{"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":"2026-09-03T22:30:49.394Z","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-10-b","name":"Kepler-10 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":605.039650047222,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":285.679298,"dec_deg":50.2414842,"epoch_ra_deg":285.849561,"epoch_dec_deg":50.279894,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-10","semi_major_axis_km":2520724.121295,"periapsis_km":null,"mass_kg":1.934982389164407e+25,"mass_msun":0.00000973131,"constellation":"Draco","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-10-b","radius_km":9375.807,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-10","host_v_mag":11.043,"eccentricity":0,"uncertainties":{"mass_kg":[1.9110937176932413e+24,1.9110937176932413e+24],"radius_km":[127.56200000000001,191.34300000000002],"distance_ly":[2.6255588406197847,2.6451282232827893],"host_mass_solar":[0.021,0.021],"inclination_deg":[3.9,3.2],"host_radius_solar":[0.009,0.009],"host_temperature_k":[28,28],"semi_major_axis_km":[19447.723190999997,19447.723190999997],"orbital_period_days":[2e-7,2e-7]},"host_mass_solar":0.91,"inclination_deg":84.8,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.065,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":5708,"orbital_period_days":0.8374907,"transit_midpoint_bjd":2455034.08687,"equilibrium_temperature_k":2188},"designations":[{"catalog":"Exoplanet","designation":"Kepler-10 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."}