{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T15:50:41.767Z","years_from_j2000":26.686,"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":"toi-199-c","name":"TOI-199 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":333.5601274909135,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":80.1058735,"dec_deg":-59.8954326,"epoch_ra_deg":80.196777,"epoch_dec_deg":-59.867563,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-199","semi_major_axis_km":120725481.6549,"periapsis_km":null,"mass_kg":5.314748879318818e+26,"mass_msun":0.000267286,"constellation":"Dorado","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-199-c","radius_km":72710.34000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-199","host_v_mag":10.701,"eccentricity":0.096,"uncertainties":{"mass_kg":[1.8981245997567207e+25,3.7962491995134414e+25],"distance_ly":[0.6196971176618125,0.6229586814389799],"eccentricity":[0.009,0.008],"host_mass_solar":[0.005,0.003],"host_radius_solar":[0.003,0.003],"host_temperature_k":[10,12],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.22,0.26],"argument_of_periastron_deg":[7,4]},"host_mass_solar":0.936,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":0.82,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"G9 V","host_temperature_k":5255,"orbital_period_days":273.69,"transit_midpoint_bjd":2458460.741,"equilibrium_temperature_k":255.43,"argument_of_periastron_deg":8},"designations":[{"catalog":"Exoplanet","designation":"TOI-199 c"}],"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."}