{"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":"2026-09-02T18:50:14.675Z","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-75289","name":"HD 75289","class":"f9vfe_0_3_yellow_white_main_sequence_star","category":"star","object_type":"F9VFe+0.3 yellow-white main-sequence star","mag":6.35,"mag_band":"V","abs_mag":4.027,"abs_mag_band":"V","distance_ly":95.06153784932204,"distance_method":"parallax","ra_deg":131.91831,"dec_deg":-41.736792,"epoch_ra_deg":132.161534,"epoch_dec_deg":-41.836866,"epoch_moved_arcsec":6.097,"pm_ra_mas_yr":-20.5,"pm_dec_mas_yr":-227.68,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-75289","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08477-4144","age_years":5683087300,"companions":[{"measured":2017,"magnitude":11.8,"components":"AB","discoverer_code":"MUG   6","separation_arcsec":21.3,"position_angle_deg":77}],"mass_solar":1.102,"radius_solar":1.319,"spectral_type":"F9VFe+0.3","uncertainties":{"metallicity_fe_h":[0.036,0.036]},"color_index_bv":0.578,"luminosity_solar":2.1340274428489754,"metallicity_fe_h":0.295,"radial_velocity_km_s":14,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.253,"surface_temperature_k":5983,"metallicity_fe_h_source":"Median of 4 spectroscopic determinations in 2 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-20.5,"proper_motion_dec_mas_yr":-227.68,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":2.002},"designations":[{"catalog":"HD","designation":"HD 75289"},{"catalog":"HIP","designation":"HIP 43177"},{"catalog":"HR","designation":"HR 3497"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T18:38:07.546Z","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."}