{"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":"2026-09-07T12:28:50.110Z","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-329-b","name":"TOI-329 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":927.5495994610922,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":351.3210955,"dec_deg":-15.6346313,"epoch_ra_deg":351.672145,"epoch_dec_deg":-15.487036,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-329","semi_major_axis_km":9544344.150659999,"periapsis_km":null,"mass_kg":2.412755818587717e+26,"mass_msun":0.000121341,"constellation":"Aquarius","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-329-b","radius_km":31511.501753639004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-329","host_v_mag":11.262,"eccentricity":0.39,"uncertainties":{"mass_kg":[2.2097021110828105e+25,2.269423789760724e+25],"radius_km":[1633.700183134,1862.5721148769999],"distance_ly":[13.453950580815667,13.851861361630093],"eccentricity":[0.033,0.033],"host_mass_solar":[0.0304,0.0312],"host_radius_solar":[0.034,0.0348],"host_temperature_k":[74,79],"semi_major_axis_km":[194477.23190999997,179517.44483999998],"orbital_period_days":[0.00013,0.00013],"argument_of_periastron_deg":[170,170]},"host_mass_solar":1.0678,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.5326,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5614,"orbital_period_days":5.70439,"transit_midpoint_bjd":2459090.7955,"equilibrium_temperature_k":1213.02,"argument_of_periastron_deg":170},"designations":[{"catalog":"Exoplanet","designation":"TOI-329 b"},{"catalog":"Host star","designation":"TOI-329"}],"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."}