{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T04:35:28.642Z","years_from_j2000":26.677,"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-145972","name":"HD 145972","class":"f0v_yellow_white_main_sequence_star","category":"star","object_type":"F0V yellow-white main-sequence star","mag":8.42,"mag_band":"V","abs_mag":2.894,"abs_mag_band":"V","distance_ly":415.48571722769367,"distance_method":"parallax","ra_deg":244.01601000000002,"dec_deg":-49.074832,"epoch_ra_deg":244.514324,"epoch_dec_deg":-49.14205,"epoch_moved_arcsec":0.978,"pm_ra_mas_yr":-19.27,"pm_dec_mas_yr":-31.2,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Norma","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-145972","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"16161-4904","age_years":1134420500,"companions":[{"measured":2012,"magnitude":16.8,"components":"AB","discoverer_code":"JNN 227","separation_arcsec":2.8,"position_angle_deg":283},{"measured":2012,"magnitude":17.3,"components":"AC","discoverer_code":"JNN 227","separation_arcsec":2.9,"position_angle_deg":126},{"measured":2012,"magnitude":17.1,"components":"AD","discoverer_code":"JNN 227","separation_arcsec":3.5,"position_angle_deg":128},{"measured":2012,"magnitude":17.9,"components":"AF","discoverer_code":"JNN 227","separation_arcsec":3.7,"position_angle_deg":161},{"measured":2012,"magnitude":12.9,"components":"AI","discoverer_code":"JNN 227","separation_arcsec":3.9,"position_angle_deg":73},{"measured":2012,"magnitude":15.7,"components":"AE","discoverer_code":"JNN 227","separation_arcsec":4.1,"position_angle_deg":54},{"measured":2012,"magnitude":17.9,"components":"AH","discoverer_code":"JNN 227","separation_arcsec":4.8,"position_angle_deg":83},{"measured":2012,"magnitude":17.7,"components":"AG","discoverer_code":"JNN 227","separation_arcsec":4.9,"position_angle_deg":73}],"mass_solar":1.459,"radius_solar":1.571,"spectral_type":"F0V","color_index_bv":0.358,"luminosity_solar":6.058986711389652,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","surface_gravity_log_g":4.163,"surface_temperature_k":7025,"proper_motion_ra_mas_yr":-19.27,"proper_motion_dec_mas_yr":-31.2,"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":5.3705},"designations":[{"catalog":"HD","designation":"HD 145972"},{"catalog":"HIP","designation":"HIP 79710"}],"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."}