EARENDIL-1
First Commercial Space Mirror
The first commercial orbital mirror ever built — an 18×18 metre aluminised Mylar reflector targeting mid-2026 launch aboard SpaceX Falcon 9 into sun-synchronous orbit. Two proof-of-concept missions are planned for 2026. If successful, it will be the first mirror in orbit since Russia's Znamya-2.5 failed in 1999.
Eärendil-1 — Spacecraft Schematic
Based on confirmed public specs. Official render not yet released.
The World's First Commercial Orbital Mirror
EARENDIL-1 is a demonstration satellite built by US startup Reflect Orbital. It is an 18×18 metre square of aluminised Mylar film — essentially a giant reflective sail — designed to redirect sunlight toward a specific location on Earth's surface. Each pass delivers approximately 3.5 minutes of enhanced illumination to a roughly 5km footprint.
The name references the Elvish mariner Eärendil from J.R.R. Tolkien's mythology — a figure associated with a bright star that served as a light of hope. The satellite will appear as a bright moving point of light, comparable to Venus at its maximum, during visible passes.
If EARENDIL-1 launches and operates successfully, it will be the first orbital mirror deployed since Russia's Znamya-2.5 failed during deployment in February 1999 — a gap of over 27 years.
Sun-Synchronous Orbit at 625km
EARENDIL-1 targets a sun-synchronous orbit (SSO) at 625km altitude — the same orbital regime used by Earth observation satellites including Landsat and Sentinel. Sun-synchronous means the satellite crosses the equator at the same local solar time on every orbit, keeping it in near-constant sunlight. This is essential for a mirror — it needs to be sunlit to reflect anything.
At 625km the orbital period is approximately 97 minutes. This means EARENDIL-1 completes roughly 15 orbits per day. Any given location on Earth will see it pass overhead 3-5 times per week during the twilight viewing window.
The mirror is steerable — it can tilt away from Earth between commercial passes to reduce sky brightness. During active commercial passes it aims its 18×18m reflective surface at the target footprint.
Road to Launch
Reflect Orbital Founded
Company established by Ben Nowack (ex-SpaceX) and Tristan Semmelhack (ex-Zipline) with the goal of building commercial orbital mirrors. Initially based in Santa Monica, later moved to Hawthorne, California.
Hot-Air Balloon Demo
A 6m² mirror on a balloon at 3km altitude successfully redirects sunlight onto solar panels during twilight. The demo goes viral and attracts immediate VC interest — the turning point for institutional funding.
$6.5M Seed — Sequoia Leads
Sequoia Capital's first space investment since SpaceX in 2010. Partner Shaun Maguire leads. Baiju Bhatt (Robinhood co-founder) and Zipline co-founders Keller Rinaudo and Keenan Wyrobek participate as angel investors.
Series A — $20M led by Lux Capital
Lux Capital leads the Series A with participation from Sequoia Capital and Starship Ventures. Josh Wolfe (Lux) joins the cap table. Before a single satellite launches, the company has received over 260,000 service applications from 157 countries.
US Air Force SBIR Phase II — $1.25M
AFWERX and the Air Force Research Laboratory award Reflect Orbital a Phase II Small Business Innovation Research contract to develop reflector technology for military illumination applications. Non-dilutive funding and significant credibility with regulators.
FCC Experimental Licence Filed
Reflect Orbital files with the FCC for an experimental licence (SAT-LOA-20250701-00129) to operate EARENDIL-1 in sun-synchronous orbit. The filing triggers global media coverage and the first sustained public debate about orbital mirror regulation. Over 1,800 public comments are eventually filed.
SpaceX Falcon 9 Selected
Falcon 9 confirmed as the launch vehicle for EARENDIL-1 and a second demonstration mission. Launch stated as "no later than 2026." Removes launch-vehicle risk — once FCC approval arrives, launch can proceed on short notice.
AAS Petition to Deny · Comment Period Closes
American Astronomical Society files a formal petition to deny the FCC application on 6 March 2026, citing catastrophic interference with federally funded astronomy. Comment period closes on 9 March with 1,800+ filings. DarkSky International classifies EARENDIL-1 as Risk Group 3 (High Risk). FCC enters extended evaluation phase.
Original Launch Target Missed
The April 2026 target stated in the FCC filing passes without launch. FCC decision still pending; no US satellite can legally launch without it. Delay is regulatory, not technical — Falcon 9 remains booked, hardware is reportedly ready.
EARENDIL-1 Launch Target — SpaceX Falcon 9
Planned launch aboard a SpaceX Falcon 9 rideshare mission. If launch and orbital insertion are confirmed, OrbitalSolar.ai will publish live pass predictions within hours of TLE data becoming available on Space-Track.org.
What EARENDIL-1 Is Selling
Reflect Orbital's business model is to sell illumination as a service — priced per mirror-hour. Each pass delivers approximately 3.5 minutes of enhanced sunlight to a ~5km footprint, at roughly 20% of midday solar irradiance — equivalent to a slightly overcast midday.
Primary target customers are solar energy operators wanting supplemental generation after sunset, entertainment and events venues wanting dramatic lighting effects, and military and emergency response agencies requiring on-demand remote illumination.
Deploying a large thin-film reflector in orbit is technically challenging. NASA's ACS3 solar sail (2024) experienced uncontrolled rotation after deployment — a precedent that highlights the difficulty of large deployed structures. Reflect Orbital has not published detailed failure mode analysis publicly.