{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T06:24:14.710Z","years_from_j2000":26.677,"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":"gj-414-a-c","name":"GJ 414 A c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":38.77771021587677,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":167.7745044,"dec_deg":30.4451688,"epoch_ra_deg":168.13824,"epoch_dec_deg":30.299408,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 414 A","semi_major_axis_km":209437018.97999996,"periapsis_km":null,"mass_kg":3.214817963232099e+26,"mass_msun":0.000161678,"constellation":"Ursa Major","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/gj-414-a-c","radius_km":53576.04000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 414 A","host_v_mag":8.31,"eccentricity":0.105,"uncertainties":{"mass_kg":[5.124120030565003e+25,5.482450102632486e+25],"radius_km":[15945.25,22961.160000000003],"distance_ly":[0.02185247730702181,0.02185247730702181],"eccentricity":[0.703,0.11],"host_mass_solar":[0.08,0.08],"host_radius_solar":[0.14,0.14],"host_temperature_k":[109,109],"semi_major_axis_km":[8975872.241999999,8227882.888499999],"orbital_period_days":[3.63,4.35],"argument_of_periastron_deg":[200,74]},"host_mass_solar":0.65,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":0.68,"planets_in_system":2,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"K7 V","host_temperature_k":4120,"orbital_period_days":749.83,"periastron_epoch_bjd":2454210.36,"transit_midpoint_bjd":2457228,"equilibrium_temperature_k":124.7,"argument_of_periastron_deg":74},"designations":[{"catalog":"Exoplanet","designation":"GJ 414 A c"},{"catalog":"Host star","designation":"GJ 414 A"}],"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."}