{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T19:39:53.567Z","years_from_j2000":26.687,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"gaia-bh1","name":"Gaia BH1","class":"stellar_mass_black_hole","category":"black_hole","object_type":"Stellar-mass black hole","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1560,"distance_method":null,"ra_deg":262.17124,"dec_deg":-0.58098,"epoch_ra_deg":262.517074,"epoch_dec_deg":-0.603207,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":1.9088734758701289e+31,"mass_msun":9.6,"constellation":"Ophiuchus","discovered":"2022","featured":true,"url":"https://spacecatalog.org/object/gaia-bh1","radius_km":null,"radius_kind":null,"data_quality":null,"description":"The nearest known dormant black hole, found not by X-rays but by the wobble it induces in a Sun-like companion that orbits it once a year.","properties":{"accretion":"dormant","mass_solar":9.6},"designations":[{"catalog":"Common name","designation":"Gaia BH1"}],"source":{"id":"curated","name":"SpaceCatalog curated data","url":"https://spacecatalog.org/releases","license":"CC-BY-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}