{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:45:51.403Z","years_from_j2000":26.678,"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-1576-b","name":"Kepler-1576 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1503.2873605342422,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.0739641,"dec_deg":40.3660239,"epoch_ra_deg":289.297328,"epoch_dec_deg":40.413005,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1576","semi_major_axis_km":10787502.456176998,"periapsis_km":null,"mass_kg":6.688828011926346e+24,"mass_msun":0.00000336391,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1576-b","radius_km":6633.224,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1576","host_v_mag":13.439,"eccentricity":0,"uncertainties":{"radius_km":[829.153,1849.649],"distance_ly":[8.858407218786752,8.966038823433276],"host_mass_solar":[0.067,0.074],"host_radius_solar":[0.114,0.284],"host_temperature_k":[147.58,104.99],"semi_major_axis_km":[41887.40379599999,41887.40379599999],"orbital_period_days":[0.0000594,0.0000594]},"host_mass_solar":1.05,"inclination_deg":88.54,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.06,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5876,"orbital_period_days":6.98471973,"transit_midpoint_bjd":2454968.99535,"equilibrium_temperature_k":1059},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1576 b"},{"catalog":"Host star","designation":"Kepler-1576"}],"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."}