{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T19:23:31.955Z","years_from_j2000":26.673,"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-335828","name":"HD 335828","class":"k4v_orange_dwarf","category":"star","object_type":"K4V orange dwarf","mag":9.59,"mag_band":"V","abs_mag":7.098,"abs_mag_band":"V","distance_ly":102.75882836343717,"distance_method":"parallax","ra_deg":274.45741499999997,"dec_deg":26.671306,"epoch_ra_deg":274.72923,"epoch_dec_deg":26.681763,"epoch_moved_arcsec":9.163,"pm_ra_mas_yr":327.53,"pm_dec_mas_yr":103.68,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hercules","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-335828","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18178+2640","companions":[{"measured":2016,"magnitude":17.09,"components":null,"discoverer_code":"LEP  88","separation_arcsec":39.8,"position_angle_deg":241}],"spectral_type":"K4V","color_index_bv":1.009,"luminosity_solar":0.12612465753175384,"variable_mag_max":9.526,"variable_mag_min":9.646,"radial_velocity_km_s":-49,"spectral_type_source":"SIMBAD (1986AJ.....92..139S, quality C)","proper_motion_ra_mas_yr":327.53,"proper_motion_dec_mas_yr":103.68},"designations":[{"catalog":"Gliese","designation":"GJ 4047"},{"catalog":"HD","designation":"HD 335828"},{"catalog":"HIP","designation":"HIP 89656"}],"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."}