{"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":"2026-09-02T19:13:24.384Z","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-2861","name":"HD 2861","class":"g6_8v_yellow_main_sequence_star","category":"star","object_type":"G6/8V yellow main-sequence star","mag":9.6,"mag_band":"V","abs_mag":5.44,"abs_mag_band":"V","distance_ly":221.5736828891142,"distance_method":"parallax","ra_deg":7.96308,"dec_deg":-27.828382,"epoch_ra_deg":8.298764,"epoch_dec_deg":-27.680034,"epoch_moved_arcsec":5.062,"pm_ra_mas_yr":189.69,"pm_dec_mas_yr":6.38,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sculptor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-2861","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00319-2750","companions":[{"measured":2024,"magnitude":11.8,"components":"Aa,Ab","discoverer_code":"GKM9010","separation_arcsec":0.1,"position_angle_deg":322},{"measured":2015,"magnitude":15.72,"components":"AB","discoverer_code":"LDS2134","separation_arcsec":35.5,"position_angle_deg":81}],"spectral_type":"G6/8V","color_index_bv":0.759,"luminosity_solar":0.5807644175213116,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality D)","proper_motion_ra_mas_yr":189.69,"proper_motion_dec_mas_yr":6.38},"designations":[{"catalog":"HD","designation":"HD 2861"},{"catalog":"HIP","designation":"HIP 2511"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T18:38:07.546Z","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."}