{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T00:51:43.350Z","years_from_j2000":26.671,"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-76369","name":"17 Hya","class":"ka4hf1mf2_ka1hf2mf3_yellow_white_star","category":"star","object_type":"kA4hF1mF2+kA1hF2mF3 yellow-white star","mag":6.07,"mag_band":"V","abs_mag":1.335,"abs_mag_band":"V","distance_ly":288.6340433986984,"distance_method":"parallax","ra_deg":133.873365,"dec_deg":-7.971153,"epoch_ra_deg":134.202082,"epoch_dec_deg":-8.073604,"epoch_moved_arcsec":0.732,"pm_ra_mas_yr":7.71,"pm_dec_mas_yr":-26.34,"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-76369","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08555-0758","companions":[{"measured":2021,"magnitude":6.93,"components":null,"discoverer_code":"STF1295","separation_arcsec":4,"position_angle_deg":4}],"spectral_type":"kA4hF1mF2+kA1hF2mF3","color_index_bv":0.22,"luminosity_solar":25.468302525850405,"radial_velocity_km_s":-20,"spectral_type_source":"SIMBAD (1995ApJS...99..135A, quality D)","proper_motion_ra_mas_yr":7.71,"proper_motion_dec_mas_yr":-26.34},"designations":[{"catalog":"Bayer/Flamsteed","designation":"17 Hya"},{"catalog":"HD","designation":"HD 76369"},{"catalog":"HIP","designation":"HIP 43822"},{"catalog":"HR","designation":"HR 3552"}],"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."}