{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T13:32:30.864Z","years_from_j2000":26.683,"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":"hd-213885-b","name":"HD 213885 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":156.8430573855607,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":338.9837166,"dec_deg":-59.864829,"epoch_ra_deg":339.422905,"epoch_dec_deg":-59.725811,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 213885","semi_major_axis_km":3009909.158484,"periapsis_km":null,"mass_kg":5.2734242272597875e+25,"mass_msun":0.0000265208,"constellation":"Tucana","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/hd-213885-b","radius_km":11129.784500000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 213885","host_v_mag":7.95,"eccentricity":0,"uncertainties":{"mass_kg":[3.8819091140643965e+24,3.9416307927423103e+24],"radius_km":[331.6612,325.2831],"distance_ly":[0.3219163448064257,0.3232209703172927],"host_mass_solar":[0.018,0.02],"inclination_deg":[0.5,0.62],"host_radius_solar":[0.0075,0.008],"host_temperature_k":[50,50],"semi_major_axis_km":[17951.744484,22439.680604999998],"orbital_period_days":[0.00002,0.000021]},"host_mass_solar":1.068,"inclination_deg":80.09,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.1011,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G","host_temperature_k":5978,"orbital_period_days":1.008035,"transit_midpoint_bjd":2458379.97043,"equilibrium_temperature_k":2128},"designations":[{"catalog":"Exoplanet","designation":"HD 213885 b"},{"catalog":"Host star","designation":"HD 213885"}],"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."}