{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T11:48:48.919Z","years_from_j2000":26.667,"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-29613","name":"HD 29613","class":"k0_5iva_orange_subgiant","category":"star","object_type":"K0.5IVa orange subgiant","mag":5.46,"mag_band":"V","abs_mag":1.564,"abs_mag_band":"V","distance_ly":196.12533151776532,"distance_method":"parallax","ra_deg":69.832125,"dec_deg":-14.359192,"epoch_ra_deg":70.141353,"epoch_dec_deg":-14.306795,"epoch_moved_arcsec":4.649,"pm_ra_mas_yr":121.08,"pm_dec_mas_yr":-125.41,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-29613","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K0.5IVa","uncertainties":{"metallicity_fe_h":[0.036,0.036]},"color_index_bv":1.054,"luminosity_solar":20.62528697846573,"metallicity_fe_h":-0.26,"radial_velocity_km_s":56,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":2.7,"surface_temperature_k":4656,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 3 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":121.08,"proper_motion_dec_mas_yr":-125.41,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 29613"},{"catalog":"HIP","designation":"HIP 21685"},{"catalog":"HR","designation":"HR 1487"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}