{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T20:42:46.035Z","years_from_j2000":26.681,"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":"hd-211924","name":"30 Peg","class":"b5iii_blue_white_giant","category":"star","object_type":"B5III blue-white giant","mag":5.37,"mag_band":"V","abs_mag":-2.589,"abs_mag_band":"V","distance_ly":1274.048350456029,"distance_method":"parallax","ra_deg":335.11490999999995,"dec_deg":5.789498,"epoch_ra_deg":335.452657,"epoch_dec_deg":5.924418,"epoch_moved_arcsec":0.545,"pm_ra_mas_yr":20.33,"pm_dec_mas_yr":2.1,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-211924","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"22205+0547","companions":[{"measured":2013,"magnitude":11.5,"components":"AB","discoverer_code":"HJ  962","separation_arcsec":6.4,"position_angle_deg":17},{"measured":2013,"magnitude":11.32,"components":"AC","discoverer_code":"HJ  962","separation_arcsec":18,"position_angle_deg":228}],"spectral_type":"B5III","color_index_bv":-0.037,"luminosity_solar":945.3660459579653,"radial_velocity_km_s":-8,"spectral_type_source":"SIMBAD (2024A&A...690A.176N, quality C)","surface_gravity_log_g":3.46,"surface_temperature_k":13881,"proper_motion_ra_mas_yr":20.33,"proper_motion_dec_mas_yr":2.1,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"30 Peg"},{"catalog":"HD","designation":"HD 211924"},{"catalog":"HIP","designation":"HIP 110298"},{"catalog":"HR","designation":"HR 8513"}],"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."}