{"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":"2026-09-03T13:00:34.645Z","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-169-d","name":"Kepler-169 d","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1325.9202607680998,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":285.9999204,"dec_deg":40.9193822,"epoch_ra_deg":286.21884,"epoch_dec_deg":40.958656,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-169","semi_major_axis_km":11219840.302499998,"periapsis_km":null,"mass_kg":1.2541552522361896e+25,"mass_msun":0.00000630733,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-169-d","radius_km":7972.625,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-169","host_v_mag":14.424,"eccentricity":0,"uncertainties":{"radius_km":[574.029,574.029],"distance_ly":[9.719460055958955,9.862968862154322],"host_mass_solar":[0.013,0.007],"host_radius_solar":[0.046,0.046],"host_temperature_k":[100,100],"orbital_period_days":[0.000041,0.000041]},"host_mass_solar":0.825,"inclination_deg":86.78,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.763,"planets_in_system":5,"discovery_facility":"Kepler","host_temperature_k":4997,"orbital_period_days":8.348125,"transit_midpoint_bjd":2454969.84117,"equilibrium_temperature_k":702},"designations":[{"catalog":"Exoplanet","designation":"Kepler-169 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":"2026-09-02T19:50:56.720Z","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."}