EARENDIL-1 Passes
Over Johannesburg
Predicted pass geometry, viewing conditions, and beam footprint data for Johannesburg when EARENDIL-1 — the first commercial orbital mirror — launches in mid-2026. From 26.2°S on the Highveld at 1,753m altitude (Africa's highest-altitude major city), EARENDIL-1 reaches up to ~76° peak elevation — nearly at the zenith. The combination of low latitude and altitude gives Johannesburg one of Africa's best-positioned locations for orbital mirror viewing. Passes rise in the NW and transit toward the NE, opposite to the direction seen from northern-hemisphere observers.
What to Expect in Johannesburg
What EARENDIL-1 Will Look Like from Johannesburg
From Johannesburg, EARENDIL-1 passes will appear as a fast-moving point of light crossing the sky in approximately 3–4 minutes. At peak brightness it will reach magnitude ~−4 — comparable to Venus at maximum. The combination of 76° near-zenith peak elevation and 1,753m altitude thinning the atmosphere makes Johannesburg one of the visually best-positioned African cities for orbital mirror viewing. Winter passes are particularly striking against the deep blue Highveld twilight.
The mirror is steerable — between targeted commercial passes, Reflect Orbital tilts it away from Earth, making it much dimmer or invisible. During an active commercial pass you'll see a sudden brightening as the beam angle locks onto the target region. The pass ends abruptly when the mirror tilts away again.
Unlike a steady satellite, EARENDIL-1 may show subtle brightness variations as the mirror adjusts its aim. Watch for a brief period of maximum brightness near the peak of the pass when the geometry is optimal — this is when the 5km ground footprint is directly beneath the mirror at closest approach.
Track EARENDIL-1 from Johannesburg at Launch
OrbitalNodes.ai will provide real-time pass predictions for Johannesburg from the moment EARENDIL-1's orbital data is published. No app download required — runs entirely in your browser with GPS-accurate directions.
◈ OPEN ORBITALNODES.AISpace Mirror Questions — Johannesburg
How bright will EARENDIL-1 appear from Johannesburg?
At peak overhead passes, EARENDIL-1 is designed to reach magnitude ~−4 — comparable to Venus at maximum brightness. Johannesburg's 76° near-zenith peak elevation combined with 1,753m altitude (measurably thinner atmosphere than sea-level cities) gives exceptional apparent brightness. It is easily visible from Constitution Hill, Sandton, or any elevated northern-suburbs location despite Bortle 7–8 urban light pollution. Between commercial illumination passes, Reflect Orbital tilts the mirror away from Earth, reducing brightness significantly.
How high will EARENDIL-1 appear from Johannesburg?
From 26.2°S on the South African Highveld, EARENDIL-1 can reach ~76° elevation on the best passes — near the zenith. Passes rise in the NW and transit toward the NE, opposite to the direction seen from northern-hemisphere observers. Johannesburg's latitude is comparable to Rockhampton (Australia) and central Paraguay. Combined with the altitude advantage at 1,753m, Johannesburg offers one of Africa's best urban viewing conditions.
When is the best time to see it from Johannesburg?
May through August is Johannesburg's dry winter season — crystal-clear evenings with excellent transparency, known locally as "bluebird" weather. Winter nights are cold but rewarded with pristine skies. Summer (October–April) brings spectacular afternoon thunderstorms that typically clear by evening. March and September are reliable transitional seasons.
Will the beam footprint hit Johannesburg?
A 5km beam footprint could span from the Johannesburg CBD through Hillbrow and onto Berea — covering the dense inner city. Alternatively, a beam over Sandton could illuminate the Gautrain station, Nelson Mandela Square, and the major corporate towers simultaneously — Sandton is often cited as Africa's richest square mile. A pass targeting Soweto's Vilakazi Street (the only street in the world to have housed two Nobel Peace Prize laureates, Nelson Mandela and Desmond Tutu) would carry significant symbolic weight. Whether any specific location falls in the footprint depends on Reflect Orbital's commercial contracts and targeting decisions.
Is EARENDIL-1 visible yet?
No — EARENDIL-1 has not launched yet. Reflect Orbital is targeting a mid-2026 launch. There is currently no space mirror in Earth orbit. OrbitalSolar.ai will update with live pass data from the moment orbital elements are published after launch. Check the mission tracker for current launch status.
Why does the mirror move differently from Johannesburg than from other cities?
From the Southern Hemisphere at 26.2°S, EARENDIL-1 rises in the NW and transits toward the NE — opposite to the direction seen from northern cities. This is because Johannesburg is south of the equator, so sun-synchronous satellites approach from the polar direction opposite to northern-hemisphere observers. Pass geometry is similar to Brisbane (27.5°S) and São Paulo (23.5°S).
How does Johannesburg's altitude affect EARENDIL-1 viewing?
Johannesburg sits at 1,753m elevation on the South African Highveld — Africa's highest-altitude major city and among the highest-altitude capitals in the world. The thinner atmosphere at this altitude reduces atmospheric extinction (light absorption) compared to sea-level cities by approximately 0.15–0.2 magnitudes, enhancing apparent mirror brightness. Combined with 76° near-zenith peak elevation, Johannesburg offers one of the visually best-positioned urban locations on Earth for orbital mirror viewing — rivalled only by Mexico City (2,240m), Quito (2,850m), and a handful of other altitude capitals. The Highveld's famous dry winter clarity makes May–August particularly exceptional.
What dark-sky locations near Johannesburg are best for watching the mirror pass?
The Blue Mountains (90 minutes west, Bortle 3–4) give the clearest sky with minimal light dome interference. Ku-ring-gai Chase National Park (45 minutes north) is excellent for clear northern passes. Royal National Park (45 minutes south) has a clear southern horizon. For serious observation, Observatory Hill in the CBD works for the bright mirror itself — at magnitude −4 it needs no dark sky — but the Blue Mountains are far better for seeing the beam footprint effect against a dark sky backdrop.
OrbitalNodes.ai tracks the ISS, Tiangong, Hubble, and all satellites over Johannesburg in real time — including exact pass times, directions, and brightness predictions.
→ SATELLITES OVER JOHANNESBURG — ORBITALNODES.AI