{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-09-01T01:34:22.649Z","years_from_j2000":26.665,"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-26307","name":"HD 26307","class":"k0iii_cniii_iv_orange_giant","category":"star","object_type":"K0III(CNIII/IV) orange giant","mag":7.87,"mag_band":"V","abs_mag":1.356,"abs_mag_band":"V","distance_ly":654.9324434593077,"distance_method":"parallax","ra_deg":61.5441,"dec_deg":-59.875971,"epoch_ra_deg":61.663543,"epoch_dec_deg":-59.802884,"epoch_moved_arcsec":0.336,"pm_ra_mas_yr":-11.89,"pm_dec_mas_yr":-4.18,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Reticulum","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-26307","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":556541560,"mass_solar":2.602,"radius_solar":8.348,"spectral_type":"K0III(CNIII/IV)","color_index_bv":0.925,"luminosity_solar":24.980435187141488,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality D)","surface_gravity_log_g":2.543,"surface_temperature_k":4972,"proper_motion_ra_mas_yr":-11.89,"proper_motion_dec_mas_yr":-4.18,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":38.608},"designations":[{"catalog":"HD","designation":"HD 26307"},{"catalog":"HIP","designation":"HIP 19141"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}