{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T08:28:40.966Z","years_from_j2000":26.672,"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-136512","name":"1 ο CrB","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":5.51,"mag_band":"V","abs_mag":0.92,"abs_mag_band":"V","distance_ly":269.9971418195859,"distance_method":"parallax","ra_deg":230.03571,"dec_deg":29.616209,"epoch_ra_deg":230.314444,"epoch_dec_deg":29.518394,"epoch_moved_arcsec":3.359,"pm_ra_mas_yr":-118.74,"pm_dec_mas_yr":-42.02,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corona Borealis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-136512","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15201+2937","companions":[{"measured":2020,"magnitude":10.46,"components":null,"discoverer_code":"ENG  53","separation_arcsec":144.1,"position_angle_deg":343}],"spectral_type":"K0III","color_index_bv":1.015,"luminosity_solar":37.32501577957206,"radial_velocity_km_s":-53,"spectral_type_source":"SIMBAD (1955ApJS....2..195R, quality C)","proper_motion_ra_mas_yr":-118.74,"proper_motion_dec_mas_yr":-42.02},"designations":[{"catalog":"Bayer/Flamsteed","designation":"1 Omicron CrB"},{"catalog":"Exoplanet host","designation":"ο CrB"},{"catalog":"HD","designation":"HD 136512"},{"catalog":"HIP","designation":"HIP 75049"},{"catalog":"HR","designation":"HR 5709"}],"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."}