{"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":"2026-09-03T00:42:56.268Z","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-157346","name":"HD 157346","class":"k2_3iii_orange_giant","category":"star","object_type":"K2/3III orange giant","mag":8.02,"mag_band":"V","abs_mag":2.369,"abs_mag_band":"V","distance_ly":440.1571641073213,"distance_method":"parallax","ra_deg":260.685225,"dec_deg":-0.894066,"epoch_ra_deg":261.031441,"epoch_dec_deg":-0.9207,"epoch_moved_arcsec":2.271,"pm_ra_mas_yr":-19.8,"pm_dec_mas_yr":-82.83,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ophiuchus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-157346","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K2/3III","color_index_bv":1.395,"luminosity_solar":9.826525828295317,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality D)","proper_motion_ra_mas_yr":-19.8,"proper_motion_dec_mas_yr":-82.83},"designations":[{"catalog":"HD","designation":"HD 157346"},{"catalog":"HIP","designation":"HIP 85028"}],"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."}