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Object D

In orbit NORAD 51827 CQOD-6844-7035-7264-5887 China

Observations 42
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2022

Launch

42

Observations all time

Mission information
Spacecraft name
Object D
Status
Active
The satellite is in orbit
The network has not received data from this satellite for a long time
Launch and timeline
Launch time
2022-02-17 00:00:00
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
128.56 km
Apogee
146.01 km
Inclination
97.3°
Period
87.3 min
Semi-major axis
6515.4 km
Velocity
7.88 km/s
Orbital elements
TLE source
Space-Track.org
TLE updated
2026-10-15 02:09:06 UTC
Two-line elements (TLE)
1 51827U 22019D   26287.57383374  .13930692  25609-5  15891-3 0  9999
2 51827  97.3344  29.2474 0013385 269.8425  90.1346 16.49560912258628
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Orbit history, past year

Mean elements of every TLE set over the past 365 days, plotted against the epoch of the set. Each source is its own line; click it in the legend to hide it. A jump in altitude is a manoeuvre or a bad set; lines drifting apart are a disagreement between sources. “TLE age” is how many hours have passed since the epoch of the source's freshest set, plotted against when the set reached us, on a logarithmic scale. A set the source repeats unchanged does not reset the age.

Prediction divergence

Each TLE set is propagated with SGP4 to the epoch of the next set from the same source and compared with it, plotted against the epoch of the next set; the tooltip shows how many hours ahead the prediction ran. The logarithmic scale shows the size of the divergence and the tooltip its sign: plus along-track means the prediction is ahead of the satellite. This is how well the sets agree, not the true error: the reference is a TLE too, off by about a kilometre. An outlier is a manoeuvre between sets. Sets more than a week apart are not compared.