{"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":"2026-09-05T15:37:33.777Z","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-827-b","name":"Kepler-827 b","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":6675.377351453044,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":294.9660027,"dec_deg":42.7085608,"epoch_ra_deg":295.18411,"epoch_dec_deg":42.769863,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-827","semi_major_axis_km":41019736.14594,"periapsis_km":null,"mass_kg":1.6124853243036723e+26,"mass_msun":0.0000810942,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-827-b","radius_km":35908.703,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-827","host_v_mag":15.865,"eccentricity":0,"uncertainties":{"radius_km":[2933.9260000000004,4464.67],"distance_ly":[473.4485978936247,549.8018059171144],"host_mass_solar":[0.061,0.066],"host_radius_solar":[0.073,0.113],"host_temperature_k":[142.49,179.4],"orbital_period_days":[0.00009288,0.00009288]},"host_mass_solar":0.93,"inclination_deg":89.69,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.91,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5602,"orbital_period_days":51.92927591,"transit_midpoint_bjd":2454984.93175,"equilibrium_temperature_k":574},"designations":[{"catalog":"Exoplanet","designation":"Kepler-827 b"},{"catalog":"Host star","designation":"Kepler-827"}],"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."}