{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:59:10.460Z","years_from_j2000":26.68,"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":"hip-78688","name":"HIP 78688","class":"k2_orange_star","category":"star","object_type":"K2 orange star","mag":9.11,"mag_band":"V","abs_mag":5.793,"abs_mag_band":"V","distance_ly":150.2331722347532,"distance_method":"parallax","ra_deg":240.95545500000003,"dec_deg":14.107952,"epoch_ra_deg":241.268176,"epoch_dec_deg":14.032699,"epoch_moved_arcsec":5.147,"pm_ra_mas_yr":138.4,"pm_dec_mas_yr":-134.39,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Serpens","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-78688","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"16038+1406","companions":[{"measured":2024,"magnitude":12.23,"components":null,"discoverer_code":"HDS2265","separation_arcsec":0.2,"position_angle_deg":311}],"spectral_type":"K2","color_index_bv":0.974,"luminosity_solar":0.4195657223387252,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","proper_motion_ra_mas_yr":138.4,"proper_motion_dec_mas_yr":-134.39},"designations":[{"catalog":"HIP","designation":"HIP 78688"}],"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."}