{"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":"2026-08-31T03:31:37.707Z","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-305-e","name":"Kepler-305 e","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2832.5931245030415,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":299.2242557,"dec_deg":40.343167,"epoch_ra_deg":299.456455,"epoch_dec_deg":40.414371,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-305","semi_major_axis_km":6009346.466018999,"periapsis_km":null,"mass_kg":2.311228964835264e+25,"mass_msun":0.0000116235,"constellation":"Cygnus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/kepler-305-e","radius_km":11441.13336493,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-305","host_v_mag":15.851,"eccentricity":0,"uncertainties":{"distance_ly":[81.95005146510896,86.88805902374045],"host_temperature_k":[123,123],"semi_major_axis_km":[53855.233452,53855.233452]},"host_mass_solar":0.82,"inclination_deg":87.1,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.827279,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":4974,"orbital_period_days":3.20538,"transit_midpoint_bjd":2455187.631,"equilibrium_temperature_k":1000},"designations":[{"catalog":"Exoplanet","designation":"Kepler-305 e"},{"catalog":"Host star","designation":"Kepler-305"}],"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."}