{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T05:28:42.532Z","years_from_j2000":26.669,"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-74-b","name":"Kepler-74 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3840.654425803512,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":293.0925275,"dec_deg":41.3555095,"epoch_ra_deg":293.314681,"epoch_dec_deg":41.412279,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-74","semi_major_axis_km":11683593.70167,"periapsis_km":null,"mass_kg":1.19574745048919e+27,"mass_msun":0.000601359,"constellation":"Cygnus","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/kepler-74-b","radius_km":68628.356,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-74","host_v_mag":14.487,"eccentricity":0,"uncertainties":{"mass_kg":[2.277784824775632e+26,2.277784824775632e+26],"radius_km":[1403.182,1403.182],"distance_ly":[92.90564419261436,92.90564419261436],"host_mass_solar":[0.04,0.04],"inclination_deg":[0.07,0.07],"host_radius_solar":[0.04,0.04],"host_temperature_k":[100,100],"semi_major_axis_km":[104718.50949,104718.50949],"orbital_period_days":[0.000006,0.000006],"argument_of_periastron_deg":[21,21]},"host_mass_solar":1.18,"inclination_deg":87.46,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.12,"planets_in_system":1,"discovery_facility":"Kepler","host_spectral_type":"F8 V","host_temperature_k":6000,"orbital_period_days":7.340711,"periastron_epoch_bjd":2454967.04,"transit_midpoint_bjd":2455187.56737,"equilibrium_temperature_k":1078,"argument_of_periastron_deg":64},"designations":[{"catalog":"Exoplanet","designation":"Kepler-74 b"},{"catalog":"Host star","designation":"Kepler-74"}],"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":"2026-09-01T22:58:55.274Z","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."}