{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T18:25:59.434Z","years_from_j2000":26.684,"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-1749-b","name":"TOI-1749 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":324.7085695560588,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":282.7372281,"dec_deg":64.419466,"epoch_ra_deg":282.775454,"epoch_dec_deg":64.450248,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1749","semi_major_axis_km":4353298.03737,"periapsis_km":null,"mass_kg":3.404135684641086e+26,"mass_msun":0.000171199,"constellation":"Draco","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1749-b","radius_km":8865.559,"radius_kind":null,"data_quality":"The published mass and radius imply a density no material has. One of the two is likely an upper limit rather than a measurement.","description":null,"properties":{"host_star":"TOI-1749","host_v_mag":13.86,"uncertainties":{"radius_km":[1211.8390000000002,1339.401],"distance_ly":[0.38225527468402326,0.38225527468402326],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.6,0.9],"host_radius_solar":[0.03,0.03],"host_temperature_k":[55,55],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[0.00066,0.00031],"argument_of_periastron_deg":[60,100]},"host_mass_solar":0.58,"inclination_deg":86.4,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.55,"planets_in_system":3,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M0 V","host_temperature_k":3985,"orbital_period_days":2.38839,"transit_midpoint_bjd":2458684.354953,"eccentricity_upper_limit":0.14,"equilibrium_temperature_k":831,"argument_of_periastron_deg":-50},"designations":[{"catalog":"Exoplanet","designation":"TOI-1749 b"}],"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."}