{"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":"2026-09-08T07:31:16.369Z","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":"qatar-2-b","name":"Qatar-2 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":591.5628685199662,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":207.6554928,"dec_deg":-6.8040714,"epoch_ra_deg":208.00795,"epoch_dec_deg":-6.93744,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Qatar-2","semi_major_axis_km":3220842.1561709996,"periapsis_km":null,"mass_kg":4.7337492778868197e+27,"mass_msun":0.00238067,"constellation":"Virgo","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/qatar-2-b","radius_km":89650.5736,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Qatar-2","host_v_mag":13.443,"eccentricity":0,"uncertainties":{"mass_kg":[1.0249434494703564e+26,1.0249434494703564e+26],"radius_km":[931.2026,931.2026],"distance_ly":[3.9236612239324233,3.9725846805899345],"host_mass_solar":[0.021,0.021],"inclination_deg":[0.08,0.08],"host_radius_solar":[0.008,0.008],"host_temperature_k":[50,50],"semi_major_axis_km":[29919.57414,29919.57414],"orbital_period_days":[2.6e-7,2.6e-7]},"host_mass_solar":0.743,"inclination_deg":86.12,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.776,"planets_in_system":1,"discovery_facility":"Qatar","host_temperature_k":4645,"orbital_period_days":1.33711647,"transit_midpoint_bjd":2455624.267096,"equilibrium_temperature_k":1344},"designations":[{"catalog":"Exoplanet","designation":"Qatar-2 b"},{"catalog":"Host star","designation":"Qatar-2"}],"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."}