{"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":"2026-09-08T01:28:44.129Z","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":"toi-5916-b","name":"TOI-5916 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":651.4125638309886,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":325.2995114,"dec_deg":9.5990534,"epoch_ra_deg":325.629031,"epoch_dec_deg":9.720973,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5916","semi_major_axis_km":3919464.2123399996,"periapsis_km":null,"mass_kg":1.3533628396205696e+27,"mass_msun":0.000680626,"constellation":"Pegasus","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-5916-b","radius_km":72421.39580584501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5916","host_v_mag":16.602,"eccentricity":0.09,"uncertainties":{"mass_kg":[2.1638620438421048e+26,4.574480285592862e+26],"radius_km":[2359.235973716,2287.743978378],"distance_ly":[10.746852645766696,11.105624661255113],"eccentricity":[0.062,0.114],"host_mass_solar":[0.011,0.011],"inclination_deg":[0.58,0.47],"host_radius_solar":[0.015,0.015],"host_temperature_k":[80,80],"semi_major_axis_km":[433833.82502999995,314155.52846999996],"orbital_period_days":[0.000001,0.000001],"argument_of_periastron_deg":[54,89]},"host_mass_solar":0.477,"inclination_deg":89.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.48,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2±0.5","host_temperature_k":3613,"orbital_period_days":2.367128,"transit_midpoint_bjd":2460255.6055,"equilibrium_temperature_k":683,"argument_of_periastron_deg":114},"designations":[{"catalog":"Exoplanet","designation":"TOI-5916 b"},{"catalog":"Host star","designation":"TOI-5916"}],"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."}