{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T03:09:03.056Z","years_from_j2000":26.685,"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-115383","name":"59 Vir","class":"g0iv_yellow_subgiant","category":"star","object_type":"G0IV yellow subgiant","mag":5.19,"mag_band":"V","abs_mag":3.967,"abs_mag_band":"V","distance_ly":57.270776832416125,"distance_method":"parallax","ra_deg":199.19382000000002,"dec_deg":9.424156,"epoch_ra_deg":199.527778,"epoch_dec_deg":9.283672,"epoch_moved_arcsec":10.275,"pm_ra_mas_yr":-334.51,"pm_dec_mas_yr":190.7,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-115383","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13168+0925","age_years":7419750700,"companions":[{"measured":2015,"magnitude":14.59,"components":"AB","discoverer_code":"KUI  62","separation_arcsec":54.2,"position_angle_deg":100}],"mass_solar":1.065,"radius_solar":1.392,"spectral_type":"G0IV","color_index_bv":0.585,"luminosity_solar":2.255277566745247,"radial_velocity_km_s":-27.4,"spectral_type_source":"SIMBAD (2001AJ....121.2148G, quality C)","surface_gravity_log_g":4.225,"surface_temperature_k":5931,"proper_motion_ra_mas_yr":-334.51,"proper_motion_dec_mas_yr":190.7,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":2.1767},"designations":[{"catalog":"Bayer/Flamsteed","designation":"59 Vir"},{"catalog":"Exoplanet host","designation":"GJ 504"},{"catalog":"Gliese","designation":"Gl 504"},{"catalog":"HD","designation":"HD 115383"},{"catalog":"HIP","designation":"HIP 64792"},{"catalog":"HR","designation":"HR 5011"}],"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."}