{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.663","julian_year":2026.663,"time":"2026-08-31T03:30:47.705Z","years_from_j2000":26.663,"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":"kepler-26-e","name":"Kepler-26 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":1093.625165430681,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":284.9410627,"dec_deg":46.5664505,"epoch_ra_deg":285.13184,"epoch_dec_deg":46.602977,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-26","semi_major_axis_km":32911531.553999998,"periapsis_km":null,"mass_kg":3.816215267518691e+25,"mass_msun":0.0000191923,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-26-e","radius_km":15371.221000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-26","host_v_mag":15.853,"eccentricity":0,"uncertainties":{"radius_km":[956.715,956.715],"distance_ly":[9.968969684912263,9.968969684912263],"host_mass_solar":[0.016,0.016],"host_radius_solar":[0.027,0.027],"host_temperature_k":[116,116],"orbital_period_days":[0.000173,0.000173]},"host_mass_solar":0.593,"inclination_deg":89.87,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.571,"planets_in_system":4,"discovery_facility":"Kepler","host_spectral_type":"M0 V","host_temperature_k":4486,"orbital_period_days":46.827915,"transit_midpoint_bjd":2454969.74318,"equilibrium_temperature_k":276},"designations":[{"catalog":"Exoplanet","designation":"Kepler-26 e"}],"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."}