{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T12:14:17.137Z","years_from_j2000":26.686,"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":"kepler-1976-b","name":"Kepler-1976 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":4287.358200724364,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":292.16706,"dec_deg":48.7275345,"epoch_ra_deg":292.352459,"epoch_dec_deg":48.782061,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1976","semi_major_axis_km":8452279.69455,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/kepler-1976-b","radius_km":77876.60100000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1976","host_v_mag":15.445,"eccentricity":0,"uncertainties":{"radius_km":[9312.026,12501.076000000001],"distance_ly":[136.48013625557127,136.48013625557127],"host_mass_solar":[0.055,0.073],"host_radius_solar":[0.13,0.173],"host_temperature_k":[77,77],"orbital_period_days":[5.15e-7,5.15e-7]},"host_mass_solar":0.976,"inclination_deg":86.15,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":1.082,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5712,"orbital_period_days":4.959319244,"transit_midpoint_bjd":2455005.2585292,"equilibrium_temperature_k":1103},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1976 b"},{"catalog":"Host star","designation":"Kepler-1976"}],"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."}