{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T06:57:09.716Z","years_from_j2000":26.674,"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-11683","name":"HD 11683","class":"k2_5vk_orange_dwarf","category":"star","object_type":"K2.5Vk: orange dwarf","mag":9.15,"mag_band":"V","abs_mag":6.378,"abs_mag_band":"V","distance_ly":116.90194737036833,"distance_method":"parallax","ra_deg":28.59243,"dec_deg":-15.723978,"epoch_ra_deg":28.919216,"epoch_dec_deg":-15.592826,"epoch_moved_arcsec":8.765,"pm_ra_mas_yr":298.51,"pm_dec_mas_yr":-137.31,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-11683","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01543-1543","age_years":11606952000,"companions":[{"measured":2016,"magnitude":13.91,"components":"AC","discoverer_code":"CHM   3","separation_arcsec":28.1,"position_angle_deg":219},{"measured":2015,"magnitude":10.07,"components":"AB","discoverer_code":"GAL 314","separation_arcsec":36.3,"position_angle_deg":0}],"mass_solar":0.779,"radius_solar":0.789,"spectral_type":"K2.5Vk:","uncertainties":{"metallicity_fe_h":[0.03,0.03]},"color_index_bv":0.887,"luminosity_solar":0.24479356661960658,"metallicity_fe_h":-0.23,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.52,"surface_temperature_k":4883,"metallicity_fe_h_source":"Median of 4 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":298.51,"proper_motion_dec_mas_yr":-137.31,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3177},"designations":[{"catalog":"HD","designation":"HD 11683"},{"catalog":"HIP","designation":"HIP 8881"}],"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."}