{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T22:38:49.095Z","years_from_j2000":26.665,"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-8985","name":"HD 8985","class":"f6_7v_yellow_white_main_sequence_star","category":"star","object_type":"F6/7V yellow-white main-sequence star","mag":7.73,"mag_band":"V","abs_mag":4.097,"abs_mag_band":"V","distance_ly":173.7647025742608,"distance_method":"parallax","ra_deg":22.030425,"dec_deg":-28.051253,"epoch_ra_deg":22.346481,"epoch_dec_deg":-27.911539,"epoch_moved_arcsec":3.364,"pm_ra_mas_yr":110.66,"pm_dec_mas_yr":60.56,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sculptor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-8985","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01281-2803","age_years":3901407200,"companions":[{"measured":2016,"magnitude":14.8,"components":null,"discoverer_code":"SKF1267","separation_arcsec":10.4,"position_angle_deg":70}],"mass_solar":1.137,"radius_solar":1.276,"spectral_type":"F6/7V","uncertainties":{"metallicity_fe_h":[0.07,0.07]},"color_index_bv":0.527,"luminosity_solar":2.0007830521523893,"metallicity_fe_h":-0.01,"radial_velocity_km_s":29.1,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality D)","surface_gravity_log_g":4.195,"surface_temperature_k":6127,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":110.66,"proper_motion_dec_mas_yr":60.56,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":2.0529},"designations":[{"catalog":"HD","designation":"HD 8985"},{"catalog":"HIP","designation":"HIP 6854"}],"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."}