{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T00:23:50.841Z","years_from_j2000":26.685,"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-206610-b","name":"HD 206610 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":480.07609548882897,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":325.8537599,"dec_deg":-7.4082451,"epoch_ra_deg":326.20906,"epoch_dec_deg":-7.285474,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 206610","semi_major_axis_km":260300295.01799998,"periapsis_km":null,"mass_kg":3.8646010549233934e+27,"mass_msun":0.00194356,"constellation":"Aquarius","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/hd-206610-b","radius_km":85466.54000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 206610","host_v_mag":8.34,"eccentricity":0.1,"uncertainties":{"mass_kg":[1.2337871737230871e+26,1.2337871737230871e+26],"distance_ly":[6.402449694579674,6.402449694579674],"eccentricity":[0.042,0.042],"semi_major_axis_km":[49367297.331,49367297.331],"orbital_period_days":[3.3,3.3],"argument_of_periastron_deg":[16,16]},"host_mass_solar":1.55,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":6.12,"planets_in_system":1,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"K0 III","host_temperature_k":4842,"orbital_period_days":673.2,"periastron_epoch_bjd":2454724,"equilibrium_temperature_k":437.88,"argument_of_periastron_deg":334},"designations":[{"catalog":"Exoplanet","designation":"HD 206610 b"},{"catalog":"Host star","designation":"HD 206610"}],"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."}