{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.813","julian_year":2026.813,"time":"2026-10-25T02:49:37.116Z","years_from_j2000":26.813,"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-34545","name":"HD 34545","class":"k5_orange_star","category":"star","object_type":"K5 orange star","mag":7.36,"mag_band":"V","abs_mag":-0.85,"abs_mag_band":"V","distance_ly":1430.5104571924164,"distance_method":"parallax","ra_deg":80.02617000000001,"dec_deg":39.343387,"epoch_ra_deg":80.492721,"epoch_dec_deg":39.371065,"epoch_moved_arcsec":0.407,"pm_ra_mas_yr":-4.48,"pm_dec_mas_yr":14.51,"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-34545","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":"05201+3921","companions":[{"measured":2015,"magnitude":17,"components":"AR","discoverer_code":"FYM 372","separation_arcsec":16.2,"position_angle_deg":287},{"measured":2015,"magnitude":13.05,"components":"AB","discoverer_code":"HJ 3272","separation_arcsec":17.4,"position_angle_deg":343},{"measured":2015,"magnitude":15.4,"components":"AI","discoverer_code":"ABH  28","separation_arcsec":27,"position_angle_deg":146},{"measured":2015,"magnitude":11.1,"components":"AC","discoverer_code":"HJ 3272","separation_arcsec":28.2,"position_angle_deg":293},{"measured":2015,"magnitude":11.84,"components":"AD","discoverer_code":"HJ 3272","separation_arcsec":32.5,"position_angle_deg":46},{"measured":2015,"magnitude":13.1,"components":"AH","discoverer_code":"ABH  28","separation_arcsec":43.9,"position_angle_deg":198},{"measured":2015,"magnitude":11.7,"components":"AG","discoverer_code":"ABH  28","separation_arcsec":48.5,"position_angle_deg":215},{"measured":2015,"magnitude":12.6,"components":"AF","discoverer_code":"ABH  28","separation_arcsec":50.5,"position_angle_deg":234},{"measured":2015,"magnitude":12.23,"components":"AL","discoverer_code":"ABH  28","separation_arcsec":61.8,"position_angle_deg":290},{"measured":2015,"magnitude":14.9,"components":"AM","discoverer_code":"ABH  28","separation_arcsec":80.6,"position_angle_deg":286},{"measured":2016,"magnitude":12.9,"components":"AO","discoverer_code":"ABH  28","separation_arcsec":83.8,"position_angle_deg":253},{"measured":2016,"magnitude":14.1,"components":"AN","discoverer_code":"ABH  28","separation_arcsec":86.6,"position_angle_deg":275},{"measured":2015,"magnitude":11.97,"components":"AJ","discoverer_code":"ABH  28","separation_arcsec":86.8,"position_angle_deg":155},{"measured":2015,"magnitude":14.1,"components":"AK","discoverer_code":"ABH  28","separation_arcsec":89.9,"position_angle_deg":179},{"measured":2016,"magnitude":12.5,"components":"AP","discoverer_code":"ABH  28","separation_arcsec":120.8,"position_angle_deg":242},{"measured":2016,"magnitude":13.4,"components":"AQ","discoverer_code":"ABH  28","separation_arcsec":135,"position_angle_deg":226},{"measured":2016,"magnitude":9.16,"components":"AE","discoverer_code":"BUP  77","separation_arcsec":188,"position_angle_deg":318}],"mass_solar":6.193,"radius_solar":51.767,"spectral_type":"K5","color_index_bv":1.695,"luminosity_solar":190.54607179632464,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":1.692,"surface_temperature_k":4905,"proper_motion_ra_mas_yr":-4.48,"proper_motion_dec_mas_yr":14.51,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1420.2374},"designations":[{"catalog":"HD","designation":"HD 34545"},{"catalog":"HIP","designation":"HIP 24890"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 34545 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-34545","bibtex":"@misc{spacecatalog_hd-34545,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 34545}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-34545},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-34545","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."}