{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T19:36:41.315Z","years_from_j2000":26.684,"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-4113-b","name":"HD 4113 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":136.57048157219882,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":10.8027515,"dec_deg":-37.9831248,"epoch_ra_deg":11.126626,"epoch_dec_deg":-37.835832,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 4113","semi_major_axis_km":191485274.496,"periapsis_km":null,"mass_kg":3.2325061933797234e+27,"mass_msun":0.00162567,"constellation":"Sculptor","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/hd-4113-b","radius_km":86104.35,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 4113","host_v_mag":7.88,"eccentricity":0.899,"uncertainties":{"mass_kg":[1.1198935136773001e+26,7.592498399026883e+25],"distance_ly":[0.3078916205646058,0.3095224024531895],"eccentricity":[0.003,0.004],"host_mass_solar":[0.008,0.008],"host_radius_solar":[0.035728,0.019044],"host_temperature_k":[26,26],"semi_major_axis_km":[598391.4828,598391.4828],"orbital_period_days":[0.04316,0.06135],"argument_of_periastron_deg":[1.573,1.942]},"host_mass_solar":1.008,"stars_in_system":3,"discovery_method":"Radial Velocity","host_radius_solar":1.077514,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"G5 V","host_temperature_k":5688,"orbital_period_days":526.5239,"periastron_epoch_bjd":2451145.39,"equilibrium_temperature_k":251.65,"argument_of_periastron_deg":319.514},"designations":[{"catalog":"Exoplanet","designation":"HD 4113 b"},{"catalog":"Host star","designation":"HD 4113"}],"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."}