Look up bright and nearby stars, cone searches, constellations, distances, luminosity and visibility by latitude.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /brightest-stars | $0.02 | The N brightest stars by apparent magnitude in the whole sky or in one constellation (name or IAU code). |
GET /constellation-info | $0.02 | IAU constellation facts: 3-letter code, genitive, bright stars; pass 'list' for all 88 constellations. |
GET /nearest-stars | $0.02 | The N closest stars to the Sun (max 200) with distance in light years, parallax, magnitude and spectral type. |
GET /star-distance-and-luminosity | $0.02 | From apparent magnitude and parallax (mas): distance, absolute magnitude M = m + 5 + 5 log10(p arcsec), solar luminosity. |
GET /star-lookup | $0.02 | Look up a star by name, Bayer (Alpha CMa), HR, HIP, HD or Gliese number: magnitude, spectrum, J2000 position, distance. |
GET /star-visibility-from-latitude | $0.02 | Whether a star (or declination) ever rises above the horizon from a latitude, circumpolar status, and max altitude. |
GET /stars-in-constellation | $0.02 | List catalogued stars in an IAU constellation (name or 3-letter code), brightest first, with an optional named-only filter. |
GET /stars-near-sky-point | $0.02 | Cone search: stars within a radius (max 30 deg) of an RA/Dec J2000 point, nearest first, with separations. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Star data is the bright (V <= 6.5) and nearest-200 subset of the HYG database v4.1 (Hipparcos, Yale Bright Star and Gliese catalogues), CC BY-SA 4.0, provided as is. Positions are J2000 without proper-motion propagation; distances come from catalogue parallaxes with uncertainty; visibility ignores refraction, twilight, weather and local horizon. Not for navigation, pointing or professional astrometry. Every paid response carries a disclaimer field.