{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T22:27:31.900Z","years_from_j2000":26.682,"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":"epic-211822797-b","name":"EPIC 211822797 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":607.2933906172448,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":130.4102091,"dec_deg":17.6399744,"epoch_ra_deg":130.790918,"epoch_dec_deg":17.544381,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"EPIC 211822797","semi_major_axis_km":17876945.548649997,"periapsis_km":null,"mass_kg":2.5978930224892496e+25,"mass_msun":0.0000130652,"constellation":"Cancer","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/epic-211822797-b","radius_km":12245.952000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"EPIC 211822797","host_v_mag":15.133,"eccentricity":0.06,"uncertainties":{"radius_km":[446.46700000000004,765.3720000000001],"distance_ly":[4.450403773944964,4.450403773944964],"eccentricity":[0.048705,0.13597],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.22,0.19],"host_radius_solar":[0.01,0.01],"host_temperature_k":[39,37],"semi_major_axis_km":[3754906.5545699997,1495978.707],"orbital_period_days":[0.0000642,0.0000662],"argument_of_periastron_deg":[67,156]},"host_mass_solar":0.62,"inclination_deg":89.73,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.58,"planets_in_system":1,"discovery_facility":"K2","host_spectral_type":"M0","host_temperature_k":4057,"orbital_period_days":21.1701963,"transit_midpoint_bjd":2457144.4052567,"equilibrium_temperature_k":431,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"EPIC 211822797 b"},{"catalog":"Host star","designation":"EPIC 211822797"}],"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."}