{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.819","julian_year":2026.819,"time":"2026-10-26T23:40:44.448Z","years_from_j2000":26.819,"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-119024","name":"82 UMa","class":"a2vnp_white_main_sequence_star","category":"star","object_type":"A2Vnp white main-sequence star","mag":5.46,"mag_band":"V","abs_mag":1.815,"abs_mag_band":"V","distance_ly":174.7891597566691,"distance_method":"parallax","ra_deg":204.87708,"dec_deg":52.921208,"epoch_ra_deg":205.139789,"epoch_dec_deg":52.784631,"epoch_moved_arcsec":3.95,"pm_ra_mas_yr":-136.05,"pm_dec_mas_yr":56.38,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-119024","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":"13395+5255","age_years":534364900,"companions":[{"measured":2009,"magnitude":20,"components":null,"discoverer_code":"VIG  16","separation_arcsec":7,"position_angle_deg":231}],"mass_solar":1.864,"radius_solar":1.815,"spectral_type":"A2Vnp","color_index_bv":0.113,"luminosity_solar":16.368165214278086,"radial_velocity_km_s":-15,"spectral_type_source":"SIMBAD (1995ApJS...99..135A, quality C)","surface_gravity_log_g":4.083,"surface_temperature_k":8402,"proper_motion_ra_mas_yr":-136.05,"proper_motion_dec_mas_yr":56.38,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":14.4985},"designations":[{"catalog":"Bayer/Flamsteed","designation":"82 UMa"},{"catalog":"HD","designation":"HD 119024"},{"catalog":"HIP","designation":"HIP 66634"},{"catalog":"HR","designation":"HR 5142"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. 82 UMa [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-119024","bibtex":"@misc{spacecatalog_hd-119024,\n  author       = {{SpaceCatalog}},\n  title        = {{82 UMa}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-119024},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-119024","release":"DR1","doi":null},"references":[{"bibcode":"1995ApJS...99..135A","ads_url":"https://ui.adsabs.harvard.edu/abs/1995ApJS...99..135A/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."}