{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T16:13:33.055Z","years_from_j2000":26.667,"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-167-d","name":"Kepler-167 d","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1115.1547479237631,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":292.6585253,"dec_deg":38.3455558,"epoch_ra_deg":292.892681,"epoch_dec_deg":38.401283,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-167","semi_major_axis_km":21003541.046279997,"periapsis_km":null,"mass_kg":1.2302665807650241e+25,"mass_msun":0.00000618719,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-167-d","radius_km":7896.0878,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-167","host_v_mag":14.284,"eccentricity":0,"uncertainties":{"radius_km":[408.19840000000005,408.19840000000005],"distance_ly":[6.435065332351348,6.435065332351348],"host_mass_solar":[0.031,0.034],"inclination_deg":[0.5,0.5],"host_radius_solar":[0.02,0.02],"host_temperature_k":[75,69],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.00018,0.00013]},"host_mass_solar":0.777,"inclination_deg":89.26,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.749,"planets_in_system":4,"discovery_facility":"Kepler","host_spectral_type":"K4","host_temperature_k":4884,"orbital_period_days":21.80379,"transit_midpoint_bjd":2455669.7888,"equilibrium_temperature_k":538},"designations":[{"catalog":"Exoplanet","designation":"Kepler-167 d"}],"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":"2026-08-30T09:56:50.739Z","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."}