{"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":"2026-09-05T07:10:29.209Z","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":"tic-139270665-c","name":"TIC 139270665 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":619.2894221896665,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":124.0338967,"dec_deg":33.2914532,"epoch_ra_deg":124.459922,"epoch_dec_deg":33.209195,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TIC 139270665","semi_major_axis_km":299195741.4,"periapsis_km":null,"mass_kg":9.281829292810365e+27,"mass_msun":0.00466797,"constellation":"Lynx","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/tic-139270665-c","radius_km":82277.49,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TIC 139270665","host_v_mag":10.385,"eccentricity":0.566,"uncertainties":{"mass_kg":[7.023061019099866e+26,1.2527622358394356e+27],"distance_ly":[5.182624841919052,5.267425500125406],"eccentricity":[0.069,0.12],"host_mass_solar":[0.062,0.052],"host_radius_solar":[0.031,0.035],"host_temperature_k":[82,84],"semi_major_axis_km":[46375339.916999996,139126019.751],"orbital_period_days":[220,780],"argument_of_periastron_deg":[9.5,9.6]},"host_mass_solar":1.035,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.016,"planets_in_system":2,"discovery_facility":"Lick Observatory","host_spectral_type":"G2","host_temperature_k":5844,"orbital_period_days":1010,"periastron_epoch_bjd":2459837.3,"transit_midpoint_bjd":2460042,"equilibrium_temperature_k":200,"argument_of_periastron_deg":-44.3},"designations":[{"catalog":"Exoplanet","designation":"TIC 139270665 c"},{"catalog":"Host star","designation":"TIC 139270665"}],"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."}