{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T23:45:12.726Z","years_from_j2000":26.665,"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-108236-e","name":"HD 108236 e","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":210.6898445647065,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":186.5740627,"dec_deg":-51.3630519,"epoch_ra_deg":186.9372,"epoch_dec_deg":-51.511745,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 108236","semi_major_axis_km":20450028.924689997,"periapsis_km":null,"mass_kg":5.79897499962543e+25,"mass_msun":0.0000291639,"constellation":"Centaurus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-108236-e","radius_km":19663.682300000004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 108236","host_v_mag":9.25,"eccentricity":0.058,"uncertainties":{"radius_km":[331.6612,331.6612],"distance_ly":[0.6301341217487483,0.6337218419036325],"eccentricity":[0.036,0.032],"host_mass_solar":[0.048,0.05],"inclination_deg":[0.086,0.12],"host_radius_solar":[0.008,0.008],"host_temperature_k":[61,61],"semi_major_axis_km":[299195.7414,329115.31554],"orbital_period_days":[0.000089,0.000083],"argument_of_periastron_deg":[54,37]},"host_mass_solar":0.869,"inclination_deg":89.245,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.877,"planets_in_system":5,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G3 V","host_temperature_k":5660,"orbital_period_days":19.590025,"transit_midpoint_bjd":2458782.46935,"equilibrium_temperature_k":636,"argument_of_periastron_deg":128},"designations":[{"catalog":"Exoplanet","designation":"HD 108236 e"},{"catalog":"Host star","designation":"HD 108236"}],"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":"2026-08-30T09:56:50.739Z","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."}