{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T23:07:09.159Z","years_from_j2000":26.665,"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-177474","name":"γ CrA A","class":"f8v_f8v_yellow_white_main_sequence_star","category":"star","object_type":"F8V+F8V yellow-white main-sequence star","mag":4.23,"mag_band":"V","abs_mag":3.039,"abs_mag_band":"V","distance_ly":56.438099600105275,"distance_method":"parallax","ra_deg":286.60456500000004,"dec_deg":-37.063437,"epoch_ra_deg":287.057921,"epoch_dec_deg":-37.024452,"epoch_moved_arcsec":7.893,"pm_ra_mas_yr":96.93,"pm_dec_mas_yr":-279.67,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corona Australis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-177474","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19064-3704","companions":[{"measured":2025,"magnitude":5.05,"components":null,"discoverer_code":"HJ 5084","separation_arcsec":1.6,"position_angle_deg":308}],"spectral_type":"F8V+F8V","color_index_bv":0.523,"luminosity_solar":5.301515066784585,"radial_velocity_km_s":-53.2,"spectral_type_source":"SIMBAD (2013MNRAS.428.3104E, quality C)","surface_temperature_k":6188,"proper_motion_ra_mas_yr":96.93,"proper_motion_dec_mas_yr":-279.67,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Gamma CrA"},{"catalog":"Gliese","designation":"Gl 743.1A"},{"catalog":"HD","designation":"HD 177474"},{"catalog":"HIP","designation":"HIP 93825"},{"catalog":"HR","designation":"HR 7226"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}