{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T07:22:36.625Z","years_from_j2000":26.677,"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":"k2-79-b","name":"K2-79 b","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":834.9962041564121,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":55.2559307,"dec_deg":13.5191871,"epoch_ra_deg":55.629466,"epoch_dec_deg":13.605889,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-79","semi_major_axis_km":14765309.838089999,"periapsis_km":null,"mass_kg":3.523579041996914e+25,"mass_msun":0.0000177206,"constellation":"Taurus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/k2-79-b","radius_km":26469.115000000005,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-79","host_v_mag":12.152,"eccentricity":0.032,"uncertainties":{"mass_kg":[1.5527636456257586e+25,1.5527636456257586e+25],"radius_km":[1148.058,1211.8390000000002],"distance_ly":[7.524427633925271,7.661413312566303],"eccentricity":[0.025,0.057],"host_mass_solar":[0.05,0.05],"inclination_deg":[0.48,0.58],"host_radius_solar":[0.051,0.051],"host_temperature_k":[118,118],"semi_major_axis_km":[239356.59312,224396.80604999998],"orbital_period_days":[0.000016,0.000013]},"host_mass_solar":1.06,"inclination_deg":88.42,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.269,"planets_in_system":1,"discovery_facility":"K2","host_spectral_type":"G1","host_temperature_k":5897,"orbital_period_days":10.995039,"transit_midpoint_bjd":2459917.9583,"equilibrium_temperature_k":1033},"designations":[{"catalog":"Exoplanet","designation":"K2-79 b"},{"catalog":"Host star","designation":"K2-79"}],"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."}