{"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":"2026-09-01T13:58:12.083Z","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-92-d","name":"Kepler-92 d","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":1559.0013929758163,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.0860607,"dec_deg":41.5630224,"epoch_ra_deg":289.304109,"epoch_dec_deg":41.609977,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-92","semi_major_axis_km":42907661.274174,"periapsis_km":null,"mass_kg":7.086980857666332e+25,"mass_msun":0.0000356414,"constellation":"Lyra","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/kepler-92-d","radius_km":13183.532700000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-92","host_v_mag":11.671,"eccentricity":0.07,"uncertainties":{"mass_kg":[6.7375001408916355e+25,6.7375001408916355e+25],"radius_km":[357.1736,357.1736],"distance_ly":[17.32542678431341,17.710291310019166],"eccentricity":[0.04,0.34],"host_mass_solar":[0.13016,0.138335],"host_radius_solar":[0.05488,0.126065],"host_temperature_k":[139.24,120.45],"semi_major_axis_km":[652246.716252,652246.716252],"orbital_period_days":[0.0024,0.0024]},"host_mass_solar":1.07,"inclination_deg":89.53,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.81719,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":5904.34,"orbital_period_days":49.3568,"transit_midpoint_bjd":2454967.29682,"equilibrium_temperature_k":637},"designations":[{"catalog":"Exoplanet","designation":"Kepler-92 d"},{"catalog":"Host star","designation":"Kepler-92"}],"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."}