{"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":"2026-09-07T21:36:51.501Z","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-1836-c","name":"TOI-1836 c","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":625.0754363303616,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":245.9079242,"dec_deg":54.6900774,"epoch_ra_deg":246.060835,"epoch_dec_deg":54.627091,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1836","semi_major_axis_km":4621078.225923,"periapsis_km":null,"mass_kg":4.777734294233103e+25,"mass_msun":0.0000240279,"constellation":"Draco","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1836-c","radius_km":16582.267776199,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1836","host_v_mag":9.765,"eccentricity":0,"uncertainties":{"radius_km":[919.0619504310001,1411.6422945260001],"distance_ly":[3.0006386749940397,3.0299927489885463],"host_mass_solar":[0.0404,0.0243],"host_radius_solar":[0.0253,0.032],"host_temperature_k":[69,91],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[0.0000079,0.0000079]},"host_mass_solar":1.2518,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.6454,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6237,"orbital_period_days":1.7727471,"transit_midpoint_bjd":2459739.67,"equilibrium_temperature_k":2007.6,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1836 c"},{"catalog":"Host star","designation":"TOI-1836"}],"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."}