{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T17:25:51.609Z","years_from_j2000":26.675,"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":"hip-94918","name":"HIP 94918","class":"f9iv_v_yellow_white_subgiant","category":"star","object_type":"F9IV-V yellow-white subgiant","mag":9.51,"mag_band":"V","abs_mag":3.541,"abs_mag_band":"V","distance_ly":509.6193401824116,"distance_method":"parallax","ra_deg":289.72553999999997,"dec_deg":43.4963,"epoch_ra_deg":289.935626,"epoch_dec_deg":43.544591,"epoch_moved_arcsec":1.239,"pm_ra_mas_yr":27.39,"pm_dec_mas_yr":-37.49,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lyra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-94918","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19189+4330","companions":[{"measured":2014,"magnitude":10.3,"components":"Aa,Ab","discoverer_code":"GII 281","separation_arcsec":0.2,"position_angle_deg":108},{"measured":2016,"magnitude":12.69,"components":"AB","discoverer_code":"COU2523","separation_arcsec":2.6,"position_angle_deg":260}],"spectral_type":"F9IV-V","uncertainties":{"metallicity_fe_h":[0.061,0.061]},"color_index_bv":0.56,"luminosity_solar":3.3388737672512296,"metallicity_fe_h":-0.19,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2013MNRAS.434.1422M, quality C)","surface_gravity_log_g":4.04,"surface_temperature_k":5921,"metallicity_fe_h_source":"Median of 5 spectroscopic determinations in 4 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":27.39,"proper_motion_dec_mas_yr":-37.49,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HIP","designation":"HIP 94918"}],"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."}