{"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":"2026-09-01T15:37:48.316Z","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-138367","name":"HD 138367","class":"f7v_yellow_white_main_sequence_star","category":"star","object_type":"F7V yellow-white main-sequence star","mag":6.91,"mag_band":"V","abs_mag":3.668,"abs_mag_band":"V","distance_ly":145.15198202630404,"distance_method":"parallax","ra_deg":232.216905,"dec_deg":57.445179,"epoch_ra_deg":232.374613,"epoch_dec_deg":57.353156,"epoch_moved_arcsec":8.232,"pm_ra_mas_yr":-260.97,"pm_dec_mas_yr":164.86,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-138367","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15289+5727","age_years":3812370000,"companions":[{"measured":2017,"magnitude":12.42,"components":"AB","discoverer_code":"BU  945","separation_arcsec":40.2,"position_angle_deg":101},{"measured":2016,"magnitude":13.34,"components":"AC","discoverer_code":"FOX 189","separation_arcsec":64.2,"position_angle_deg":22},{"measured":2020,"magnitude":11.81,"components":"AD","discoverer_code":"GIC 128","separation_arcsec":185.4,"position_angle_deg":132}],"mass_solar":1.206,"radius_solar":1.458,"spectral_type":"F7V","uncertainties":{"metallicity_fe_h":[0.05,0.05]},"color_index_bv":0.49,"luminosity_solar":2.9702978440178627,"metallicity_fe_h":-0.04,"radial_velocity_km_s":-31.5,"spectral_type_source":"SIMBAD (1981ApJS...45..437A, quality C)","surface_gravity_log_g":4.073,"surface_temperature_k":6196,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-260.97,"proper_motion_dec_mas_yr":164.86,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":2.8065},"designations":[{"catalog":"HD","designation":"HD 138367"},{"catalog":"HIP","designation":"HIP 75783"}],"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."}