{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T07:37:55.624Z","years_from_j2000":26.666,"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-158259-e","name":"HD 158259 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":88.22464785962366,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":261.3495847,"dec_deg":52.7904721,"epoch_ra_deg":261.499468,"epoch_dec_deg":52.765894,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 158259","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":3.6310780636171586e+25,"mass_msun":0.0000182612,"constellation":"Draco","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-158259-e","radius_km":14924.754,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 158259","host_v_mag":6.47915,"uncertainties":{"mass_kg":[6.151332903825121e+24,5.613837795723896e+24],"distance_ly":[0.07012362120909983,0.07012362120909983],"host_mass_solar":[0.1,0.1],"host_radius_solar":[0.08,0.03],"host_temperature_k":[124.62,124.62],"orbital_period_days":[0.0021,0.0022]},"host_mass_solar":1.08,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.21,"planets_in_system":5,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"G0","host_temperature_k":5801.89,"orbital_period_days":7.951},"designations":[{"catalog":"Exoplanet","designation":"HD 158259 e"},{"catalog":"Host star","designation":"HD 158259"}],"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."}