{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T16:14:33.505Z","years_from_j2000":26.681,"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":"hd-12235-c","name":"HD 12235 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":103.59607178503606,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":30.0391601,"dec_deg":3.0959098,"epoch_ra_deg":30.387423,"epoch_dec_deg":3.226309,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 12235","semi_major_axis_km":3322568708.2469997,"periapsis_km":null,"mass_kg":1.872689730118786e+28,"mass_msun":0.00941803,"constellation":"Pisces","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-12235-c","radius_km":79726.25,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 12235","host_v_mag":5.88051,"eccentricity":0.174,"uncertainties":{"mass_kg":[3.3805599121846355e+27,6.055017473223939e+27],"distance_ly":[0.3476826986460485,0.3499657932900657],"eccentricity":[0.154,0.11],"host_mass_solar":[0.134,0.134],"inclination_deg":[11.804,12.651],"host_radius_solar":[0.055225,0.08977],"host_temperature_k":[118.21,92.66],"semi_major_axis_km":[413787710.3562,578345368.1262],"orbital_period_days":[6058.52006,9732.19598],"argument_of_periastron_deg":[31.067,15.493]},"host_mass_solar":1.1,"inclination_deg":47.738,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.80185,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_temperature_k":5986,"orbital_period_days":36336.70679,"periastron_epoch_bjd":2411054.478,"equilibrium_temperature_k":82.22,"argument_of_periastron_deg":79.772},"designations":[{"catalog":"Exoplanet","designation":"HD 12235 c"}],"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."}