{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T14:38:49.276Z","years_from_j2000":26.683,"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-198190129-b","name":"TIC 198190129 b","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":424.1174457639673,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":246.3322839,"dec_deg":60.3771414,"epoch_ra_deg":246.437431,"epoch_dec_deg":60.315111,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TIC 198190129","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":5.297312898730953e+25,"mass_msun":0.000026641,"constellation":"Draco","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/tic-198190129-b","radius_km":18642.226332169,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TIC 198190129","host_v_mag":13.704,"uncertainties":{"radius_km":[1286.232456809,1355.422978543],"distance_ly":[0.714282467199668,0.714282467199668],"host_mass_solar":[0.105445,0.056516],"inclination_deg":[1.3942,0.77337],"orbital_period_days":[0.00002452378,0.00002317701]},"host_mass_solar":0.638,"inclination_deg":88.9679,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.640675,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":4377.53,"orbital_period_days":7.94804910667,"transit_midpoint_bjd":2459789.40196039},"designations":[{"catalog":"Exoplanet","designation":"TIC 198190129 b"},{"catalog":"Host star","designation":"TIC 198190129"}],"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."}