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SDA-NG-T1TL-417 — Live Satellite Tracking (NORAD 100999)

Track SDA-NG-T1TL-417 (NORAD catalog number 100999) live on the WatchSat interactive 3D globe above. Its position is propagated in real time from the latest CelesTrak two-line element set using the SGP4/SDP4 orbital model — the same math professional trackers run. It is object S of 2026's 231st orbital launch (COSPAR designation 2026-231S). It went up together with 20 other satellites from that launch still in the active catalog.

Moving at about 7.39 km/s, SDA-NG-T1TL-417 flies in low Earth orbit at an altitude of roughly 943 × 955 km, completing one revolution every 103.9 minutes — about 13.9 trips around Earth per day. The orbit is essentially circular (eccentricity 0.0009). Inclined 81.5° — nearly pole-to-pole — its ground track sweeps essentially every latitude. Its orbital plane crosses the equator northbound at right ascension 190.8°. Earth's equatorial bulge drifts that plane westward about 0.91° per day.

Orbital elements

Orbit regime	low Earth orbit (LEO)
Perigee × apogee altitude	~943 km × 955 km
Inclination	81.50°
Orbital period	103.9 min (13.86 rev/day)
Eccentricity	0.00086
Element set epoch	2026-10-21
COSPAR designation	2026-231S
NORAD catalog number	100999

This page's orbital elements come from the CelesTrak catalog of 2026-10-23. The live 3D view above fetches its own current CelesTrak data when the page opens, through an edge cache that refreshes roughly every 30 minutes.

About the Other Active Satellites group

SDA-NG-T1TL-417 is one of 4,802 active satellites in WatchSat's general catalog — the broad population of Earth-observation, communications, science, amateur-radio and technology spacecraft outside the giant broadband constellations. Browse all other active satellites live in 3D.

Can you see SDA-NG-T1TL-417 from the ground?

Sometimes. Like most low-Earth-orbit spacecraft, SDA-NG-T1TL-417 is visible only around dawn and dusk, when your sky is dark but the satellite is still sunlit — and whether you can spot it depends on its size and reflectivity. See the “When can I see it?” panel in the live view for when it is above your horizon and sunlit.

Related satellites

Nearest catalog neighbors of SDA-NG-T1TL-417 in the Other Active Satellites group — usually craft from the same or adjacent launches:

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