PRAETORIAN SDA_613
launched 2025low orbitNORAD 65576 · 2025-203M
- Height
- 954.9 km
- From center
- 7,324.7 km
- Sunlight
- In shadow
- Speed
- 7.380 km/s
- Ground speed
- 6.358 km/s
- Over
- 38.738° N, 0.869° W
Passes
Known downlinks
- 2,225.677 MHz, S-band telemetry, UNKNOWN
From SatNOGS DB (CC BY-SA 4.0), contributed by listeners and not checked by SeekSat. Some may be off the air.
Elements are 1.1 days old, from CelesTrak GP data (groups: active), fetched 10 h ago.
Technical details
Mean elements
Elements are 1.1 days old, from CelesTrak GP data (groups: active), fetched 10 h ago.How accurate is this?
- Perigee
- 947 km
- Apogee
- 956 km
- Period
- 104.08 min
- Inclination
- 81.30°
- Eccentricity
- 0.0006167
- Semi-major axis
- 7,329.4 km
- Epoch
- 2026-11-14T20:34:09Z
Orbit check
The live speed and distance fit this orbit to within 0.025%.
Vis-viva: v²r/GM = 1.0009 and 2 − r/a = 1.0006
Raw elements
2LE
1 65576U 25203M 26318.85705524 .00000139 00000+0 11679-3 0 9996 2 65576 81.3007 231.6740 0006167 136.0564 224.1083 13.82777449 59509
3LE
PRAETORIAN SDA_613 1 65576U 25203M 26318.85705524 .00000139 00000+0 11679-3 0 9996 2 65576 81.3007 231.6740 0006167 136.0564 224.1083 13.82777449 59509
OMM
{
"OBJECT_NAME": "PRAETORIAN SDA_613",
"OBJECT_ID": "2025-203M",
"EPOCH": "2026-11-14T20:34:09.573600",
"MEAN_MOTION": 13.82777449,
"ECCENTRICITY": 0.00061671,
"INCLINATION": 81.3007,
"RA_OF_ASC_NODE": 231.674,
"ARG_OF_PERICENTER": 136.0564,
"MEAN_ANOMALY": 224.1083,
"EPHEMERIS_TYPE": 0,
"CLASSIFICATION_TYPE": "U",
"NORAD_CAT_ID": 65576,
"ELEMENT_SET_NO": 999,
"REV_AT_EPOCH": 5950,
"BSTAR": 0.00011679095,
"MEAN_MOTION_DOT": 0.00000139,
"MEAN_MOTION_DDOT": 0
}How we compute these
- Altitude
- Height above the WGS84 ellipsoid, the standard model of Earth's shape, straight below the satellite.
- Speed
- The length of SGP4's velocity vector in the TEME frame: the inertial speed. It is not the speed over the ground.
- Ground speed
- How fast the point below the satellite moves across Earth's surface, with Earth's rotation taken out.
- From Earth's center
- Distance from Earth's center, from SGP4's position.
- Latitude and longitude
- The point on the WGS84 ellipsoid straight below the satellite, from SGP4's position turned into Earth-fixed coordinates.
- Sunlight
- How much sunlight reaches the satellite past Earth and its atmosphere. Light grazing Earth is dimmed by air and ozone, bent into the shadow by refraction, and blocked below 10 km (clouds and haze); the Sun's disc is darker at its edge. So the satellite fades over a few seconds in low orbit and a couple of minutes in geostationary orbit, reddening as it goes, rather than switching off. The atmosphere is a clear standard one: haze from a large volcanic eruption can make the real fade come a few seconds early.
- Orbit check (vis-viva)
- v²r/GM uses the live speed and distance above, with GM = 398,600.4418 km³/s². Vis-viva says it equals 2 − r/a, where a is the mean semi-major axis. They agree as closely as SGP4's mean elements allow, usually within 1%.
- Mean elements
- Perigee, apogee, period, eccentricity, inclination and semi-major axis are mean elements from the published set, not instantaneous values. Perigee and apogee heights are above Earth's equatorial radius (6,378 km).
- Epoch
- The epoch is the moment the element set describes. Positions get less accurate the further you are from it.
- How accurate is this?
- Positions are predictions from the published elements, not live tracking. Through SGP4 they are usually within a kilometre or two near the epoch and drift by a few km a day after it, more for low or manoeuvring satellites. The map shows ground positions, the point straight below the satellite, so dots that look close can be thousands of km apart in height. Good for passes and tracks; not for judging close approaches between objects.