{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T02:33:38.028Z","years_from_j2000":26.682,"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-1238-c","name":"TOI-1238 c","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":230.63985172050653,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":201.3823387,"dec_deg":68.8360678,"epoch_ra_deg":201.591078,"epoch_dec_deg":68.69605,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1238","semi_major_axis_km":5535121.215899999,"periapsis_km":null,"mass_kg":4.9688436660024275e+25,"mass_msun":0.000024989,"constellation":"Draco","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-1238-c","radius_km":13457.791,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1238","host_v_mag":12.796,"uncertainties":{"mass_kg":[1.1227675591447793e+25,1.134711894880362e+25],"radius_km":[892.9340000000001,892.9340000000001],"distance_ly":[0.3931815133375342,0.3931815133375342],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.47,0.57],"host_radius_solar":[0.02,0.02],"host_temperature_k":[54,54],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.000036,0.000034]},"host_mass_solar":0.59,"inclination_deg":88.38,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.58,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K7/M0","host_temperature_k":4089,"orbital_period_days":3.294736,"transit_midpoint_bjd":2458707.352,"eccentricity_upper_limit":0.15,"equilibrium_temperature_k":695},"designations":[{"catalog":"Exoplanet","designation":"TOI-1238 c"},{"catalog":"Host star","designation":"TOI-1238"}],"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."}