{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T19:28:05.859Z","years_from_j2000":26.681,"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-34030","name":"HD 34030","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":7.69,"mag_band":"V","abs_mag":2.657,"abs_mag_band":"V","distance_ly":331.123087036614,"distance_method":"parallax","ra_deg":78.971625,"dec_deg":34.423136,"epoch_ra_deg":79.416381,"epoch_dec_deg":34.452498,"epoch_moved_arcsec":3.371,"pm_ra_mas_yr":10.52,"pm_dec_mas_yr":-125.91,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Auriga","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-34030","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05159+3425","age_years":3109648500,"companions":[{"measured":2016,"magnitude":11.34,"components":"AB","discoverer_code":"ES  170","separation_arcsec":23.7,"position_angle_deg":12},{"measured":2015,"magnitude":12.03,"components":"AC","discoverer_code":"WAL  36","separation_arcsec":59.9,"position_angle_deg":303},{"measured":2015,"magnitude":11.17,"components":"AD","discoverer_code":"SMR  18","separation_arcsec":90.6,"position_angle_deg":216}],"mass_solar":1.401,"radius_solar":2.124,"spectral_type":"F8","color_index_bv":0.551,"luminosity_solar":7.5370257668842555,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":3.964,"surface_temperature_k":6074,"proper_motion_ra_mas_yr":10.52,"proper_motion_dec_mas_yr":-125.91,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":5.5181},"designations":[{"catalog":"HD","designation":"HD 34030"},{"catalog":"HIP","designation":"HIP 24538"}],"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."}