{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T21:26:42.636Z","years_from_j2000":26.67,"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-23285","name":"HD 23285","class":"g8_k1iii_a_f_yellow_giant","category":"star","object_type":"G8/K1III+A/F yellow giant","mag":7.54,"mag_band":"V","abs_mag":2.57,"abs_mag_band":"V","distance_ly":321.65313660960834,"distance_method":"parallax","ra_deg":55.455884999999995,"dec_deg":-48.239176,"epoch_ra_deg":55.663347,"epoch_dec_deg":-48.153329,"epoch_moved_arcsec":2.154,"pm_ra_mas_yr":-14.1,"pm_dec_mas_yr":-79.53,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Horologium","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-23285","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03418-4814","age_years":1942668900,"companions":[{"measured":2016,"magnitude":9.92,"components":null,"discoverer_code":"SLR   5","separation_arcsec":1.6,"position_angle_deg":182}],"mass_solar":1.596,"radius_solar":2.506,"spectral_type":"G8/K1III+A/F","color_index_bv":0.469,"luminosity_solar":8.165823713585922,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality D)","surface_gravity_log_g":3.739,"surface_temperature_k":6429,"proper_motion_ra_mas_yr":-14.1,"proper_motion_dec_mas_yr":-79.53,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":9.4692},"designations":[{"catalog":"HD","designation":"HD 23285"},{"catalog":"HIP","designation":"HIP 17260"}],"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."}