{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T04:55:03.922Z","years_from_j2000":26.669,"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-1942","name":"HD 1942","class":"g_yellow_star","category":"star","object_type":"G yellow star","mag":8.25,"mag_band":"V","abs_mag":3.613,"abs_mag_band":"V","distance_ly":275.93612330143014,"distance_method":"parallax","ra_deg":5.97177,"dec_deg":29.50252,"epoch_ra_deg":6.32391,"epoch_dec_deg":29.651351,"epoch_moved_arcsec":1.119,"pm_ra_mas_yr":41.8,"pm_dec_mas_yr":-3.47,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Andromeda","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-1942","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00239+2930","companions":[{"measured":2021,"magnitude":8.55,"components":"AB","discoverer_code":"STF  28","separation_arcsec":33,"position_angle_deg":224},{"measured":2016,"magnitude":8.92,"components":"AC","discoverer_code":"FYM  12","separation_arcsec":145.9,"position_angle_deg":137}],"spectral_type":"G","color_index_bv":0.541,"luminosity_solar":3.12464008580611,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":41.8,"proper_motion_dec_mas_yr":-3.47},"designations":[{"catalog":"HD","designation":"HD 1942"},{"catalog":"HIP","designation":"HIP 1891"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}