{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T14:59:13.696Z","years_from_j2000":26.67,"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-635-b","name":"Kepler-635 b","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":3721.705194850216,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.7732613,"dec_deg":40.8007019,"epoch_ra_deg":289.995161,"epoch_dec_deg":40.849375,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-635","semi_major_axis_km":27424281.656724,"periapsis_km":null,"mass_kg":4.455237229372369e+25,"mass_msun":0.000022406,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-635-b","radius_km":16838.184,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-635","host_v_mag":13.36,"eccentricity":0,"uncertainties":{"radius_km":[1722.0870000000002,2296.116],"distance_ly":[74.82027304822094,77.95137427430167],"host_mass_solar":[0.053,0.063],"host_radius_solar":[0.155,0.198],"host_temperature_k":[82.75,70.4],"semi_major_axis_km":[160069.72164899998,160069.72164899998],"orbital_period_days":[0.00007672,0.00007672]},"host_mass_solar":1.33,"inclination_deg":89.46,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.51,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":6174,"orbital_period_days":23.44971004,"transit_midpoint_bjd":2455015.92292,"equilibrium_temperature_k":802},"designations":[{"catalog":"Exoplanet","designation":"Kepler-635 b"},{"catalog":"Host star","designation":"Kepler-635"}],"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":"2026-09-01T22:58:55.274Z","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."}