KEPLER-21, 56218
Orbit data source: Space-Track
KEPLER-21, 56218 is a payload satellite owned by Kepler Comms (CA) in SSO that was launched on Sat, 15 Apr 2023 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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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Identifier
Orbit
Country
CARelated business
Manufacturer
KEPLER/UTIAS
Mission
Operational Commercial Communications
Bus & Motor
CUBESAT 6U, Unknown motor
Mass
15 kg wet, 15 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 0.3 m
Radar Cross Section
0.109 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 KEPLER-21
1 56218U 23054AS 26049.25835158 .00060389 00000-0 50116-3 0 9996
2 56218 97.2992 322.1942 0006887 90.5799 269.6253 15.69990813160420Epoch: 2026-02-18T06:12Z
TLE epoch observation values (Epoch: 2026-02-18T06:12:01.576Z)
Latitude
0.00002°
Longitude
80.96105°
Altitude
362.118 km
Speed
7.692 km/s
True Right ascension
21h 28m 46s
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
22:34:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
360.456 km
Perigee altitude
351.181 km
Semi-major axis
6,733.955 km
Eccentricity
0.00069
Inclination
97.2992°
RAAN
322.1942°
Arg. of periapsis
90.5799°
True anomaly
269.54638°
Mean anomaly
269.6253°
Eccentric anomaly
269.58584°
Mean motion
3.9277 °/min
Orbital period
91.66 mins
BSTAR
0.00050116
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Other satellites on launch #54 in the year 2023 (2023-04-15 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.KEPLER-21 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-02-19 07:13:25.464Z | 358.274° N | 2026-02-19 07:15:25.464Z | 315.976° NNW | 33.868° | 2026-02-19 07:18:25.464Z | 210.049° SW |
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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