{"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":"2026-09-07T12:54:39.029Z","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":"toi-1842-b","name":"TOI-1842 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":728.8453494647207,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":201.9626552,"dec_deg":9.0306437,"epoch_ra_deg":202.298363,"epoch_dec_deg":8.891216,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1842","semi_major_axis_km":14959787.07,"periapsis_km":null,"mass_kg":5.339118073805493e+26,"mass_msun":0.000268512,"constellation":"Virgo","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1842-b","radius_km":78759.98251963001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1842","host_v_mag":9.815,"eccentricity":0.276,"uncertainties":{"mass_kg":[4.658290936877275e+25,4.658290936877275e+25],"radius_km":[1877.3082684600001,1780.627051449],"distance_ly":[7.227625330203034,7.371134136398401],"eccentricity":[0.064,0.064],"host_mass_solar":[0.0362,0.0292],"inclination_deg":[1.5,0.9],"host_radius_solar":[0.0401,0.037],"host_temperature_k":[89,93],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.0000099,0.0000099],"argument_of_periastron_deg":[9.7,9.7]},"host_mass_solar":1.4643,"inclination_deg":88.4,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.032,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6039,"orbital_period_days":9.5739181,"transit_midpoint_bjd":2458933.33614,"equilibrium_temperature_k":1199.55,"argument_of_periastron_deg":67.6},"designations":[{"catalog":"Exoplanet","designation":"TOI-1842 b"},{"catalog":"Host star","designation":"TOI-1842"}],"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."}