{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T02:41:40.950Z","years_from_j2000":26.671,"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-25-c","name":"Kepler-25 c","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":793.3721272322011,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":286.6383905,"dec_deg":39.4879038,"epoch_ra_deg":286.863847,"epoch_dec_deg":39.528785,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-25","semi_major_axis_km":16710082.157189997,"periapsis_km":null,"mass_kg":9.077695159042896e+25,"mass_msun":0.000045653,"constellation":"Lyra","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-25-c","radius_km":33274.5477,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-25","host_v_mag":10.769,"eccentricity":0.0061,"uncertainties":{"mass_kg":[9.555468588466207e+24,7.763818228128793e+24],"radius_km":[414.5765,446.46700000000004],"distance_ly":[4.556404596702905,4.611851180914751],"eccentricity":[0.0041,0.0049],"host_mass_solar":[0.029,0.027],"inclination_deg":[0.039,0.042],"host_radius_solar":[0.015,0.016],"host_temperature_k":[27,27],"semi_major_axis_km":[166053.636477,166053.636477],"orbital_period_days":[0.0001,0.00011]},"host_mass_solar":1.165,"inclination_deg":92.764,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.316,"planets_in_system":3,"discovery_facility":"Kepler","host_spectral_type":"F8","host_temperature_k":6354,"orbital_period_days":12.7207,"transit_midpoint_bjd":2455711.15013,"equilibrium_temperature_k":934},"designations":[{"catalog":"Exoplanet","designation":"Kepler-25 c"},{"catalog":"Host star","designation":"Kepler-25"}],"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."}