{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T07:32:32.761Z","years_from_j2000":26.672,"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-97916","name":"HD 97916","class":"f5_5vgf2_5kf2_ma6_yellow_white_main_sequence_star","category":"star","object_type":"F5.5VgF2.5kF2:mA6 yellow-white main-sequence star","mag":9.21,"mag_band":"V","abs_mag":3.969,"abs_mag_band":"V","distance_ly":364.42039163771636,"distance_method":"parallax","ra_deg":168.97596000000001,"dec_deg":2.08669,"epoch_ra_deg":169.322616,"epoch_dec_deg":1.940245,"epoch_moved_arcsec":5.565,"pm_ra_mas_yr":208.47,"pm_dec_mas_yr":-8.49,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-97916","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"F5.5VgF2.5kF2:mA6","uncertainties":{"metallicity_fe_h":[0.225,0.225]},"color_index_bv":0.425,"luminosity_solar":2.251127015912879,"metallicity_fe_h":-0.94,"radial_velocity_km_s":61.7,"spectral_type_source":"SIMBAD (2020MNRAS.499.2701M, quality C)","surface_gravity_log_g":4.03,"surface_temperature_k":6401,"metallicity_fe_h_source":"Median of 11 spectroscopic determinations in 18 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":208.47,"proper_motion_dec_mas_yr":-8.49,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 97916"},{"catalog":"HIP","designation":"HIP 55022"}],"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."}