{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T02:33:29.001Z","years_from_j2000":26.682,"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":"toi-1516-b","name":"TOI-1516 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":805.7823774043233,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":340.0846204,"dec_deg":69.5037313,"epoch_ra_deg":340.286916,"epoch_dec_deg":69.643669,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1516","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":5.998073735231237e+27,"mass_msun":0.00301652,"constellation":"Cepheus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-1516-b","radius_km":97229.11971887501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1516","host_v_mag":10.858,"uncertainties":{"mass_kg":[2.2777495197080647e+26,2.2777495197080647e+26],"radius_km":[2144.759987702,2144.759987702],"distance_ly":[4.416157354284707,4.46181924716505],"host_mass_solar":[0.06,0.06],"inclination_deg":[0.4,0.4],"host_radius_solar":[0.02,0.02],"host_temperature_k":[90,90],"orbital_period_days":[0.000002,0.000002]},"host_mass_solar":1.14,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.14,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F8 V","host_temperature_k":6520,"orbital_period_days":2.056014,"transit_midpoint_bjd":2458765.325,"equilibrium_temperature_k":1839},"designations":[{"catalog":"Exoplanet","designation":"TOI-1516 b"},{"catalog":"Host star","designation":"TOI-1516"}],"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."}