EARENDIL-1 Passes
Over Sydney
Predicted pass geometry, viewing conditions, and beam footprint data for Sydney when EARENDIL-1 — the first commercial orbital mirror — launches in mid-2026. From 33.9°S in the Southern Hemisphere, EARENDIL-1 passes appear to move in the opposite direction to northern hemisphere observers — rising in the NW and crossing toward the NE.
What to Expect in Sydney
What EARENDIL-1 Will Look Like from Sydney
From Sydney, 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 and clearly visible even from the light-polluted city centre. It will be one of the brightest objects in the sky during a pass.
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 Sydney at Launch
OrbitalNodes.ai will provide real-time pass predictions for Sydney 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 — Sydney
How bright will EARENDIL-1 appear from Sydney?
At peak overhead passes, EARENDIL-1 is designed to reach magnitude ~−4 — comparable to Venus at maximum brightness and clearly visible from anywhere in Sydney regardless of light pollution. This makes it one of the most conspicuous objects in the sky during a pass. Between commercial illumination passes, Reflect Orbital will tilt the mirror away from Earth, reducing brightness significantly.
How high will EARENDIL-1 appear from Sydney?
From 33.9°S in the Southern Hemisphere, EARENDIL-1 passes appear to move in the opposite direction to northern hemisphere observers — rising in the NW and crossing toward the NE. Maximum elevation up to 70°. The exact elevation varies pass by pass depending on the orbital geometry. Higher elevation passes give a longer viewing window and brighter appearance as the mirror is closer to the observer.
When is the best time to see it from Sydney?
April through October (southern hemisphere autumn/winter). Sydney's winter evenings are clear and cool with good transparency. Summer humidity reduces visibility. The Blue Mountains nearby offer dramatically darker skies within 90 minutes. Passes during the southern winter are prime viewing time — both you and the mirror are in the right geometry for visibility.
Will the beam footprint hit Sydney?
The 5km beam footprint could target areas from the CBD to Bondi Beach in a single pass. Sydney's harbour geography would make a pass over the Opera House and Bridge a particularly striking sight. Whether any specific location falls in the footprint depends on Reflect Orbital's commercial contracts and targeting decisions. The beam is steerable so it can be directed to specific cities or regions for commercial lighting purposes.
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 Sydney than from northern cities?
From the Southern Hemisphere, all satellites — including EARENDIL-1 — appear to move from west-northwest to east-northeast rather than the NW-to-NE arc seen from northern latitudes. This is because Sydney is south of EARENDIL-1's orbital inclination band, so the satellite approaches from below the equator's perspective. The pass geometry is a mirror image of what London observers see.
How does Sydney's harbour geography interact with the 5km beam?
Sydney's harbour and inner city span roughly 15–20km. A 5km EARENDIL-1 beam footprint could illuminate the Opera House and Harbour Bridge simultaneously — an area of roughly 3×5km. The harbour's reflective water would amplify the visual effect of the beam, creating a distinctive illuminated circle on the water. This makes Sydney one of the most commercially attractive cities for a demonstration pass.
What dark-sky locations near Sydney 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 Sydney in real time — including exact pass times, directions, and brightness predictions.
→ SATELLITES OVER SYDNEY — ORBITALNODES.AI