{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T04:23:48.451Z","years_from_j2000":26.679,"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":"qatar-8-b","name":"Qatar-8 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":918.1236801450783,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":157.4123405,"dec_deg":70.5270835,"epoch_ra_deg":157.922602,"epoch_dec_deg":70.38962,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Qatar-8","semi_major_axis_km":7090939.071179999,"periapsis_km":null,"mass_kg":7.042077560788697e+26,"mass_msun":0.000354156,"constellation":"Ursa Major","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/qatar-8-b","radius_km":91867.3779265,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Qatar-8","host_v_mag":11.71,"eccentricity":0,"uncertainties":{"mass_kg":[1.176843150320483e+26,1.176843150320483e+26],"radius_km":[1572.8267038000001,1572.8267038000001],"distance_ly":[8.294156685336786,8.44092705530932],"host_mass_solar":[0.051,0.051],"inclination_deg":[0.7,0.7],"host_radius_solar":[0.02,0.02],"host_temperature_k":[51,51],"semi_major_axis_km":[119678.29656,119678.29656],"orbital_period_days":[0.001,0.001]},"host_mass_solar":1.029,"inclination_deg":89.29,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.315,"planets_in_system":1,"discovery_facility":"Qatar","host_spectral_type":"G0 V","host_temperature_k":5738,"orbital_period_days":3.71495,"transit_midpoint_bjd":2458210.8398,"equilibrium_temperature_k":1457},"designations":[{"catalog":"Exoplanet","designation":"Qatar-8 b"},{"catalog":"Host star","designation":"Qatar-8"}],"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."}