{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.830","julian_year":2026.83,"time":"2026-10-31T04:59:58.013Z","years_from_j2000":26.83,"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-34656","name":"HD 34656","class":"o7_5ii_f_blue_bright_giant","category":"star","object_type":"O7.5II(f) blue bright giant","mag":6.79,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":80.1795,"dec_deg":37.438666,"epoch_ra_deg":80.638548,"epoch_dec_deg":37.465754,"epoch_moved_arcsec":0.128,"pm_ra_mas_yr":0.75,"pm_dec_mas_yr":-4.72,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Auriga","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-34656","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":"05207+3726","companions":[{"measured":2009,"magnitude":11,"components":"Aa,Ab","discoverer_code":"TRN  18","separation_arcsec":0.3,"position_angle_deg":280},{"measured":2016,"magnitude":13.8,"components":"AB","discoverer_code":"TRN  18","separation_arcsec":2,"position_angle_deg":55},{"measured":2003,"magnitude":17,"components":"AC","discoverer_code":"TRN  18","separation_arcsec":3,"position_angle_deg":126},{"measured":2016,"magnitude":16.7,"components":"AD","discoverer_code":"TRN  18","separation_arcsec":5.9,"position_angle_deg":248},{"measured":2015,"magnitude":12,"components":"AE","discoverer_code":"BKO 209","separation_arcsec":8.7,"position_angle_deg":13},{"measured":2015,"magnitude":12.7,"components":"AF","discoverer_code":"SEI 201","separation_arcsec":24.7,"position_angle_deg":54}],"spectral_type":"O7.5II(f)","color_index_bv":0,"radial_velocity_km_s":-5,"spectral_type_source":"SIMBAD (2011ApJS..193...24S, quality C)","proper_motion_ra_mas_yr":0.75,"proper_motion_dec_mas_yr":-4.72},"designations":[{"catalog":"HD","designation":"HD 34656"},{"catalog":"HIP","designation":"HIP 24957"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 34656 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-34656","bibtex":"@misc{spacecatalog_hd-34656,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 34656}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-34656},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-34656","release":"DR1","doi":null},"references":[{"bibcode":"2011ApJS..193...24S","ads_url":"https://ui.adsabs.harvard.edu/abs/2011ApJS..193...24S/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."}