{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-05T00:06:48.677Z","years_from_j2000":26.676,"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-427-b","name":"Kepler-427 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3319.6196124010144,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":288.2545808,"dec_deg":43.7048379,"epoch_ra_deg":288.462272,"epoch_dec_deg":43.74976,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-427","semi_major_axis_km":13613406.233699998,"periapsis_km":null,"mass_kg":5.5045471237433144e+26,"mass_msun":0.000276832,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-427-b","radius_km":87953.999,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-427","host_v_mag":14.301,"uncertainties":{"mass_kg":[1.7080400101883347e+26,1.7080400101883347e+26],"radius_km":[14988.535000000002,14988.535000000002],"distance_ly":[52.1197891591356,53.78318668549098],"host_mass_solar":[0.06,0.06],"inclination_deg":[0.45,0.45],"host_radius_solar":[0.2,0.2],"host_temperature_k":[70,70],"semi_major_axis_km":[1495978.707,1495978.707],"orbital_period_days":[0.0000011,0.0000011]},"host_mass_solar":0.96,"inclination_deg":89.5,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.35,"planets_in_system":1,"discovery_facility":"Kepler","host_spectral_type":"G2 V","host_temperature_k":5800,"orbital_period_days":10.290994,"transit_midpoint_bjd":2454970.02207,"eccentricity_upper_limit":0.57,"equilibrium_temperature_k":1100},"designations":[{"catalog":"Exoplanet","designation":"Kepler-427 b"},{"catalog":"Host star","designation":"Kepler-427"}],"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."}