{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:44:36.867Z","years_from_j2000":26.678,"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":"hip-39669","name":"HIP 39669","class":"orange_star","category":"star","object_type":"Orange star","mag":9.92,"mag_band":"V","abs_mag":6.214,"abs_mag_band":"V","distance_ly":179.70042249232782,"distance_method":"parallax","ra_deg":121.59372000000002,"dec_deg":-0.113321,"epoch_ra_deg":121.938355,"epoch_dec_deg":-0.191799,"epoch_moved_arcsec":6.796,"pm_ra_mas_yr":111.03,"pm_dec_mas_yr":-229.28,"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/hip-39669","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08064-0007","age_years":5657108000,"companions":[{"measured":2016,"magnitude":16.08,"components":null,"discoverer_code":"NSN  93","separation_arcsec":6.7,"position_angle_deg":171}],"mass_solar":0.843,"radius_solar":0.822,"color_index_bv":0.91,"luminosity_solar":0.2847082159799285,"radial_velocity_km_s":0,"surface_gravity_log_g":4.523,"surface_temperature_k":5121,"proper_motion_ra_mas_yr":111.03,"proper_motion_dec_mas_yr":-229.28,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3935},"designations":[{"catalog":"HIP","designation":"HIP 39669"}],"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."}