{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T03:32:57.896Z","years_from_j2000":26.679,"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-725-c","name":"Kepler-725 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":2473.7950165044067,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":283.9774949,"dec_deg":44.8115613,"epoch_ra_deg":284.176935,"epoch_dec_deg":44.845715,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-725","semi_major_axis_km":100888804.00007999,"periapsis_km":null,"mass_kg":5.793002831757638e+25,"mass_msun":0.0000291338,"constellation":"Lyra","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/kepler-725-c","radius_km":19644.548000000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-725","host_v_mag":15.145,"eccentricity":0.436,"uncertainties":{"mass_kg":[1.3735986095920172e+25,1.970815396371155e+25],"distance_ly":[43.69190835893495,45.26072053575248],"eccentricity":[0.017,0.017],"host_mass_solar":[0.01,0.01],"host_radius_solar":[0.03,0.05],"host_temperature_k":[64,64],"semi_major_axis_km":[344075.10260999994,344075.10260999994],"orbital_period_days":[0.248,0.348],"argument_of_periastron_deg":[11,11.4]},"host_mass_solar":0.95,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":0.88,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5395,"orbital_period_days":207.541,"equilibrium_temperature_k":268,"argument_of_periastron_deg":29.7},"designations":[{"catalog":"Exoplanet","designation":"Kepler-725 c"}],"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."}