{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T16:28:50.339Z","years_from_j2000":26.67,"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-57006","name":"HD 57006","class":"f8iv_yellow_white_subgiant","category":"star","object_type":"F8IV yellow-white subgiant","mag":5.91,"mag_band":"V","abs_mag":2.276,"abs_mag_band":"V","distance_ly":173.85733098553237,"distance_method":"parallax","ra_deg":109.948515,"dec_deg":7.142947,"epoch_ra_deg":110.310614,"epoch_dec_deg":7.093229,"epoch_moved_arcsec":2.271,"pm_ra_mas_yr":61.2,"pm_dec_mas_yr":-59.18,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Canis Minor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-57006","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":2246886300,"mass_solar":1.592,"radius_solar":2.871,"spectral_type":"F8IV","uncertainties":{"metallicity_fe_h":[0.03,0.03]},"color_index_bv":0.537,"luminosity_solar":10.705328538333623,"metallicity_fe_h":-0.02,"radial_velocity_km_s":22,"spectral_type_source":"SIMBAD (1981AJ.....86.1896H, quality C)","surface_gravity_log_g":3.798,"surface_temperature_k":6094,"metallicity_fe_h_source":"Median of 7 spectroscopic determinations in 9 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":61.2,"proper_motion_dec_mas_yr":-59.18,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":10.3602},"designations":[{"catalog":"HD","designation":"HD 57006"},{"catalog":"HIP","designation":"HIP 35509"},{"catalog":"HR","designation":"HR 2779"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}