{"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":"2026-09-06T16:13:41.329Z","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":"wasp-108-b","name":"WASP-108 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":844.017689564057,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":195.8281644,"dec_deg":-49.6397727,"epoch_ra_deg":196.21848,"epoch_dec_deg":-49.784157,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-108","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":1.693127142959106e+27,"mass_msun":0.000851498,"constellation":"Centaurus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/wasp-108-b","radius_km":96514.19976549501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-108","host_v_mag":11.211,"eccentricity":0,"uncertainties":{"radius_km":[2859.6800048630002,2859.6800048630002],"distance_ly":[10.482665979816133,10.746852645766696],"inclination_deg":[0.7,0.7],"host_radius_solar":[0.070678,0.070678],"host_temperature_k":[202,202],"orbital_period_days":[4.8124e-7,4.8124e-7]},"host_mass_solar":1.167,"inclination_deg":89.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.34415,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F9","host_temperature_k":6783,"orbital_period_days":2.67555212374,"transit_midpoint_bjd":2456413.7949,"equilibrium_temperature_k":1589},"designations":[{"catalog":"Exoplanet","designation":"WASP-108 b"},{"catalog":"Host star","designation":"WASP-108"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"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."}