{"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":"2026-09-07T20:56:38.409Z","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-10180-h","name":"HD 10180 h","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":127.07280785308726,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":24.4731133,"dec_deg":-60.5114881,"epoch_ra_deg":24.711307,"epoch_dec_deg":-60.374511,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 10180","semi_major_axis_km":505790400.8366999,"periapsis_km":null,"mass_kg":3.8460761068576485e+26,"mass_msun":0.000193425,"constellation":"Hydrus","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/hd-10180-h","radius_km":59954.14000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 10180","host_v_mag":7.33,"eccentricity":0.095,"uncertainties":{"mass_kg":[2.7471972191840344e+25,2.7471972191840344e+25],"distance_ly":[0.12589636179866295,0.1262225181763797],"eccentricity":[0.086,0.086],"host_mass_solar":[0.05,0.05],"host_radius_solar":[0.036,0.036],"host_temperature_k":[19,19],"semi_major_axis_km":[18101342.3547,18101342.3547],"orbital_period_days":[105.9,105.9],"argument_of_periastron_deg":[72,72]},"host_mass_solar":1.06,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.109,"planets_in_system":6,"discovery_facility":"La Silla Observatory","host_spectral_type":"G1 V","host_temperature_k":5911,"orbital_period_days":2205,"periastron_epoch_bjd":2453433.4,"equilibrium_temperature_k":163.24,"argument_of_periastron_deg":142},"designations":[{"catalog":"Exoplanet","designation":"HD 10180 h"}],"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."}