{"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":"2026-09-03T18:51:55.616Z","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":"k2-265-b","name":"K2-265 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":452.28431054358526,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":342.0316493,"dec_deg":-14.4947789,"epoch_ra_deg":342.388022,"epoch_dec_deg":-14.353133,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-265","semi_major_axis_km":5024992.476813,"periapsis_km":null,"mass_kg":4.384667824422756e+25,"mass_msun":0.0000220511,"constellation":"Aquarius","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/k2-265-b","radius_km":10895.380778346,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-265","host_v_mag":11.187,"eccentricity":0.16,"uncertainties":{"mass_kg":[8.351748234151837e+24,8.541560689946991e+24],"radius_km":[514.742391946,714.920017161],"distance_ly":[3.163716863852411,3.2126403205099225],"eccentricity":[0.11,0.16],"host_mass_solar":[0.042,0.051],"inclination_deg":[1,1.8],"host_radius_solar":[0.032,0.034],"host_temperature_k":[100,100],"semi_major_axis_km":[79286.87147099999,92750.679834],"orbital_period_days":[0.000059,0.000058],"argument_of_periastron_deg":[27,52]},"host_mass_solar":0.901,"inclination_deg":87.01,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.92,"planets_in_system":1,"discovery_facility":"K2","host_spectral_type":"G8 V","host_temperature_k":5420,"orbital_period_days":2.36902,"transit_midpoint_bjd":2457017.18078,"equilibrium_temperature_k":1366,"argument_of_periastron_deg":-57},"designations":[{"catalog":"Exoplanet","designation":"K2-265 b"},{"catalog":"Host star","designation":"K2-265"}],"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."}