{"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":"2026-09-02T21:16:28.753Z","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-92769","name":"40 LMi","class":"a4vn_white_main_sequence_star","category":"star","object_type":"A4Vn white main-sequence star","mag":5.51,"mag_band":"V","abs_mag":2.087,"abs_mag_band":"V","distance_ly":157.79217244471644,"distance_method":"parallax","ra_deg":160.75786499999998,"dec_deg":26.325577,"epoch_ra_deg":161.126215,"epoch_dec_deg":26.184677,"epoch_moved_arcsec":2.963,"pm_ra_mas_yr":-99.56,"pm_dec_mas_yr":-49.34,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Leo Minor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-92769","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"10430+2620","age_years":729174400,"companions":[{"measured":2015,"magnitude":12.6,"components":"AB","discoverer_code":"BU  913","separation_arcsec":23.8,"position_angle_deg":108},{"measured":2015,"magnitude":13.5,"components":"AC","discoverer_code":"BU  913","separation_arcsec":41.6,"position_angle_deg":72},{"measured":2015,"magnitude":13,"components":"AD","discoverer_code":"BU  913","separation_arcsec":46.6,"position_angle_deg":285}],"mass_solar":1.741,"radius_solar":1.803,"spectral_type":"A4Vn","color_index_bv":0.16,"luminosity_solar":12.740896859191105,"metallicity_fe_h":-0.15,"radial_velocity_km_s":10,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":4.05,"surface_temperature_k":7924,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-99.56,"proper_motion_dec_mas_yr":-49.34,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":11.2232},"designations":[{"catalog":"Bayer/Flamsteed","designation":"40 LMi"},{"catalog":"HD","designation":"HD 92769"},{"catalog":"HIP","designation":"HIP 52422"},{"catalog":"HR","designation":"HR 4189"}],"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."}