{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T03:22:20.687Z","years_from_j2000":26.679,"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":"k2-269-b","name":"K2-269 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1176.6417482509235,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":130.1551381,"dec_deg":13.0146799,"epoch_ra_deg":130.525914,"epoch_dec_deg":12.919618,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-269","semi_major_axis_km":7943646.934169999,"periapsis_km":null,"mass_kg":1.845399871147536e+25,"mass_msun":0.00000928078,"constellation":"Cancer","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/k2-269-b","radius_km":10013.617,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-269","host_v_mag":11.784,"uncertainties":{"radius_km":[765.3720000000001,765.3720000000001],"distance_ly":[47.46879921289484,51.5490154981313],"host_mass_solar":[0.04,0.04],"inclination_deg":[5.1831,2.37111],"host_radius_solar":[0.06,0.06],"host_temperature_k":[88,88],"semi_major_axis_km":[89758.72241999999,89758.72241999999],"orbital_period_days":[0.000619,0.000817]},"host_mass_solar":1.16,"inclination_deg":86.72002,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.45,"planets_in_system":1,"discovery_facility":"K2","host_temperature_k":6209,"orbital_period_days":4.144965,"transit_midpoint_bjd":2457141.59855,"equilibrium_temperature_k":1429},"designations":[{"catalog":"Exoplanet","designation":"K2-269 b"},{"catalog":"Host star","designation":"K2-269"}],"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."}