{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T01:18:59.344Z","years_from_j2000":26.671,"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":"hip-7422","name":"HIP 7422","class":"g5_yellow_star","category":"star","object_type":"G5 yellow star","mag":10.07,"mag_band":"V","abs_mag":5.209,"abs_mag_band":"V","distance_ly":305.96273174678896,"distance_method":"parallax","ra_deg":23.910629999999998,"dec_deg":76.001726,"epoch_ra_deg":24.502033,"epoch_dec_deg":76.139389,"epoch_moved_arcsec":7.67,"pm_ra_mas_yr":282.83,"pm_dec_mas_yr":52.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cassiopeia","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-7422","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01357+7600","companions":[{"measured":2016,"magnitude":14.72,"components":null,"discoverer_code":"LDS1533","separation_arcsec":186.8,"position_angle_deg":12}],"radius_solar":0.935,"spectral_type":"G5","color_index_bv":0.863,"luminosity_solar":0.7184557087925968,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","surface_gravity_log_g":4.462,"surface_temperature_k":5188,"proper_motion_ra_mas_yr":282.83,"proper_motion_dec_mas_yr":52.08,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.5718},"designations":[{"catalog":"HIP","designation":"HIP 7422"}],"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."}