{"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":"2026-09-07T22:09:44.128Z","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-185269-b","name":"HD 185269 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":169.57424543335608,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":294.2987668,"dec_deg":28.499514,"epoch_ra_deg":294.568486,"epoch_dec_deg":28.559289,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 185269","semi_major_axis_km":11519036.043899998,"periapsis_km":null,"mass_kg":1.9171154545543356e+27,"mass_msun":0.000964145,"constellation":"Cygnus","discovered":"2006","featured":false,"url":"https://spacecatalog.org/object/hd-185269-b","radius_km":88017.78000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 185269","host_v_mag":6.67973,"eccentricity":0.229,"uncertainties":{"mass_kg":[2.6573877587881877e+25,2.6573877587881877e+25],"distance_ly":[0.2739713572820645,0.2749498264152147],"eccentricity":[0.014,0.014],"semi_major_axis_km":[508632.76037999993,508632.76037999993],"orbital_period_days":[0.00027,0.00027],"argument_of_periastron_deg":[3.5,3.5]},"host_mass_solar":1.3,"stars_in_system":3,"discovery_method":"Radial Velocity","host_radius_solar":2,"planets_in_system":1,"discovery_facility":"Lick Observatory","host_spectral_type":"G0 IV","host_temperature_k":5923,"orbital_period_days":6.83776,"periastron_epoch_bjd":2453154.25,"equilibrium_temperature_k":1455.61,"argument_of_periastron_deg":176.2},"designations":[{"catalog":"Exoplanet","designation":"HD 185269 b"},{"catalog":"Host star","designation":"HD 185269"}],"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."}