{"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":"2026-09-07T14:37:38.615Z","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-167042-b","name":"HD 167042 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":161.98002033459943,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":272.6326268,"dec_deg":54.2876184,"epoch_ra_deg":272.768879,"epoch_dec_deg":54.292367,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 167042","semi_major_axis_km":182509402.25399998,"periapsis_km":null,"mass_kg":2.651680065866111e+27,"mass_msun":0.00133357,"constellation":"Draco","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/hd-167042-b","radius_km":86742.16,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 167042","host_v_mag":5.98796,"eccentricity":0.01,"uncertainties":{"mass_kg":[8.351748240124004e+25,5.884186261037484e+25],"distance_ly":[0.43965879716217016,0.43965879716217016],"eccentricity":[0.004,0.033],"host_mass_solar":[0.19,0.17],"host_radius_solar":[0.4,0.43],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.41,0.43],"argument_of_periastron_deg":[135.1,69.5]},"host_mass_solar":1.39,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":4.63,"planets_in_system":1,"discovery_facility":"Lick Observatory","host_spectral_type":"K1 IV","host_temperature_k":4919,"orbital_period_days":417.67,"periastron_epoch_bjd":2452935.5,"transit_midpoint_bjd":2454232,"equilibrium_temperature_k":462.08,"argument_of_periastron_deg":54.4},"designations":[{"catalog":"Exoplanet","designation":"HD 167042 b"},{"catalog":"Host star","designation":"HD 167042"}],"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."}