{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T20:17:17.463Z","years_from_j2000":26.67,"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-94028","name":"HD 94028","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":8.21,"mag_band":"V","abs_mag":4.832,"abs_mag_band":"V","distance_ly":154.5032115318208,"distance_method":"parallax","ra_deg":162.86722500000002,"dec_deg":20.27749,"epoch_ra_deg":163.226031,"epoch_dec_deg":20.131799,"epoch_moved_arcsec":14.032,"pm_ra_mas_yr":-261.86,"pm_dec_mas_yr":-456.33,"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-94028","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"mass_solar":1.107,"radius_solar":0.956,"spectral_type":"F8","uncertainties":{"metallicity_fe_h":[0.125,0.125]},"color_index_bv":0.498,"luminosity_solar":1.0167168004663756,"metallicity_fe_h":-1.435,"radial_velocity_km_s":64.2,"spectral_type_source":"SIMBAD (1985ApJS...59..197B, quality D)","surface_gravity_log_g":4.401,"surface_temperature_k":6111,"metallicity_fe_h_source":"Median of 30 spectroscopic determinations in 37 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-261.86,"proper_motion_dec_mas_yr":-456.33,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1.1554},"designations":[{"catalog":"HD","designation":"HD 94028"},{"catalog":"HIP","designation":"HIP 53070"}],"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."}