{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T23:20:04.813Z","years_from_j2000":26.682,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, 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. 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":"albireo-b","name":"Albireo B","class":"b8ve_blue_white_main_sequence_star","category":"star","object_type":"B8Ve blue-white main-sequence star","mag":5.12,"mag_band":"V","abs_mag":-0.322,"abs_mag_band":"V","distance_ly":399.7013793280919,"distance_method":"parallax","ra_deg":292.68915,"dec_deg":27.965276,"epoch_ra_deg":292.959612,"epoch_dec_deg":28.021171,"epoch_moved_arcsec":0.058,"pm_ra_mas_yr":-1.95,"pm_dec_mas_yr":-0.98,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/albireo-b","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":230976760,"mass_solar":3.28,"radius_solar":3.657,"spectral_type":"B8Ve","color_index_bv":-0.095,"luminosity_solar":117.16556739113025,"radial_velocity_km_s":-18,"spectral_type_source":"SIMBAD (2006MNRAS.371..252L, quality C)","surface_gravity_log_g":3.724,"surface_temperature_k":11186,"proper_motion_ra_mas_yr":-1.95,"proper_motion_dec_mas_yr":-0.98,"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":178.6183},"designations":[{"catalog":"Bayer/Flamsteed","designation":"6 Beta2 Cyg"},{"catalog":"Common name","designation":"Albireo B"},{"catalog":"HD","designation":"HD 183914"},{"catalog":"HIP","designation":"HIP 95951"},{"catalog":"HR","designation":"HR 7418"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}