{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T09:51:00.959Z","years_from_j2000":26.669,"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-101758","name":"HD 101758","class":"k0iv_orange_subgiant","category":"star","object_type":"K0IV orange subgiant","mag":7.44,"mag_band":"V","abs_mag":-1.957,"abs_mag_band":"V","distance_ly":2470.8817877386405,"distance_method":"parallax","ra_deg":175.64764499999998,"dec_deg":-29.639521,"epoch_ra_deg":175.984876,"epoch_dec_deg":-29.788859,"epoch_moved_arcsec":2.838,"pm_ra_mas_yr":88.98,"pm_dec_mas_yr":-58.37,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-101758","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K0IV","color_index_bv":1.263,"luminosity_solar":528.201949769997,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality C)","proper_motion_ra_mas_yr":88.98,"proper_motion_dec_mas_yr":-58.37},"designations":[{"catalog":"HD","designation":"HD 101758"},{"catalog":"HIP","designation":"HIP 57118"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}