{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-09T00:57:43.562Z","years_from_j2000":26.687,"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-423703298-b","name":"TIC 423703298 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":444.19563237621,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":22.9360486,"dec_deg":-17.0135676,"epoch_ra_deg":23.263128,"epoch_dec_deg":-16.875048,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TIC 423703298","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":4.843428140778808e+25,"mass_msun":0.0000243583,"constellation":"Cetus","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/tic-423703298-b","radius_km":17682.033992049,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TIC 423703298","host_v_mag":12.923,"uncertainties":{"radius_km":[1906.6521206920002,2198.050990413],"distance_ly":[2.553804437522101,2.5798969477394404],"host_mass_solar":[0.087436,0.0724],"inclination_deg":[2.26754,1.15461],"orbital_period_days":[0.00004154448,0.00003918146]},"host_mass_solar":0.691,"inclination_deg":88.37961,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.729825,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":4540.37,"orbital_period_days":4.03712711976,"transit_midpoint_bjd":2459141.13558959},"designations":[{"catalog":"Exoplanet","designation":"TIC 423703298 b"},{"catalog":"Host star","designation":"TIC 423703298"}],"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."}