{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T21:38:49.827Z","years_from_j2000":26.676,"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":"hd-215191","name":"HD 215191","class":"b1_5v_blue_white_main_sequence_star","category":"star","object_type":"B1.5V blue-white main-sequence star","mag":6.43,"mag_band":"V","abs_mag":-1.106,"abs_mag_band":"V","distance_ly":1048.7343062272591,"distance_method":"parallax","ra_deg":340.73103000000003,"dec_deg":37.802735,"epoch_ra_deg":341.035375,"epoch_dec_deg":37.943221,"epoch_moved_arcsec":0.145,"pm_ra_mas_yr":-1.12,"pm_dec_mas_yr":-5.3,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lacerta","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-215191","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"mass_solar":6.687,"radius_solar":5.5,"spectral_type":"B1.5V","color_index_bv":-0.119,"luminosity_solar":241.21260560925748,"radial_velocity_km_s":-18,"spectral_type_source":"SIMBAD (2024A&A...690A.176N, quality C)","surface_gravity_log_g":3.775,"surface_temperature_k":17843,"proper_motion_ra_mas_yr":-1.12,"proper_motion_dec_mas_yr":-5.3,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":2677.0298},"designations":[{"catalog":"HD","designation":"HD 215191"},{"catalog":"HIP","designation":"HIP 112144"},{"catalog":"HR","designation":"HR 8651"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-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."}