{"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":"2026-09-06T15:19:27.692Z","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-13612","name":"66 Cet","class":"f8v_yellow_white_main_sequence_star","category":"star","object_type":"F8V yellow-white main-sequence star","mag":5.65,"mag_band":"V","abs_mag":2.656,"abs_mag_band":"V","distance_ly":129.47853729512596,"distance_method":"parallax","ra_deg":33.19809,"dec_deg":-2.393637,"epoch_ra_deg":33.54181,"epoch_dec_deg":-2.268015,"epoch_moved_arcsec":10.178,"pm_ra_mas_yr":374.41,"pm_dec_mas_yr":-73.08,"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-13612","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02128-0224","companions":[{"measured":2024,"magnitude":7.71,"components":"AB","discoverer_code":"STF 231","separation_arcsec":16.8,"position_angle_deg":235},{"measured":1998,"magnitude":11.5,"components":"AC","discoverer_code":"STF 231","separation_arcsec":147,"position_angle_deg":53}],"spectral_type":"F8V","uncertainties":{"metallicity_fe_h":[0.07,0.07]},"color_index_bv":0.546,"luminosity_solar":7.543970821979897,"metallicity_fe_h":-0.04,"variable_mag_max":5.608,"variable_mag_min":5.728,"radial_velocity_km_s":-6,"spectral_type_source":"SIMBAD (1988ApJ...331..922A, quality C)","surface_gravity_log_g":3.99,"surface_temperature_k":6100,"metallicity_fe_h_source":"Median of 2 spectroscopic determinations in 3 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":374.41,"proper_motion_dec_mas_yr":-73.08,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"66 Cet"},{"catalog":"Gliese","designation":"Gl 87.1A"},{"catalog":"HD","designation":"HD 13612"},{"catalog":"HIP","designation":"HIP 10305"},{"catalog":"HR","designation":"HR 650"}],"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."}