{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T04:35:22.057Z","years_from_j2000":26.677,"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-144628","name":"HD 144628","class":"k2v_orange_dwarf","category":"star","object_type":"K2V orange dwarf","mag":7.11,"mag_band":"V","abs_mag":6.278,"abs_mag_band":"V","distance_ly":47.844531360024526,"distance_method":"parallax","ra_deg":242.42857500000002,"dec_deg":-56.445149,"epoch_ra_deg":242.969879,"epoch_dec_deg":-56.513288,"epoch_moved_arcsec":9.634,"pm_ra_mas_yr":-136.14,"pm_dec_mas_yr":334.48,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Norma","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-144628","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":2718188800,"mass_solar":0.828,"radius_solar":0.757,"spectral_type":"K2V","uncertainties":{"metallicity_fe_h":[0.045,0.045]},"color_index_bv":0.856,"luminosity_solar":0.2684108083545227,"metallicity_fe_h":-0.41,"radial_velocity_km_s":37.9,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":4.548,"surface_temperature_k":4986,"metallicity_fe_h_source":"Median of 11 spectroscopic determinations in 14 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-136.14,"proper_motion_dec_mas_yr":334.48,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3186},"designations":[{"catalog":"Gliese","designation":"Gl 613"},{"catalog":"HD","designation":"HD 144628"},{"catalog":"HIP","designation":"HIP 79190"}],"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."}