{"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":"2026-08-31T22:27:15.203Z","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-7174","name":"HD 7174","class":"f5v_yellow_white_main_sequence_star","category":"star","object_type":"F5V yellow-white main-sequence star","mag":7.98,"mag_band":"V","abs_mag":3.155,"abs_mag_band":"V","distance_ly":300.8821938510953,"distance_method":"parallax","ra_deg":17.648685,"dec_deg":-65.921696,"epoch_ra_deg":17.897511,"epoch_dec_deg":-65.77853,"epoch_moved_arcsec":2.512,"pm_ra_mas_yr":92.45,"pm_dec_mas_yr":18.17,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Tucana","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-7174","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01106-6555","companions":[{"measured":2019,"magnitude":9.53,"components":"Aa,Ab","discoverer_code":"HDS 154","separation_arcsec":0.7,"position_angle_deg":297},{"measured":2015,"magnitude":16.2,"components":"AB","discoverer_code":"UC  511","separation_arcsec":62.1,"position_angle_deg":9}],"spectral_type":"F5V","color_index_bv":0.47,"luminosity_solar":4.7643098680541565,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality C)","surface_temperature_k":6444,"proper_motion_ra_mas_yr":92.45,"proper_motion_dec_mas_yr":18.17,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 7174"},{"catalog":"HIP","designation":"HIP 5514"}],"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."}