{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T16:33:54.925Z","years_from_j2000":26.673,"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-34-b","name":"Kepler-34 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":5873.489281198658,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":296.4358022,"dec_deg":44.6415369,"epoch_ra_deg":296.646621,"epoch_dec_deg":44.706284,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-34","semi_major_axis_km":163001839.91471997,"periapsis_km":null,"mass_kg":4.175739773159732e+26,"mass_msun":0.000210004,"constellation":"Cygnus","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-34-b","radius_km":54622.04840000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-34","host_v_mag":15.087,"eccentricity":0.182,"uncertainties":{"mass_kg":[1.8979549483841004e+25,2.087869886579866e+25],"radius_km":[1001.3617,861.0435000000001],"distance_ly":[260.598945795678,285.4846774154655],"eccentricity":[0.02,0.016],"host_mass_solar":[0.003,0.0033],"inclination_deg":[0.018,0.026],"host_radius_solar":[0.0031,0.0027],"host_temperature_k":[130,130],"semi_major_axis_km":[134638.08362999998,134638.08362999998],"orbital_period_days":[0.081,0.063]},"host_mass_solar":1.0479,"inclination_deg":90.355,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.1618,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5913,"orbital_period_days":288.822,"transit_midpoint_bjd":2454969.2,"equilibrium_temperature_k":294.42},"designations":[{"catalog":"Exoplanet","designation":"Kepler-34 b"},{"catalog":"Host star","designation":"Kepler-34"}],"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."}