{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T13:34:40.193Z","years_from_j2000":26.675,"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":"uz-for-c","name":"UZ For c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":781.4833189818722,"distance_method":"NASA Exoplanet Archive sy_dist (Gaia DR2, 2018A&A...616A...1G)","ra_deg":53.8694682,"dec_deg":-25.7393857,"epoch_ra_deg":54.156009,"epoch_dec_deg":-25.649679,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"UZ For","semi_major_axis_km":418874037.9599999,"periapsis_km":null,"mass_kg":1.4615089206059063e+28,"mass_msun":0.00735014,"constellation":"Fornax","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/uz-for-c","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"UZ For","host_v_mag":16.7753,"eccentricity":0.05,"uncertainties":{"mass_kg":[2.277784824775632e+27,2.277784824775632e+27],"distance_ly":[13.898115619723647,13.898115619723647],"eccentricity":[0.05,0.05],"host_temperature_k":[307.06,1763.1],"semi_major_axis_km":[74798935.35,74798935.35],"orbital_period_days":[91.25,91.25]},"host_mass_solar":0.7,"stars_in_system":2,"discovery_method":"Eclipse Timing Variations","planets_in_system":2,"discovery_facility":"Multiple Observatories","host_temperature_k":5286.9,"orbital_period_days":1916.25},"designations":[{"catalog":"Exoplanet","designation":"UZ For c"},{"catalog":"Host star","designation":"UZ For"}],"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."}