{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.826","julian_year":2026.826,"time":"2026-10-29T18:42:51.081Z","years_from_j2000":26.826,"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-214168","name":"8 Lac","class":"b1_vs_blue_white_star","category":"star","object_type":"B1.Vs blue-white star","mag":6.6,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":338.96706,"dec_deg":39.628146,"epoch_ra_deg":339.266551,"epoch_dec_deg":39.767698,"epoch_moved_arcsec":0.415,"pm_ra_mas_yr":-14.36,"pm_dec_mas_yr":-5.71,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lacerta","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-214168","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":"22359+3938","companions":[{"measured":2025,"magnitude":10.38,"components":"BC","discoverer_code":"STF2922","separation_arcsec":27.8,"position_angle_deg":154},{"measured":2025,"magnitude":9.08,"components":"BD","discoverer_code":"A  1469","separation_arcsec":66.8,"position_angle_deg":130},{"measured":2012,"magnitude":10.97,"components":"BF","discoverer_code":"COM   8","separation_arcsec":127.6,"position_angle_deg":175},{"measured":2025,"magnitude":7.25,"components":"BE","discoverer_code":"A  1469","separation_arcsec":321.1,"position_angle_deg":242}],"mass_solar":6.717,"radius_solar":5.69,"spectral_type":"B1.Vs","color_index_bv":-0.148,"radial_velocity_km_s":-10,"spectral_type_source":"SIMBAD (1983ApJ...272..182A, quality C)","surface_gravity_log_g":3.773,"surface_temperature_k":18521,"proper_motion_ra_mas_yr":-14.36,"proper_motion_dec_mas_yr":-5.71,"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":2466.696},"designations":[{"catalog":"Bayer/Flamsteed","designation":"8 Lac"},{"catalog":"HD","designation":"HD 214168"},{"catalog":"HIP","designation":"HIP 111544"},{"catalog":"HR","designation":"HR 8603"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. 8 Lac [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-214168","bibtex":"@misc{spacecatalog_hd-214168,\n  author       = {{SpaceCatalog}},\n  title        = {{8 Lac}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-214168},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-214168","release":"DR1","doi":null},"references":[{"bibcode":"1983ApJ...272..182A","ads_url":"https://ui.adsabs.harvard.edu/abs/1983ApJ...272..182A/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."}