{"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":"2026-09-02T11:39:46.133Z","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-37022","name":"41 θ¹ Ori B","class":"o7vp_blue_main_sequence_star","category":"star","object_type":"O7Vp blue main-sequence star","mag":5.13,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":83.818605,"dec_deg":-5.389696,"epoch_ra_deg":84.14863,"epoch_dec_deg":-5.371735,"epoch_moved_arcsec":0.025,"pm_ra_mas_yr":-0.92,"pm_dec_mas_yr":0.13,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Orion","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-37022","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05353-0523","companions":[{"measured":2022,"magnitude":11.5,"components":"CF","discoverer_code":"STF 748","separation_arcsec":4.6,"position_angle_deg":121},{"measured":2013,"magnitude":12.7,"components":"CZ","discoverer_code":"MZA  16","separation_arcsec":6.5,"position_angle_deg":338},{"measured":2013,"magnitude":16.7,"components":"CG","discoverer_code":"STF 748","separation_arcsec":7.7,"position_angle_deg":34},{"measured":2013,"magnitude":15.8,"components":"CH","discoverer_code":"STF 748","separation_arcsec":9.4,"position_angle_deg":269},{"measured":2021,"magnitude":6.38,"components":"CD","discoverer_code":"STF 748","separation_arcsec":13.8,"position_angle_deg":60},{"measured":2022,"magnitude":11.1,"components":"CE","discoverer_code":"STF 748","separation_arcsec":16.7,"position_angle_deg":321}],"spectral_type":"O7Vp","color_index_bv":0.02,"variable_mag_max":5.08,"variable_mag_min":5.22,"radial_velocity_km_s":33,"spectral_type_source":"SIMBAD (2011ApJS..193...24S, quality C)","proper_motion_ra_mas_yr":-0.92,"proper_motion_dec_mas_yr":0.13},"designations":[{"catalog":"HD","designation":"HD 37022"},{"catalog":"HIP","designation":"HIP 26221"},{"catalog":"HR","designation":"HR 1895"}],"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."}