{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T16:57:14.459Z","years_from_j2000":26.675,"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-38","name":"HD 38","class":"k6v_m0_5v_orange_dwarf","category":"star","object_type":"K6V+M0.5V orange dwarf","mag":8.2,"mag_band":"V","abs_mag":7.933,"abs_mag_band":"V","distance_ly":36.87882778480989,"distance_method":"parallax","ra_deg":1.4199599999999999,"dec_deg":45.812081,"epoch_ra_deg":1.775363,"epoch_dec_deg":45.960462,"epoch_moved_arcsec":23.797,"pm_ra_mas_yr":878.73,"pm_dec_mas_yr":-153.87,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Andromeda","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-38","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00057+4549","companions":[{"measured":2024,"magnitude":9.15,"components":"AB","discoverer_code":"STT 547","separation_arcsec":6,"position_angle_deg":192},{"measured":2016,"magnitude":16,"components":"AQ","discoverer_code":"POP 217","separation_arcsec":13.8,"position_angle_deg":147},{"measured":2016,"magnitude":null,"components":"AX","discoverer_code":"POP 217","separation_arcsec":17.8,"position_angle_deg":246},{"measured":2020,"magnitude":13.4,"components":"AP","discoverer_code":"POP 217","separation_arcsec":18.9,"position_angle_deg":311},{"measured":2020,"magnitude":11.75,"components":"AE","discoverer_code":"STT 547","separation_arcsec":60.6,"position_angle_deg":340},{"measured":2020,"magnitude":12.51,"components":"AD","discoverer_code":"STT 547","separation_arcsec":113.3,"position_angle_deg":232},{"measured":2020,"magnitude":13.71,"components":"AC","discoverer_code":"STT 547","separation_arcsec":120.7,"position_angle_deg":263},{"measured":2018,"magnitude":14.8,"components":"AY","discoverer_code":"POP 217","separation_arcsec":188.8,"position_angle_deg":78},{"measured":2018,"magnitude":10.19,"components":"AF","discoverer_code":"STT 547","separation_arcsec":330,"position_angle_deg":254}],"spectral_type":"K6V+M0.5V","color_index_bv":1.41,"luminosity_solar":0.05845208403588553,"variable_mag_max":8.171,"variable_mag_min":8.311,"radial_velocity_km_s":0.2,"spectral_type_source":"SIMBAD (2006PASP..118..814T, quality C)","proper_motion_ra_mas_yr":878.73,"proper_motion_dec_mas_yr":-153.87},"designations":[{"catalog":"Gliese","designation":"Gl 4A"},{"catalog":"HD","designation":"HD 38"},{"catalog":"HIP","designation":"HIP 473"}],"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."}