{"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":"2026-09-06T21:15:11.055Z","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-143107","name":"13 ε CrB","class":"k2iiiab_orange_giant","category":"star","object_type":"K2IIIab orange giant","mag":4.14,"mag_band":"V","abs_mag":-0.019,"abs_mag_band":"V","distance_ly":221.42332479898678,"distance_method":"parallax","ra_deg":239.39691000000002,"dec_deg":26.87788,"epoch_ra_deg":239.675858,"epoch_dec_deg":26.799625,"epoch_moved_arcsec":2.599,"pm_ra_mas_yr":-76.55,"pm_dec_mas_yr":-60.24,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corona Borealis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-143107","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15576+2653","companions":[{"measured":2016,"magnitude":12.6,"components":"AB","discoverer_code":"AGC   7","separation_arcsec":2,"position_angle_deg":13},{"measured":2015,"magnitude":12.61,"components":"AC","discoverer_code":"AGC   7","separation_arcsec":96,"position_angle_deg":172}],"spectral_type":"K2IIIab","color_index_bv":1.231,"luminosity_solar":88.63392873279338,"radial_velocity_km_s":-31,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","proper_motion_ra_mas_yr":-76.55,"proper_motion_dec_mas_yr":-60.24},"designations":[{"catalog":"Bayer/Flamsteed","designation":"13 Epsilon CrB"},{"catalog":"Exoplanet host","designation":"ε CrB"},{"catalog":"HD","designation":"HD 143107"},{"catalog":"HIP","designation":"HIP 78159"},{"catalog":"HR","designation":"HR 5947"}],"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."}