{"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":"2026-09-06T01:41:10.008Z","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":"k2-107-b","name":"K2-107 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2234.823500115126,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":284.985355,"dec_deg":-22.2934206,"epoch_ra_deg":285.388902,"epoch_dec_deg":-22.256453,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-107","semi_major_axis_km":7105898.85825,"periapsis_km":null,"mass_kg":1.5944326552729126e+27,"mass_msun":0.000801863,"constellation":"Sagittarius","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/k2-107-b","radius_km":101922.03800000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-107","host_v_mag":13.012,"eccentricity":0,"uncertainties":{"mass_kg":[1.5185072907361073e+26,1.5185072907361073e+26],"radius_km":[3507.9550000000004,3507.9550000000004],"distance_ly":[63.1569209810702,66.86858055948673],"host_mass_solar":[0.05,0.05],"inclination_deg":[0.26324,0.33571],"host_radius_solar":[0.06,0.06],"host_temperature_k":[96,96],"semi_major_axis_km":[89758.72241999999,89758.72241999999],"orbital_period_days":[0.000024,0.000024]},"host_mass_solar":1.3,"inclination_deg":82.36105,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.81,"planets_in_system":1,"discovery_facility":"K2","host_spectral_type":"F9 IV","host_temperature_k":6061,"orbital_period_days":3.313959,"transit_midpoint_bjd":2457311.15178,"equilibrium_temperature_k":1649},"designations":[{"catalog":"Exoplanet","designation":"K2-107 b"},{"catalog":"Host star","designation":"K2-107"}],"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."}