{"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":"2026-09-08T18:07:29.193Z","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":"toi-269-b","name":"TOI-269 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":185.98252048353,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":75.8462827,"dec_deg":-54.1777213,"epoch_ra_deg":75.990481,"epoch_dec_deg":-54.139076,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-269","semi_major_axis_km":5161126.53915,"periapsis_km":null,"mass_kg":5.255507723656414e+25,"mass_msun":0.0000264307,"constellation":"Pictor","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-269-b","radius_km":17667.337,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-269","host_v_mag":14.37,"eccentricity":0.425,"uncertainties":{"mass_kg":[8.361035014907931e+24,8.361035014907931e+24],"radius_km":[765.3720000000001,765.3720000000001],"distance_ly":[0.24657422155385803,0.24690037793157477],"eccentricity":[0.086,0.082],"host_mass_solar":[0.0095,0.0095],"inclination_deg":[0.9,0.78],"host_radius_solar":[0.012,0.012],"host_temperature_k":[70,70],"semi_major_axis_km":[224396.80604999998,224396.80604999998],"orbital_period_days":[0.0000037,0.0000037],"argument_of_periastron_deg":[15,15]},"host_mass_solar":0.3917,"inclination_deg":88.14,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.398,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2 V","host_temperature_k":3514,"orbital_period_days":3.6977104,"transit_midpoint_bjd":2458381.84668,"equilibrium_temperature_k":531,"argument_of_periastron_deg":74},"designations":[{"catalog":"Exoplanet","designation":"TOI-269 b"},{"catalog":"Host star","designation":"TOI-269"}],"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."}