{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T19:42:15.291Z","years_from_j2000":26.681,"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-5489-c","name":"TOI-5489 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":147.06619380712362,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":128.691294,"dec_deg":11.4895882,"epoch_ra_deg":129.059379,"epoch_dec_deg":11.397503,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5489","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":1.3019325951785207e+25,"mass_msun":0.00000654761,"constellation":"Cancer","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-5489-c","radius_km":8163.968000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5489","host_v_mag":13.824,"uncertainties":{"radius_km":[446.46700000000004,446.46700000000004],"distance_ly":[0.41144627048967186,0.41144627048967186],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.4,0.4],"host_radius_solar":[0.01,0.01],"host_temperature_k":[157,157],"orbital_period_days":[0.00001,0.00001]},"host_mass_solar":0.41,"inclination_deg":88.8,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.42,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":3547,"orbital_period_days":4.92126,"transit_midpoint_bjd":2458496.32542,"equilibrium_temperature_k":536},"designations":[{"catalog":"Exoplanet","designation":"TOI-5489 c"}],"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."}