BRAZILEARENDIL-1 Passes
Over São Paulo
Predicted pass geometry, viewing conditions, and beam footprint data for São Paulo when EARENDIL-1 — the first commercial orbital mirror — launches later in 2026. From 23.5°S, sitting almost exactly on the Tropic of Capricorn, EARENDIL-1 can pass directly overhead: an 88° orbit crosses every populated latitude, so the ceiling is the zenith rather than a fixed angle. What differs is how often — at 23.5° S, São Paulo sits well inside the ground track, so they still happen but come round less often than at higher latitudes. São Paulo's altitude of 760m provides additional atmospheric clarity. Passes rise in the NW and transit toward the NE, opposite to northern-hemisphere observers.
Predicted geometry for the planned 88° near-polar orbit at 625 km. Eärendil-1 has not launched, so these are modelled figures, not observations — and because the orbit is not sun-synchronous, pass times drift through the year rather than recurring at a fixed hour.
Best: APR–OCT. Southern winter — long nights and the driest, steadiest air of the year.
Seasonal guidance only — based on this location’s latitude and climate, not on Eärendil-1 observations. The mirror has not launched, and because its orbit is not sun-synchronous the pass times themselves drift through the year independently of the weather.
What to Expect in São Paulo
What EARENDIL-1 Will Look Like from São Paulo
From São Paulo, 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. a near-overhead pass the mirror transits nearly overhead on best nights, making it the brightest non-natural object in the São Paulo sky during a pass. The city's high altitude gives slightly clearer atmospheric conditions than sea-level Rio or Buenos Aires.
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 São Paulo at Launch
OrbitalNodes.ai will provide real-time pass predictions for São Paulo 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 — São Paulo
How bright will EARENDIL-1 appear from São Paulo?
At peak overhead passes, EARENDIL-1 is designed to reach magnitude −4 — comparable to Venus at maximum brightness. São Paulo's a near-overhead pass puts the mirror nearly at the zenith on best passes, enhancing its apparent brightness compared to mid-latitude cities. It is easily visible from Avenida Paulista, Ibirapuera Park, or anywhere in the CBD despite Bortle 8–9 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 São Paulo?
From 23.5°S, on the Tropic of Capricorn, EARENDIL-1 can pass directly overhead: an 88° orbit crosses every populated latitude, so the ceiling is the zenith rather than a fixed angle. What differs is how often — at 23.5° S, São Paulo sits well inside the ground track, so they still happen but come round less often than at higher latitudes. Passes rise in the NW and transit toward the NE, opposite to the direction seen from northern-hemisphere observers. Higher elevation passes give a longer viewing window and brighter appearance. São Paulo's latitude is comparable to Rockhampton (Australia) and central Madagascar.
When is the best time to see it from São Paulo?
June through August is São Paulo's dry winter season — frequent clear nights, lower humidity, and mild evening temperatures. Summer (December–March) brings tropical afternoon storms and high humidity that limit viewing. Autumn (April–May) and spring (September–November) are reliably settled transitional seasons. Brotas and Analândia offer dark-sky destinations within a 3–4 hour drive.
Will the beam footprint hit São Paulo?
A 5km beam footprint could span from Avenida Paulista to Ibirapuera Park in a single pass, or cover the entire central zone from República district to Brooklin. A pass targeting Ibirapuera Park — São Paulo's largest and most iconic green space — would create visually striking imagery. Alternatively, a beam over Morumbi or Pico do Jaraguá (the city's highest point) could offer elevated viewing angles. Whether any specific location falls in the footprint depends on Reflect Orbital's commercial contracts and targeting decisions. Given São Paulo's vast metro area, a single 5km beam covers only a small fraction of the built-up city.
Is EARENDIL-1 visible yet?
No — EARENDIL-1 has not launched yet. Reflect Orbital is targeting a launch later in 2026. 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 São Paulo than from other cities?
From the Southern Hemisphere on the Tropic of Capricorn, EARENDIL-1 rises in the NW and transits toward the NE — opposite to the direction seen from northern cities. This is because São Paulo sits south of the equator, so near-polar satellites approach from the opposite polar direction relative to northern-hemisphere observers. Pass geometry is similar to what observers in Brisbane or Johannesburg see.
What makes São Paulo's location significant for EARENDIL-1 viewing?
São Paulo sits almost exactly on the Tropic of Capricorn — the most southerly latitude where the sun reaches the zenith on the December solstice. This gives the city some of the highest peak elevations for EARENDIL-1 of any major metro, bringing the mirror directly overhead. São Paulo also sits at 760m altitude, giving thinner atmosphere and slightly better transparency than sea-level cities like Rio de Janeiro. The combination of near-zenith passes and elevated altitude makes São Paulo one of the visually best-positioned Southern Hemisphere cities for orbital mirror viewing — despite its extreme urban light pollution. The vast metro (22 million people across 7,900 km²) means a 5km beam footprint covers only a small fraction of the built-up area.
What dark-sky locations near São Paulo 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 São Paulo in real time — including exact pass times, directions, and brightness predictions.
→ SATELLITES OVER SÃO PAULO — ORBITALNODES.AI