{"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":"2026-09-07T10:31:00.316Z","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-700-d","name":"TOI-700 d","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":101.52106491000214,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":97.0957165,"dec_deg":-65.5786149,"epoch_ra_deg":97.112331,"epoch_dec_deg":-65.594831,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-700","semi_major_axis_km":24429332.285309996,"periapsis_km":null,"mass_kg":7.465209834739224e+24,"mass_msun":0.00000375436,"constellation":"Dorado","discovered":"2020","featured":true,"url":"https://spacecatalog.org/object/toi-700-d","radius_km":6843.7013,"radius_kind":null,"data_quality":null,"description":"An Earth-sized world in the habitable zone of a quiet red dwarf, found by TESS, and one of the few such planets whose star does not flare violently.","properties":{"host_star":"TOI-700","host_v_mag":13.151,"eccentricity":0.042,"uncertainties":{"radius_km":[344.41740000000004,376.3079],"distance_ly":[0.06718821380964915,0.06718821380964915],"eccentricity":[0.03,0.045],"host_mass_solar":[0.02,0.021],"inclination_deg":[0.1,0.12],"host_radius_solar":[0.015,0.017],"host_temperature_k":[65,65],"semi_major_axis_km":[403914.25088999997,403914.25088999997],"orbital_period_days":[0.00035,0.00039],"argument_of_periastron_deg":[140,120]},"host_mass_solar":0.415,"inclination_deg":89.8,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.421,"planets_in_system":4,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2.5 V","host_temperature_k":3459,"orbital_period_days":37.42396,"transit_midpoint_bjd":2458816.9952,"equilibrium_temperature_k":268.8,"argument_of_periastron_deg":10},"designations":[{"catalog":"Exoplanet","designation":"TOI-700 d"}],"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."}