{"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":"2026-09-02T23:48:13.657Z","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":"hd-152113","name":"HD 152113","class":"f6iv_yellow_white_subgiant","category":"star","object_type":"F6IV yellow-white subgiant","mag":6.68,"mag_band":"V","abs_mag":2.641,"abs_mag_band":"V","distance_ly":209.47752130873334,"distance_method":"parallax","ra_deg":252.78090000000003,"dec_deg":9.404321,"epoch_ra_deg":253.101549,"epoch_dec_deg":9.357399,"epoch_moved_arcsec":3.168,"pm_ra_mas_yr":15.56,"pm_dec_mas_yr":-117.76,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ophiuchus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-152113","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"16511+0924","companions":[{"measured":2020,"magnitude":8.2,"components":"AB","discoverer_code":"STF2106","separation_arcsec":0.8,"position_angle_deg":171},{"measured":2015,"magnitude":12.4,"components":"AC","discoverer_code":"LBU  16","separation_arcsec":69.5,"position_angle_deg":159}],"spectral_type":"F6IV","color_index_bv":0.529,"luminosity_solar":7.6489179100707165,"radial_velocity_km_s":-34.6,"spectral_type_source":"SIMBAD (quality C)","surface_temperature_k":6167,"proper_motion_ra_mas_yr":15.56,"proper_motion_dec_mas_yr":-117.76,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 152113"},{"catalog":"HIP","designation":"HIP 82460"}],"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."}