{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T19:26:28.791Z","years_from_j2000":26.67,"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-412-b","name":"Kepler-412 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3542.841037310354,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":286.1103053,"dec_deg":43.6809612,"epoch_ra_deg":286.316546,"epoch_dec_deg":43.720487,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-412","semi_major_axis_km":4333850.3141789995,"periapsis_km":null,"mass_kg":1.7861442007283462e+27,"mass_msun":0.000898278,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-412-b","radius_km":95870.9368089,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-412","host_v_mag":14.399,"eccentricity":0.0038,"uncertainties":{"mass_kg":[3.606454815498255e+25,2.3726676417751674e+26],"radius_km":[3288.6376534,3145.6534076000003],"distance_ly":[62.49156197052804,62.49156197052804],"eccentricity":[0.0032,0.0087],"host_mass_solar":[0.091,0.091],"inclination_deg":[0.079,0.084],"host_radius_solar":[0.035,0.035],"host_temperature_k":[90,90],"semi_major_axis_km":[137630.04104399998,139126.01975099999],"orbital_period_days":[3e-7,3e-7],"argument_of_periastron_deg":[49,150]},"host_mass_solar":1.167,"inclination_deg":80.559,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.287,"planets_in_system":1,"discovery_facility":"Kepler","host_spectral_type":"G3 V","host_temperature_k":5750,"orbital_period_days":1.7208604,"transit_midpoint_bjd":2454966.02122,"equilibrium_temperature_k":1850,"argument_of_periastron_deg":125},"designations":[{"catalog":"Exoplanet","designation":"Kepler-412 b"},{"catalog":"Host star","designation":"Kepler-412"}],"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":"2026-09-02T18:38:07.546Z","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."}