{"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":"2026-09-06T13:29:23.060Z","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":"hip-113103-c","name":"HIP 113103 c","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":150.7240375832169,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":343.5723794,"dec_deg":-43.0102291,"epoch_ra_deg":343.957546,"epoch_dec_deg":-42.867275,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 113103","semi_major_axis_km":15676360.870652998,"periapsis_km":null,"mass_kg":3.7923265960475255e+25,"mass_msun":0.0000190722,"constellation":"Grus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hip-113103-c","radius_km":15307.44,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 113103","host_v_mag":9.95,"eccentricity":0.17,"uncertainties":{"radius_km":[510.24800000000005,637.8100000000001],"distance_ly":[0.2804944848363993,0.28179911034726635],"eccentricity":[0.13,0.17],"host_mass_solar":[0.038,0.038],"inclination_deg":[0.22,0.4],"host_radius_solar":[0.013,0.013],"host_temperature_k":[100,100],"semi_major_axis_km":[52359.254745,67319.04181499999],"orbital_period_days":[0.000019,0.000019],"argument_of_periastron_deg":[60,100]},"host_mass_solar":0.761,"inclination_deg":89.24,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.742,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":4930,"orbital_period_days":14.245648,"transit_midpoint_bjd":2458337.0559,"equilibrium_temperature_k":585,"argument_of_periastron_deg":-70},"designations":[{"catalog":"Exoplanet","designation":"HIP 113103 c"},{"catalog":"Host star","designation":"HIP 113103"}],"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."}