{"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":"2026-09-07T16:46:30.667Z","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-72659-b","name":"HD 72659 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":169.25852605972628,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":128.5128072,"dec_deg":-1.5686323,"epoch_ra_deg":128.853739,"epoch_dec_deg":-1.660326,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 72659","semi_major_axis_km":689197390.3148999,"periapsis_km":null,"mass_kg":5.67159630409697e+27,"mass_msun":0.00285233,"constellation":"Hydra","discovered":"2002","featured":false,"url":"https://spacecatalog.org/object/hd-72659-b","radius_km":84190.92,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 72659","host_v_mag":7.46,"eccentricity":0.2393,"uncertainties":{"mass_kg":[1.860162108000473e+26,4.908550214958935e+27],"distance_ly":[0.47031749666754397,0.4732529040669947],"eccentricity":[0.0098,0.0098],"host_mass_solar":[0.025,0.025],"inclination_deg":[39.755,39.898],"host_radius_solar":[0.06,0.06],"host_temperature_k":[61,61],"semi_major_axis_km":[5834316.9573,5834316.9573],"orbital_period_days":[10,10],"argument_of_periastron_deg":[2.6,2.6]},"host_mass_solar":1.033,"inclination_deg":77.583,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.36,"planets_in_system":2,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"G2 V","host_temperature_k":5929,"orbital_period_days":3549,"periastron_epoch_bjd":2453594,"transit_midpoint_bjd":2457164,"equilibrium_temperature_k":155.34,"argument_of_periastron_deg":-95.9},"designations":[{"catalog":"Exoplanet","designation":"HD 72659 b"}],"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."}