{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T13:32:17.803Z","years_from_j2000":26.683,"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-196885-a-b","name":"HD 196885 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":111.44502501478948,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":309.9664609,"dec_deg":11.2500236,"epoch_ra_deg":310.287574,"epoch_dec_deg":11.344666,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 196885 A","semi_major_axis_km":354546953.559,"periapsis_km":null,"mass_kg":4.8969984865528976e+27,"mass_msun":0.00246277,"constellation":"Delphinus","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/hd-196885-a-b","radius_km":84190.92,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 196885 A","host_v_mag":6.39677,"eccentricity":0.48,"uncertainties":{"mass_kg":[3.0368473607719165e+26,3.0368473607719165e+26],"distance_ly":[0.18590913529854375,0.18688760443169397],"eccentricity":[0.06,0.06],"host_mass_solar":[0.05,0.05],"host_radius_solar":[0.05,0.05],"host_temperature_k":[44,44],"semi_major_axis_km":[2991957.414,2991957.414],"orbital_period_days":[15,15],"argument_of_periastron_deg":[7.6,7.6]},"host_mass_solar":1.28,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":1.31,"planets_in_system":1,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"F8 V","host_temperature_k":6254,"orbital_period_days":1333,"periastron_epoch_bjd":2451992,"equilibrium_temperature_k":224.21,"argument_of_periastron_deg":78},"designations":[{"catalog":"Exoplanet","designation":"HD 196885 A b"},{"catalog":"Host star","designation":"HD 196885 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."}