{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T07:42:09.990Z","years_from_j2000":26.672,"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-407-b","name":"Kepler-407 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1103.6088121525904,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":286.0363025,"dec_deg":49.6145027,"epoch_ra_deg":286.210652,"epoch_dec_deg":49.653809,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-407","semi_major_axis_km":2290343.400417,"periapsis_km":null,"mass_kg":1.152628398483736e+25,"mass_msun":0.00000579673,"constellation":"Draco","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-407-b","radius_km":7589.939,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-407","host_v_mag":12.603,"eccentricity":0,"uncertainties":{"mass_kg":[2.9860839338956896e+24,2.9860839338956896e+24],"radius_km":[318.90500000000003,318.90500000000003],"distance_ly":[8.13760162403275,8.255017920010776],"host_mass_solar":[0.05,0.05],"host_radius_solar":[0.05,0.05],"host_temperature_k":[100,100],"semi_major_axis_km":[22439.680604999998,22439.680604999998],"orbital_period_days":[6e-7,6e-7]},"host_mass_solar":0.99,"inclination_deg":87.19,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.04,"planets_in_system":2,"discovery_facility":"Kepler","host_spectral_type":"G","host_temperature_k":5487,"orbital_period_days":0.6693124,"transit_midpoint_bjd":2454967.12007,"equilibrium_temperature_k":1983},"designations":[{"catalog":"Exoplanet","designation":"Kepler-407 b"}],"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."}