{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T08:33:49.284Z","years_from_j2000":26.674,"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":"nu-oct-a-b","name":"ν Oct A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":69.14482591957189,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":325.3702792,"dec_deg":-77.3910853,"epoch_ra_deg":326.097234,"epoch_dec_deg":-77.268816,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"ν Oct A","semi_major_axis_km":185501359.66799998,"periapsis_km":null,"mass_kg":4.1568928734672184e+27,"mass_msun":0.00209056,"constellation":"Octans","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/nu-oct-a-b","radius_km":84828.73000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"ν Oct A","host_v_mag":3.73,"eccentricity":0.195,"uncertainties":{"mass_kg":[2.0879370597323927e+26,2.0879370597323927e+26],"distance_ly":[4.242022464221737,4.242022464221737],"eccentricity":[0.037,0.05],"host_mass_solar":[0.06,0.06],"host_radius_solar":[0.1,0.1],"host_temperature_k":[30,21],"semi_major_axis_km":[2991957.414,2991957.414],"orbital_period_days":[6,7.7],"argument_of_periastron_deg":[15,32]},"host_mass_solar":1.57,"inclination_deg":108.2,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":5.04,"planets_in_system":1,"discovery_facility":"University of Canterbury Mt John Observatory","host_spectral_type":"K1 IV","host_temperature_k":4910,"orbital_period_days":402.4,"equilibrium_temperature_k":477.33,"argument_of_periastron_deg":100},"designations":[{"catalog":"Exoplanet","designation":"nu Oct A b"},{"catalog":"Host star","designation":"nu Oct A"}],"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."}