{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.805","julian_year":2026.805,"time":"2026-10-21T21:33:27.619Z","years_from_j2000":26.805,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, 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. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. 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-72634","name":"HD 72634","class":"apcreusr_white_star","category":"star","object_type":"ApCrEuSr white star","mag":7.28,"mag_band":"V","abs_mag":-0.095,"abs_mag_band":"V","distance_ly":973.6012492128078,"distance_method":"parallax","ra_deg":127.42891499999999,"dec_deg":-67.139795,"epoch_ra_deg":127.48772,"epoch_dec_deg":-67.229206,"epoch_moved_arcsec":0.551,"pm_ra_mas_yr":-11.25,"pm_dec_mas_yr":17.22,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Volans","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-72634","source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0","attribution":"HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08297-6708","companions":[{"measured":2022,"magnitude":8.48,"components":"Aa,Ab","discoverer_code":"HDS1215","separation_arcsec":0.2,"position_angle_deg":81},{"measured":2022,"magnitude":12.5,"components":"Aa,C","discoverer_code":"HDS1215","separation_arcsec":1.1,"position_angle_deg":65},{"measured":2015,"magnitude":11.8,"components":"AB","discoverer_code":"HJ 4110","separation_arcsec":26.2,"position_angle_deg":211}],"spectral_type":"ApCrEuSr","color_index_bv":0.023,"luminosity_solar":95.0604793656281,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality D)","proper_motion_ra_mas_yr":-11.25,"proper_motion_dec_mas_yr":17.22},"designations":[{"catalog":"HD","designation":"HD 72634"},{"catalog":"HIP","designation":"HIP 41667"}],"updated_at":"2026-10-01T09:42:28.932Z","attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}