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TRITON-1

In orbit NORAD 39427 APZD-5343-3708-9744-3445 United Kingdom Netherlands

Observations 9
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2013

Launch

9

Observations all time

Mission information
Spacecraft name
TRITON-1
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
2013-11-21 00:00:00
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
558.05 km
Apogee
681.32 km
Inclination
97.8°
Period
97.2 min
Semi-major axis
6997.8 km
Velocity
7.48 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-10 20:56:55 UTC
Two-line elements (TLE)
1 39427U 13066M   26283.55501015  .00000908  00000-0  11359-3 0  9993
2 39427  97.8149 190.6954 0088122 217.3885 142.1176 14.82117565691170
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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.

Time of closest approach, UTC Object 1 Object 2 Distance, km Speed, km/s Max. probability
2026-10-11 00:15:22 TRITON-1
NORAD 39427 		REPLICATOR 2
NORAD 69927 		4.793 1.08 1.9e-07
2026-10-11 18:12:35 TRITON-1
NORAD 39427 		FENGYUN 1C DEB
NORAD 31768 		4.759 14.42 8.4e-08
2026-10-12 08:31:57 TRITON-1
NORAD 39427 		STARLINK-5819
NORAD 55780 		3.806 14.72 3.7e-06
2026-10-13 18:33:02 TRITON-1
NORAD 39427 		STARLINK-35837
NORAD 66840 		2.621 7.09 1.7e-05
2026-10-14 10:15:57 TRITON-1
NORAD 39427 		GEESAT-4 10
NORAD 65128 		4.308 11.89 1.6e-07
2026-10-14 12:20:50 TRITON-1
NORAD 39427 		STARLINK-5812
NORAD 55774 		1.583 14.90 2.0e-05
2026-10-14 18:59:19 TRITON-1
NORAD 39427 		ION SCV-023
NORAD 69876 		4.474 1.27 2.2e-07
2026-10-15 11:11:42 TRITON-1
NORAD 39427 		TOM-2
NORAD 69914 		2.635 1.10 6.3e-07
2026-10-15 15:16:07 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		4.557 15.04 1.7e-07
2026-10-15 16:53:23 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.701 15.04 2.6e-07
2026-10-15 18:30:40 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.170 15.05 3.5e-07
2026-10-15 20:07:56 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.024 15.05 3.8e-07
2026-10-15 21:45:13 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.222 15.05 3.4e-07
2026-10-15 22:20:12 TRITON-1
NORAD 39427 		STARLINK-5557
NORAD 55770 		3.669 14.98 3.6e-06
2026-10-15 23:11:26 TRITON-1
NORAD 39427 		DMSP 5D-2 F13 DEB
NORAD 42308 		3.942 14.57 1.1e-07
2026-10-15 23:22:29 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.638 15.05 2.7e-07
2026-10-16 00:59:46 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		4.153 15.05 2.0e-07
2026-10-16 02:37:03 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		4.695 15.05 1.6e-07
2026-10-16 05:05:55 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 19275 		1.563 15.06 1.4e-06
2026-10-16 06:08:14 TRITON-1
NORAD 39427 		FENGYUN 1C DEB
NORAD 32176 		2.813 14.97 2.0e-07
2026-10-16 06:43:02 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 19275 		4.231 15.06 2.0e-07
2026-10-16 10:42:35 TRITON-1
NORAD 39427 		YINHE-1
NORAD 45024 		4.074 13.94 1.3e-07
2026-10-16 19:38:08 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		4.463 15.08 1.8e-07
2026-10-16 21:15:24 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		3.342 15.08 3.1e-07
2026-10-16 22:52:41 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		2.122 15.08 7.8e-07
2026-10-17 00:29:57 TRITON-1
NORAD 39427 		SL-14 R/B
NORAD 23659 		0.825 15.08 5.1e-06

Data: CelesTrak SOCRATES Plus, computed from TLEs of the public catalog. This is an estimate, not grounds for a manoeuvre: TLEs carry no covariance, and the maximum probability assumes a position error.

All conjunctions of this satellite