{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T18:56:13.865Z","years_from_j2000":26.67,"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":"k2-34-b","name":"K2-34 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1137.1311646543172,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":127.5787231,"dec_deg":22.2359194,"epoch_ra_deg":127.971514,"epoch_dec_deg":22.146175,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-34","semi_major_axis_km":6612225.88494,"periapsis_km":null,"mass_kg":3.2230317245873874e+27,"mass_msun":0.00162091,"constellation":"Cancer","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/k2-34-b","radius_km":87698.875,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-34","host_v_mag":11.447,"eccentricity":0,"uncertainties":{"mass_kg":[9.490670567100671e+25,1.157861809186282e+26],"radius_km":[3763.079,3699.298],"distance_ly":[19.915108423384353,20.62286776302969],"host_mass_solar":[0.04,0.04],"inclination_deg":[0.19,0.19],"host_radius_solar":[0.05,0.06],"host_temperature_k":[76,46],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[2e-7,2e-7]},"host_mass_solar":1.16,"inclination_deg":82.23,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.42,"planets_in_system":1,"discovery_facility":"K2","host_spectral_type":"F","host_temperature_k":6168,"orbital_period_days":2.9956348,"transit_midpoint_bjd":2457141.3514834,"equilibrium_temperature_k":1687},"designations":[{"catalog":"Exoplanet","designation":"K2-34 b"},{"catalog":"Host star","designation":"K2-34"}],"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":"2026-09-02T18:38:07.546Z","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."}