{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T22:27:17.212Z","years_from_j2000":26.673,"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-16212","name":"80 Cet","class":"m0_1iii_red_giant","category":"star","object_type":"M0/1III red giant","mag":5.53,"mag_band":"V","abs_mag":-0.241,"abs_mag_band":"V","distance_ly":465.2731621297769,"distance_method":"parallax","ra_deg":39.000195000000005,"dec_deg":-7.831597,"epoch_ra_deg":39.331368,"epoch_dec_deg":-7.714678,"epoch_moved_arcsec":1.817,"pm_ra_mas_yr":-33.57,"pm_dec_mas_yr":-59.29,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-16212","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02360-0750","companions":[{"measured":1999,"magnitude":13.6,"components":"AB","discoverer_code":"BUP  33","separation_arcsec":117.2,"position_angle_deg":121},{"measured":2011,"magnitude":9.76,"components":"AC","discoverer_code":"BUP  33","separation_arcsec":140.2,"position_angle_deg":187}],"spectral_type":"M0/1III","color_index_bv":1.607,"luminosity_solar":108.74267195462436,"radial_velocity_km_s":14,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality D)","proper_motion_ra_mas_yr":-33.57,"proper_motion_dec_mas_yr":-59.29},"designations":[{"catalog":"Bayer/Flamsteed","designation":"80 Cet"},{"catalog":"HD","designation":"HD 16212"},{"catalog":"HIP","designation":"HIP 12107"},{"catalog":"HR","designation":"HR 759"}],"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."}