{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T10:43:02.940Z","years_from_j2000":26.677,"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-72470","name":"HIP 72470","class":"k5_orange_star","category":"star","object_type":"K5 orange star","mag":10.64,"mag_band":"V","abs_mag":7.256,"abs_mag_band":"V","distance_ly":154.9435226417384,"distance_method":"parallax","ra_deg":222.27893999999998,"dec_deg":70.52639,"epoch_ra_deg":222.341425,"epoch_dec_deg":70.415161,"epoch_moved_arcsec":4.527,"pm_ra_mas_yr":-119.1,"pm_dec_mas_yr":120.9,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Minor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-72470","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"14491+7032","companions":[{"measured":2016,"magnitude":15.95,"components":null,"discoverer_code":"NSN 660","separation_arcsec":2.8,"position_angle_deg":143}],"mass_solar":0.712,"radius_solar":0.707,"spectral_type":"K5","color_index_bv":1.552,"luminosity_solar":0.10904355455436587,"variable_mag_max":10.575,"variable_mag_min":10.715,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1984AJ.....89..702L, quality D)","surface_gravity_log_g":4.584,"surface_temperature_k":4563,"proper_motion_ra_mas_yr":-119.1,"proper_motion_dec_mas_yr":120.9,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.1969},"designations":[{"catalog":"HIP","designation":"HIP 72470"}],"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."}