{"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":"2026-09-08T06:02:28.717Z","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-106270-b","name":"HD 106270 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":305.9607748085227,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":183.4049258,"dec_deg":-9.5135645,"epoch_ra_deg":183.750399,"epoch_dec_deg":-9.66301,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 106270","semi_major_axis_km":499656888.13799995,"periapsis_km":null,"mass_kg":2.1638620437226617e+28,"mass_msun":0.0108824,"constellation":"Virgo","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/hd-106270-b","radius_km":79088.44,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 106270","host_v_mag":7.58,"eccentricity":0.185,"uncertainties":{"mass_kg":[2.2777495197080646e+27,4.3656865794404574e+27],"distance_ly":[1.854525163697403,1.854525163697403],"eccentricity":[0.027,0.027],"inclination_deg":[15,16],"semi_major_axis_km":[29919574.14,29919574.14],"orbital_period_days":[16,16],"argument_of_periastron_deg":[6.1,6.1]},"host_mass_solar":1.39,"inclination_deg":63,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":2.66,"planets_in_system":1,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"G5 IV","host_temperature_k":5509,"orbital_period_days":1888,"periastron_epoch_bjd":2456635,"equilibrium_temperature_k":237.07,"argument_of_periastron_deg":3.3},"designations":[{"catalog":"Exoplanet","designation":"HD 106270 b"},{"catalog":"Host star","designation":"HD 106270"}],"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."}