{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T17:25:34.297Z","years_from_j2000":26.675,"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-119126","name":"2 Boo","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":5.63,"mag_band":"V","abs_mag":0.566,"abs_mag_band":"V","distance_ly":335.89736409363167,"distance_method":"parallax","ra_deg":205.25979,"dec_deg":22.495768,"epoch_ra_deg":205.578143,"epoch_dec_deg":22.359549,"epoch_moved_arcsec":0.811,"pm_ra_mas_yr":-15.28,"pm_dec_mas_yr":-26.28,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Boötes","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-119126","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":345388200,"mass_solar":3.102,"radius_solar":11.849,"spectral_type":"K0III","uncertainties":{"metallicity_fe_h":[0.052,0.052]},"color_index_bv":1.009,"luminosity_solar":51.713031791696295,"metallicity_fe_h":-0.05,"radial_velocity_km_s":5,"spectral_type_source":"SIMBAD (1979PASP...91...83C, quality C)","surface_gravity_log_g":2.523,"surface_temperature_k":4833,"metallicity_fe_h_source":"Median of 5 spectroscopic determinations in 6 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-15.28,"proper_motion_dec_mas_yr":-26.28,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":69.6913},"designations":[{"catalog":"Bayer/Flamsteed","designation":"2 Boo"},{"catalog":"HD","designation":"HD 119126"},{"catalog":"HIP","designation":"HIP 66763"},{"catalog":"HR","designation":"HR 5149"}],"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."}