{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:06:58.389Z","years_from_j2000":26.68,"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-10975-b","name":"HD 10975 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":379.9917494226691,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":27.1628025,"dec_deg":37.9527542,"epoch_ra_deg":27.559153,"epoch_dec_deg":38.086633,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 10975","semi_major_axis_km":142117977.165,"periapsis_km":null,"mass_kg":8.541560698905243e+26,"mass_msun":0.000429567,"constellation":"Andromeda","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/hd-10975-b","radius_km":91206.83000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 10975","host_v_mag":5.94188,"eccentricity":0.442,"uncertainties":{"mass_kg":[2.8471868996350808e+26,1.1388747598540324e+26],"distance_ly":[3.180024682738248,3.180024682738248],"eccentricity":[0.389,0.04],"host_mass_solar":[0.35,0.34],"host_radius_solar":[0.38,0.45],"semi_major_axis_km":[11967829.656,8975872.241999999],"orbital_period_days":[0.1,12.7],"argument_of_periastron_deg":[35,153]},"host_mass_solar":1.41,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":11.16,"planets_in_system":1,"discovery_facility":"Okayama Astrophysical Observatory","host_spectral_type":"K0 III","host_temperature_k":4840,"orbital_period_days":283.8,"periastron_epoch_bjd":2455450.7,"equilibrium_temperature_k":799.92,"argument_of_periastron_deg":135},"designations":[{"catalog":"Exoplanet","designation":"HD 10975 b"},{"catalog":"Host star","designation":"HD 10975"}],"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."}