{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T16:21:03.348Z","years_from_j2000":26.686,"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-206893-b","name":"HD 206893 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":132.93579489892343,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":326.3416874,"dec_deg":-12.7833522,"epoch_ra_deg":326.705053,"epoch_dec_deg":-12.659847,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 206893","semi_major_axis_km":1608177110.0249999,"periapsis_km":null,"mass_kg":3.701342969525605e+28,"mass_msun":0.0186146,"constellation":"Capricornus","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/hd-206893-b","radius_km":89364.999721447,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 206893","host_v_mag":6.68804,"eccentricity":0.069,"uncertainties":{"mass_kg":[2.467561979683737e+27,2.657374439659409e+27],"radius_km":[1429.8399705410002,1429.8399705410002],"distance_ly":[0.3476826986460485,0.34963963691234895],"eccentricity":[0.012,0.011],"host_mass_solar":[0.02,0.03],"inclination_deg":[0.5,0.4],"host_radius_solar":[0.063092,0.04631],"host_temperature_k":[100,100],"semi_major_axis_km":[11967829.656,11967829.656],"orbital_period_days":[200,200],"argument_of_periastron_deg":[5,7]},"host_mass_solar":1.31,"inclination_deg":142,"stars_in_system":1,"discovery_method":"Imaging","host_radius_solar":1.31116,"planets_in_system":2,"discovery_facility":"Gemini Observatory","host_spectral_type":"F5 V","host_temperature_k":6500,"orbital_period_days":11100,"equilibrium_temperature_k":1429.2,"argument_of_periastron_deg":102},"designations":[{"catalog":"Exoplanet","designation":"HD 206893 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."}