{"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":"2026-10-24T23:15:45.787Z","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-105028","name":"HD 105028","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":7.39,"mag_band":"V","abs_mag":0.172,"abs_mag_band":"V","distance_ly":905.9900105812601,"distance_method":"parallax","ra_deg":181.38967499999998,"dec_deg":68.794303,"epoch_ra_deg":181.730246,"epoch_dec_deg":68.643956,"epoch_moved_arcsec":0.763,"pm_ra_mas_yr":-6.1,"pm_dec_mas_yr":-27.78,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-105028","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":"12056+6848","companions":[{"measured":2021,"magnitude":10.67,"components":"AB","discoverer_code":"STF1599","separation_arcsec":10.1,"position_angle_deg":166},{"measured":2017,"magnitude":12.65,"components":"AC","discoverer_code":"STF1599","separation_arcsec":108.4,"position_angle_deg":332},{"measured":2017,"magnitude":7.94,"components":"AE","discoverer_code":"STF1599","separation_arcsec":125.3,"position_angle_deg":182},{"measured":2017,"magnitude":9.19,"components":"AD","discoverer_code":"STF1599","separation_arcsec":125.6,"position_angle_deg":86},{"measured":2017,"magnitude":12.28,"components":"AF","discoverer_code":"WAL  60","separation_arcsec":142.5,"position_angle_deg":109}],"spectral_type":"K0III","color_index_bv":1.074,"luminosity_solar":74.33613896551785,"radial_velocity_km_s":-24,"spectral_type_source":"SIMBAD (quality D)","proper_motion_ra_mas_yr":-6.1,"proper_motion_dec_mas_yr":-27.78},"designations":[{"catalog":"HD","designation":"HD 105028"},{"catalog":"HIP","designation":"HIP 58979"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 105028 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-105028","bibtex":"@misc{spacecatalog_hd-105028,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 105028}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-105028},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-105028","release":"DR1","doi":null},"references":[],"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."}