{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T11:05:08.740Z","years_from_j2000":26.667,"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-140232","name":"22 τ7 Ser","class":"a8vam_white_main_sequence_star","category":"star","object_type":"A8Vam white main-sequence star","mag":5.8,"mag_band":"V","abs_mag":2.175,"abs_mag_band":"V","distance_ly":173.11923910275937,"distance_method":"parallax","ra_deg":235.47798,"dec_deg":18.464037,"epoch_ra_deg":235.780739,"epoch_dec_deg":18.378168,"epoch_moved_arcsec":2.467,"pm_ra_mas_yr":-73,"pm_dec_mas_yr":56.85,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Serpens","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-140232","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15419+1828","age_years":799882200,"companions":[{"measured":2016,"magnitude":10.4,"components":"AB","discoverer_code":"DRS  17","separation_arcsec":2.4,"position_angle_deg":88},{"measured":2020,"magnitude":12.33,"components":"AC","discoverer_code":"TOK 302","separation_arcsec":249.2,"position_angle_deg":274}],"mass_solar":1.719,"radius_solar":1.813,"spectral_type":"A8Vam","color_index_bv":0.207,"luminosity_solar":11.748975549395297,"metallicity_fe_h":0.52,"radial_velocity_km_s":-30,"spectral_type_source":"SIMBAD (1970ApJS...19..281B, quality C)","surface_gravity_log_g":4.074,"surface_temperature_k":7811,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-73,"proper_motion_dec_mas_yr":56.85,"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; Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":10.7802},"designations":[{"catalog":"Bayer/Flamsteed","designation":"22 Tau7 Ser"},{"catalog":"HD","designation":"HD 140232"},{"catalog":"HIP","designation":"HIP 76878"},{"catalog":"HR","designation":"HR 5845"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}