{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T19:39:57.692Z","years_from_j2000":26.668,"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-67501","name":"HD 67501","class":"f5v_f8iv_v_yellow_white_main_sequence_star","category":"star","object_type":"F5V+F8IV/V yellow-white main-sequence star","mag":6.68,"mag_band":"V","abs_mag":2.626,"abs_mag_band":"V","distance_ly":210.96805595489886,"distance_method":"parallax","ra_deg":122.37651,"dec_deg":32.221138,"epoch_ra_deg":122.800848,"epoch_dec_deg":32.142516,"epoch_moved_arcsec":0.989,"pm_ra_mas_yr":35.97,"pm_dec_mas_yr":-9.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-67501","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08095+3213","companions":[{"measured":2014,"magnitude":null,"components":"Aa,Ab","discoverer_code":"CHR 190","separation_arcsec":0.2,"position_angle_deg":148},{"measured":2025,"magnitude":7.98,"components":"AB","discoverer_code":"STF1187","separation_arcsec":1.9,"position_angle_deg":22}],"spectral_type":"F5V+F8IV/V","color_index_bv":0.486,"luminosity_solar":7.755324957585906,"radial_velocity_km_s":11.4,"spectral_type_source":"SIMBAD (1935ApJ....81..187A, quality D)","surface_temperature_k":6540,"proper_motion_ra_mas_yr":35.97,"proper_motion_dec_mas_yr":-9.08,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 67501"},{"catalog":"HIP","designation":"HIP 39948"}],"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."}