{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T16:09:46.711Z","years_from_j2000":26.67,"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-27616","name":"HD 27616","class":"a0v_white_main_sequence_star","category":"star","object_type":"A0V white main-sequence star","mag":5.38,"mag_band":"V","abs_mag":-0.438,"abs_mag_band":"V","distance_ly":475.44663186351755,"distance_method":"parallax","ra_deg":65.16255,"dec_deg":-20.639622,"epoch_ra_deg":65.456068,"epoch_dec_deg":-20.57516,"epoch_moved_arcsec":0.741,"pm_ra_mas_yr":26.13,"pm_dec_mas_yr":-9.4,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-27616","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04207-2038","companions":[{"measured":2022,"magnitude":7.1,"components":null,"discoverer_code":"VSC   3","separation_arcsec":0.1,"position_angle_deg":274}],"spectral_type":"A0V","color_index_bv":-0.027,"luminosity_solar":130.37670471382128,"radial_velocity_km_s":32,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_temperature_k":9666,"proper_motion_ra_mas_yr":26.13,"proper_motion_dec_mas_yr":-9.4,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 27616"},{"catalog":"HIP","designation":"HIP 20264"},{"catalog":"HR","designation":"HR 1367"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}