{"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":"2026-09-08T19:39:15.754Z","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-1756-b","name":"TOI-1756 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":282.82943834447354,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":306.3287741,"dec_deg":77.6364119,"epoch_ra_deg":306.114218,"epoch_dec_deg":77.722943,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1756","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":2.6456703654315807e+25,"mass_msun":0.0000133055,"constellation":"Cepheus","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-1756-b","radius_km":12387.907075584002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1756","host_v_mag":13.88,"uncertainties":{"radius_km":[1299.662311731,2211.867932224],"distance_ly":[0.3631751265875938,0.3631751265875938],"host_mass_solar":[0.020155,0.020155],"inclination_deg":[4.76092,1.77317],"orbital_period_days":[0.00001651497,0.00001534636]},"host_mass_solar":0.556454,"inclination_deg":87.43642,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.562607,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":3891.86,"orbital_period_days":2.78301736297,"transit_midpoint_bjd":2458859.47478748,"equilibrium_temperature_k":696.39},"designations":[{"catalog":"Exoplanet","designation":"TOI-1756 b"},{"catalog":"Host star","designation":"TOI-1756"}],"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."}