{"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":"2026-09-05T13:14:33.718Z","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":"gj-1214-b","name":"GJ 1214 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":47.758099919929585,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":258.8313991,"dec_deg":4.9606795,"epoch_ra_deg":259.162891,"epoch_dec_deg":4.929893,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 1214","semi_major_axis_km":2251447.9540349995,"periapsis_km":null,"mass_kg":5.02259317681255e+25,"mass_msun":0.0000252593,"constellation":"Ophiuchus","discovered":"2009","featured":true,"url":"https://spacecatalog.org/object/gj-1214-b","radius_km":17431.3473,"radius_kind":null,"data_quality":null,"description":"The archetypal sub-Neptune: a class of planet with no Solar System counterpart, wrapped in a haze thick enough to have defeated a decade of attempts to see through it.","properties":{"host_star":"GJ 1214","host_v_mag":15.1,"eccentricity":0.0062,"uncertainties":{"mass_kg":[2.0902587537269827e+24,2.1499804324048965e+24],"radius_km":[197.7211,210.4773],"distance_ly":[0.12133017251062854,0.12133017251062854],"eccentricity":[0.0044,0.0079],"host_mass_solar":[0.0041,0.0042],"inclination_deg":[0.085,0.094],"host_radius_solar":[0.0024,0.0025],"host_temperature_k":[43,43],"semi_major_axis_km":[16455.765777,16455.765777],"orbital_period_days":[1.7e-8,1.8e-8],"argument_of_periastron_deg":[61,7.5]},"host_mass_solar":0.182,"inclination_deg":88.98,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.2162,"planets_in_system":1,"discovery_facility":"MEarth Project","host_spectral_type":"M4 V","host_temperature_k":3101,"orbital_period_days":1.580404531,"periastron_epoch_bjd":2459639.725,"transit_midpoint_bjd":2459639.7812619,"equilibrium_temperature_k":567,"argument_of_periastron_deg":77},"designations":[{"catalog":"Exoplanet","designation":"GJ 1214 b"},{"catalog":"Host star","designation":"GJ 1214"}],"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."}