{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T23:24:01.002Z","years_from_j2000":26.668,"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":"k2-360-c","name":"K2-360 c","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":757.0089526805615,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":183.7203635,"dec_deg":1.9681688,"epoch_ra_deg":184.064099,"epoch_dec_deg":1.81889,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"EPIC 201595106","semi_major_axis_km":13209491.98281,"periapsis_km":null,"mass_kg":9.09561166264627e+25,"mass_msun":0.0000457431,"constellation":"Virgo","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/k2-360-c","radius_km":25639.962,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"EPIC 201595106","host_v_mag":11.746,"eccentricity":0.11,"uncertainties":{"mass_kg":[1.086934551938031e+25,1.086934551938031e+25],"distance_ly":[8.63009775438503,8.825791581015077],"eccentricity":[0.08,0.1],"host_mass_solar":[0.048,0.048],"host_radius_solar":[0.025,0.025],"host_temperature_k":[39,60],"semi_major_axis_km":[239356.59312,239356.59312],"orbital_period_days":[0.02961,0.02961],"argument_of_periastron_deg":[225,87]},"host_mass_solar":0.958,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.98,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_temperature_k":5679,"orbital_period_days":9.79692,"equilibrium_temperature_k":912,"argument_of_periastron_deg":71},"designations":[{"catalog":"Exoplanet","designation":"K2-360 c"},{"catalog":"Host star","designation":"EPIC 201595106"}],"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":"2026-09-01T22:58:55.274Z","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."}