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LEMUR-2-ZACHARY — Live Satellite Tracking (NORAD 42845)
Track LEMUR-2-ZACHARY (NORAD catalog number 42845) 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 W of 2017's 42nd orbital launch (COSPAR designation 2017-042W). It went up together with 15 other satellites from that launch still in the active catalog. As of this element set it had completed roughly 50,183 revolutions of Earth.
Moving at about 7.67 km/s, LEMUR-2-ZACHARY flies in low Earth orbit at an altitude of roughly 399 × 403 km, completing one revolution every 92.4 minutes — about 15.6 trips around Earth per day. The orbit is essentially circular (eccentricity 0.0004). Inclined 97.4° — nearly pole-to-pole — its ground track sweeps essentially every latitude. Its orbital plane crosses the equator northbound at right ascension 83.3°. Earth's equatorial bulge precesses that plane eastward about 1.03° per day, matching the Sun's apparent motion — which is what holds its lighting constant.
Orbital elements
| Orbit regime | low Earth orbit (LEO) |
|---|---|
| Perigee × apogee altitude | ~399 km × 403 km |
| Inclination | 97.35° |
| Orbital period | 92.4 min (15.58 rev/day) |
| Eccentricity | 0.00035 |
| Element set epoch | 2026-09-06 |
| COSPAR designation | 2017-042W |
| NORAD catalog number | 42845 |
This page's orbital elements come from the CelesTrak catalog of 2026-09-08. 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
LEMUR-2-ZACHARY is one of 4,471 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 LEMUR-2-ZACHARY from the ground?
Sometimes. Like most low-Earth-orbit spacecraft, LEMUR-2-ZACHARY 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 pass predictions for your location for when it is above your horizon and sunlit.
Related satellites
Nearest catalog neighbors of LEMUR-2-ZACHARY in the Other Active Satellites group — usually craft from the same or adjacent launches:
- NANOACE (NORAD 42844)
- CORVUS BC2 (NORAD 42846)
- CORVUS BC1 (NORAD 42847)
- LEMUR-2-DEMBITZ (NORAD 42842)
- LEMUR-2-PETERG (NORAD 42841)
- LEMUR-2-FURIAUS (NORAD 42840)
Browse the Other Active Satellites directory or the full satellite directory · What is a TLE? · WatchSat live globe