{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T22:11:35.991Z","years_from_j2000":26.668,"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-58895","name":"HD 58895","class":"g3iv_yellow_subgiant","category":"star","object_type":"G3IV yellow subgiant","mag":6.58,"mag_band":"V","abs_mag":3.049,"abs_mag_band":"V","distance_ly":165.81398855465974,"distance_method":"parallax","ra_deg":111.0393,"dec_deg":-58.491949,"epoch_ra_deg":111.152981,"epoch_dec_deg":-58.54257,"epoch_moved_arcsec":4.351,"pm_ra_mas_yr":-87.79,"pm_dec_mas_yr":137.52,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Carina","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-58895","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07242-5830","age_years":4149977700,"companions":[{"measured":2015,"magnitude":11.3,"components":"AC","discoverer_code":"LDS 181","separation_arcsec":129.3,"position_angle_deg":196}],"mass_solar":1.299,"radius_solar":2.367,"spectral_type":"G3IV","uncertainties":{"metallicity_fe_h":[0.065,0.065]},"color_index_bv":0.71,"luminosity_solar":5.252910484500482,"metallicity_fe_h":0.305,"radial_velocity_km_s":19.7,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality C)","surface_gravity_log_g":3.81,"surface_temperature_k":5611,"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":-87.79,"proper_motion_dec_mas_yr":137.52,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":4.8931},"designations":[{"catalog":"HD","designation":"HD 58895"},{"catalog":"HIP","designation":"HIP 35910"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}