{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T05:15:23.979Z","years_from_j2000":26.674,"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-47028","name":"HD 47028","class":"k1_2iii_orange_giant","category":"star","object_type":"K1/2III orange giant","mag":8.83,"mag_band":"V","abs_mag":-1.085,"abs_mag_band":"V","distance_ly":3136.119141951909,"distance_method":"parallax","ra_deg":98.17942500000001,"dec_deg":-59.263978,"epoch_ra_deg":98.27388,"epoch_dec_deg":-59.283065,"epoch_moved_arcsec":0.285,"pm_ra_mas_yr":-9.36,"pm_dec_mas_yr":5.15,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pictor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-47028","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K1/2III","color_index_bv":1.329,"luminosity_solar":236.59196974857588,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality D)","proper_motion_ra_mas_yr":-9.36,"proper_motion_dec_mas_yr":5.15},"designations":[{"catalog":"HD","designation":"HD 47028"},{"catalog":"HIP","designation":"HIP 31198"}],"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."}