{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T15:23:16.988Z","years_from_j2000":26.686,"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-2587-a-b","name":"TOI-2587 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1218.764844433041,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":115.9317105,"dec_deg":-1.073333,"epoch_ra_deg":116.273398,"epoch_dec_deg":-1.137074,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2587 A","semi_major_axis_km":9499464.78945,"periapsis_km":null,"mass_kg":4.137911627708537e+26,"mass_msun":0.000208102,"constellation":"Monoceros","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-2587-a-b","radius_km":76996.883762601,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2587 A","host_v_mag":11.544,"eccentricity":0,"uncertainties":{"mass_kg":[8.731373157686481e+25,1.0249872839880724e+26],"radius_km":[2859.6800048630002,3002.663995539],"distance_ly":[18.825746121810432,19.416089165477736],"host_mass_solar":[0.07,0.14],"inclination_deg":[0.4,0.49],"host_radius_solar":[0.047,0.049],"host_temperature_k":[79,80],"semi_major_axis_km":[194477.23190999997,373994.67675],"orbital_period_days":[0.000011,0.000011]},"host_mass_solar":1.15,"inclination_deg":84.81,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.726,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5760,"orbital_period_days":5.45664,"transit_midpoint_bjd":2458950.09242,"equilibrium_temperature_k":1445},"designations":[{"catalog":"Exoplanet","designation":"TOI-2587 A b"},{"catalog":"Host star","designation":"TOI-2587 A"}],"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."}