{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:35:07.577Z","years_from_j2000":26.68,"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-82668","name":"N Vel","class":"k5iii_orange_giant","category":"star","object_type":"K5III orange giant","mag":3.16,"mag_band":"V","abs_mag":-1.164,"abs_mag_band":"V","distance_ly":238.94248847166392,"distance_method":"parallax","ra_deg":142.805565,"dec_deg":-57.034377,"epoch_ra_deg":143.007105,"epoch_dec_deg":-57.152243,"epoch_moved_arcsec":0.884,"pm_ra_mas_yr":-32.58,"pm_dec_mas_yr":6.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-82668","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K5III","uncertainties":{"metallicity_fe_h":[0.25,0.25]},"color_index_bv":1.538,"luminosity_solar":254.4485615146634,"metallicity_fe_h":-0.18,"variability_type":"CST:","variable_mag_max":3.149,"variable_mag_min":3.169,"variability_class":"Not variable (GCVS)","radial_velocity_km_s":-14,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","variable_designation":"N Vel","surface_gravity_log_g":0.88,"surface_temperature_k":4105,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-32.58,"proper_motion_dec_mas_yr":6.08,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 82668"},{"catalog":"HIP","designation":"HIP 46701"},{"catalog":"HR","designation":"HR 3803"},{"catalog":"Variable star","designation":"N Vel"}],"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."}