{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T18:52:32.747Z","years_from_j2000":26.676,"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":"corot-27-b","name":"CoRoT-27 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3295.0926527967154,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":278.4958319,"dec_deg":5.5383811,"epoch_ra_deg":278.825553,"epoch_dec_deg":5.558633,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CoRoT-27","semi_major_axis_km":7120858.64532,"periapsis_km":null,"mass_kg":1.9720755237912593e+28,"mass_msun":0.00991785,"constellation":"Serpens","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/corot-27-b","radius_km":71989.6147,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CoRoT-27","host_v_mag":15.774,"uncertainties":{"mass_kg":[1.0439349432899331e+27,1.0439349432899331e+27],"radius_km":[3144.4033,3144.4033],"distance_ly":[199.0728067031915,225.8959072066165],"host_mass_solar":[0.11,0.11],"inclination_deg":[0.87,1.2],"host_radius_solar":[0.06,0.18],"host_temperature_k":[120,120],"semi_major_axis_km":[987345.94662,987345.94662],"orbital_period_days":[0.00006,0.00006]},"host_mass_solar":1.05,"inclination_deg":86.7,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.08,"planets_in_system":1,"discovery_facility":"CoRoT","host_spectral_type":"G2","host_temperature_k":5900,"orbital_period_days":3.57532,"transit_midpoint_bjd":2455748.684,"eccentricity_upper_limit":0.065,"equilibrium_temperature_k":1500},"designations":[{"catalog":"Exoplanet","designation":"CoRoT-27 b"},{"catalog":"Host star","designation":"CoRoT-27"}],"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."}