{"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":"2026-09-02T10:09:25.278Z","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-72108","name":"HD 72108","class":"b1_5v_b4v_blue_white_main_sequence_star","category":"star","object_type":"B1.5V+B4V blue-white main-sequence star","mag":5.33,"mag_band":"V","abs_mag":-3.747,"abs_mag_band":"V","distance_ly":2131.7411246249935,"distance_method":"parallax","ra_deg":127.26981,"dec_deg":-47.928923,"epoch_ra_deg":127.480381,"epoch_dec_deg":-48.017775,"epoch_moved_arcsec":0.274,"pm_ra_mas_yr":-7.77,"pm_dec_mas_yr":6.72,"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-72108","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08291-4756","companions":[{"measured":2025,"magnitude":6.4,"components":"Aa,Ab","discoverer_code":"FIN 315","separation_arcsec":0.1,"position_angle_deg":51},{"measured":2008,"magnitude":7.17,"components":"AB","discoverer_code":"HJ 4104","separation_arcsec":3.5,"position_angle_deg":244},{"measured":2009,"magnitude":9.23,"components":"AC","discoverer_code":"HJ 4104","separation_arcsec":19.6,"position_angle_deg":40}],"spectral_type":"B1.5V+B4V","color_index_bv":-0.14,"luminosity_solar":2746.6289924159587,"radial_velocity_km_s":29,"spectral_type_source":"SIMBAD (1984ApJS...55..657C, quality C)","proper_motion_ra_mas_yr":-7.77,"proper_motion_dec_mas_yr":6.72},"designations":[{"catalog":"HD","designation":"HD 72108"},{"catalog":"HIP","designation":"HIP 41616"},{"catalog":"HR","designation":"HR 3358"}],"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."}