{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.808","julian_year":2026.808,"time":"2026-10-23T04:23:42.662Z","years_from_j2000":26.808,"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-185756","name":"HD 185756","class":"a0_white_star","category":"star","object_type":"A0 white star","mag":7.51,"mag_band":"V","abs_mag":0.015,"abs_mag_band":"V","distance_ly":1028.8844290794182,"distance_method":"parallax","ra_deg":294.89665499999995,"dec_deg":29.748741,"epoch_ra_deg":295.163793,"epoch_dec_deg":29.810224,"epoch_moved_arcsec":0.086,"pm_ra_mas_yr":-0.51,"pm_dec_mas_yr":-3.16,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-185756","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":"19396+2945","companions":[{"measured":2015,"magnitude":null,"components":"Aa,Ab","discoverer_code":"STF2557","separation_arcsec":0.6,"position_angle_deg":334},{"measured":2015,"magnitude":10.23,"components":"AB","discoverer_code":"STF2557","separation_arcsec":11,"position_angle_deg":103},{"measured":2015,"magnitude":11.3,"components":"AC","discoverer_code":"BU   54","separation_arcsec":21.8,"position_angle_deg":304},{"measured":2015,"magnitude":14,"components":"AJ","discoverer_code":"BKO  77","separation_arcsec":27.9,"position_angle_deg":124},{"measured":2015,"magnitude":15,"components":"AL","discoverer_code":"BKO  77","separation_arcsec":30,"position_angle_deg":220},{"measured":2015,"magnitude":12.92,"components":"AG","discoverer_code":"ABH 124","separation_arcsec":39.4,"position_angle_deg":229},{"measured":2015,"magnitude":10.63,"components":"AD","discoverer_code":"ABH 124","separation_arcsec":47.8,"position_angle_deg":147},{"measured":2015,"magnitude":12.72,"components":"AE","discoverer_code":"ABH 124","separation_arcsec":65.7,"position_angle_deg":164},{"measured":2015,"magnitude":14.6,"components":"AK","discoverer_code":"BKO  77","separation_arcsec":69.2,"position_angle_deg":97},{"measured":2015,"magnitude":10.39,"components":"AF","discoverer_code":"ABH 124","separation_arcsec":89.2,"position_angle_deg":180},{"measured":2015,"magnitude":12.1,"components":"AI","discoverer_code":"ABH 124","separation_arcsec":100.5,"position_angle_deg":116},{"measured":2015,"magnitude":10.54,"components":"AH","discoverer_code":"ABH 124","separation_arcsec":103.6,"position_angle_deg":92},{"measured":2015,"magnitude":15.3,"components":"AM","discoverer_code":"BKO  77","separation_arcsec":111.9,"position_angle_deg":120}],"spectral_type":"A0","color_index_bv":-0.056,"luminosity_solar":85.90135215053961,"radial_velocity_km_s":-8,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":-0.51,"proper_motion_dec_mas_yr":-3.16},"designations":[{"catalog":"HD","designation":"HD 185756"},{"catalog":"HIP","designation":"HIP 96709"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 185756 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-185756","bibtex":"@misc{spacecatalog_hd-185756,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 185756}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-185756},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-185756","release":"DR1","doi":null},"references":[{"bibcode":"1993yCat.3135....0C","ads_url":"https://ui.adsabs.harvard.edu/abs/1993yCat.3135....0C/abstract","quantity":"properties.spectral_type_source"}],"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."}