{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T13:06:03.230Z","years_from_j2000":26.683,"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-134180","name":"HD 134180","class":"k2_5v_orange_dwarf","category":"star","object_type":"K2.5V orange dwarf","mag":9.41,"mag_band":"V","abs_mag":6.511,"abs_mag_band":"V","distance_ly":123.9668206680907,"distance_method":"parallax","ra_deg":227.58474,"dec_deg":-49.899808,"epoch_ra_deg":228.057017,"epoch_dec_deg":-50.002728,"epoch_moved_arcsec":5.444,"pm_ra_mas_yr":-175.11,"pm_dec_mas_yr":-104.73,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lupus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-134180","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15103-4954","companions":[{"measured":2005,"magnitude":15.9,"components":"Aa,Ab","discoverer_code":"EGN  15","separation_arcsec":0.9,"position_angle_deg":247},{"measured":2015,"magnitude":14.6,"components":"AB","discoverer_code":"EGN  15","separation_arcsec":13.3,"position_angle_deg":313}],"radius_solar":0.784,"spectral_type":"K2.5V","color_index_bv":0.99,"luminosity_solar":0.21657084947100733,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.556,"surface_temperature_k":4796,"proper_motion_ra_mas_yr":-175.11,"proper_motion_dec_mas_yr":-104.73,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.2922},"designations":[{"catalog":"HD","designation":"HD 134180"},{"catalog":"HIP","designation":"HIP 74243"}],"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."}