{"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":"2026-09-06T23:33:38.628Z","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":"hd-216763","name":"23 δ PsA","class":"g8iii_yellow_giant","category":"star","object_type":"G8III yellow giant","mag":4.2,"mag_band":"V","abs_mag":0.828,"abs_mag_band":"V","distance_ly":154.13824254515578,"distance_method":"parallax","ra_deg":343.98708,"dec_deg":-32.539628,"epoch_ra_deg":344.358767,"epoch_dec_deg":-32.396131,"epoch_moved_arcsec":0.859,"pm_ra_mas_yr":10.84,"pm_dec_mas_yr":30.32,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Piscis Austrinus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-216763","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"22559-3232","companions":[{"measured":2016,"magnitude":9.2,"components":null,"discoverer_code":"HWE  91","separation_arcsec":4.9,"position_angle_deg":250}],"spectral_type":"G8III","uncertainties":{"metallicity_fe_h":[0.061,0.061]},"color_index_bv":0.952,"luminosity_solar":40.625619818684335,"metallicity_fe_h":-0.21,"radial_velocity_km_s":-12,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality C)","surface_gravity_log_g":2.72,"surface_temperature_k":4841,"metallicity_fe_h_source":"Median of 5 spectroscopic determinations in 5 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":10.84,"proper_motion_dec_mas_yr":30.32,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"23 Delta PsA"},{"catalog":"HD","designation":"HD 216763"},{"catalog":"HIP","designation":"HIP 113246"},{"catalog":"HR","designation":"HR 8720"}],"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."}