17.249° | 2026-03-17 02:27:16.561Z | 276.884° WNW |
| 462 mins | 2026-03-17 09:06:16.561Z | 183.151° SSW | 2026-03-17 12:23:16.561Z | 108.202° ESE | 44.963° | 2026-03-17 16:48:16.561Z | 90.688° ESE |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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