{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T07:12:54.462Z","years_from_j2000":26.68,"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":"wendelstein-2-b","name":"Wendelstein-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":1844.5480401030482,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":297.7909214,"dec_deg":16.9125679,"epoch_ra_deg":298.094532,"epoch_dec_deg":16.980623,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Wendelstein-2","semi_major_axis_km":3500590.1743799997,"periapsis_km":null,"mass_kg":1.387536036910118e+27,"mass_msun":0.000697812,"constellation":"Sagitta","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/wendelstein-2-b","radius_km":82873.66886568,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Wendelstein-2","host_v_mag":16.186,"uncertainties":{"mass_kg":[5.903197092736617e+26,1.0268905553602926e+27],"radius_km":[1501.3345809,1458.43930716],"distance_ly":[44.41923708124329,46.627315758385635],"host_mass_solar":[0.11,0.11],"inclination_deg":[1.04,0.98],"host_radius_solar":[0.1,0.1],"host_temperature_k":[195,195],"semi_major_axis_km":[224396.80604999998,224396.80604999998],"orbital_period_days":[8e-7,8e-7]},"host_mass_solar":0.73,"inclination_deg":87.87,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.66,"planets_in_system":1,"discovery_facility":"Haleakala Observatory","host_spectral_type":"K6 V","host_temperature_k":4591,"orbital_period_days":1.7522239,"transit_midpoint_bjd":2455679.2544,"eccentricity_upper_limit":0.057,"equilibrium_temperature_k":2470},"designations":[{"catalog":"Exoplanet","designation":"Wendelstein-2 b"},{"catalog":"Host star","designation":"Wendelstein-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."}