SkyStreaks
An astrophotographer's planner that predicts visible satellite passes (ISS, Hubble, Starlink trains) over any location with exact framing angles, weather-aware shooting windows, and alerts when a rare bright transit lines up with the moon or an aurora.
Astrophotographers and night-sky content creators chasing satellite streaks and ISS silhouettes
- Minute-by-minute pass predictions with magnitude, altitude, and direction for every tracked object
- Optimal shooting-window scoring that weighs moon phase, weather, light pollution, and sun elevation
- AR sky-overlay showing the satellite's exact arc so you can frame foreground landmarks
- Push alerts for ISS-visible passes, Starlink train windows, and rare multi-satellite alignments
Celestrak just crossed 100,000 cataloged objects to fix its Y2K-era numbering, reflecting an unprecedented amount of hardware in orbit — meaning more streak opportunities, more ISS silhouettes, and more Starlink trains worth photographing than ever before.
Multiple free satellite pass trackers (Orbital Radar, sat-above, iss.guru, Elysia, satflare) and dedicated astrophotography planners (Observer Pro, Simple Sky, AstroPhotoAssistant) show a real active user base, but the satellite-pass slice is dominated by free tools, so paying demand is unproven.Satellite Pass Predictions — ISS & Starlink Visible Tonight From Your Location ↗17 Best Astrophotography Apps in 2026 (For Night Sky Photos) ↗
No incumbent combines satellite-pass prediction + photographer framing angles + weather-aware windows + rare transit (moon/aurora) alerts; however, general satellite trackers and astrophotography planners (SkySafari, Simple Sky, Observer Pro) already overlap much of the feature set, leaving the true whitespace narrower than the pitch implies.Simple Sky - Professional Astrophotography Planning ↗SkySafari 8 | Pick Your Interstellar Partner - Basic, Plus & Pro ↗
Willingness to pay exists in the adjacent astronomy app market (SkySafari Plus/Pro subscriptions, paid Observer Pro), but the satellite-pass prediction niche is currently served by numerous free websites and apps, limiting realistic pricing power for this specific feature set.SkySafari 8 Plus ↗Satellite Tracker — Live ISS & Satellite Pass Predictions ↗
CelesTrak officially crossed into 6-digit catalog numbers (100,000+) in July 2026, confirming the orbital population keeps growing past the legacy 5-digit ceiling; with SpaceX Starlink, Amazon Kuiper and other megaconstellations still deploying, streak/transit opportunities are on a clear upward trajectory with no reversal in sight.Object 100000 and the Sky That Outgrew Its Catalog ↗Starlink Tracker — Live Satellite Map, Train Finder & Visible Passes ↗
Buildable: CelesTrak/space-track TLE data + open SGP4 propagators (satellite.js, python-sgp4) handle pass/orbit math; weather APIs (NOAA, Astrospheric-style) cover shooting windows; framing-angle and moon/aurora conjunction logic is standard astronomical calculation. Mobile/web build is straightforward but polishing a niche-quality UX still takes real work.ISS & Satellite Pass Tracker | Online Free Tool | Elysia Tools ↗The 20 Best Astronomy Apps in 2026 | Night Sky & Stargazing ↗