{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.688","julian_year":2026.688,"time":"2026-09-09T04:12:08.466Z","years_from_j2000":26.688,"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-444-b","name":"TOI-444 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":187.20495458721237,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":64.1839982,"dec_deg":-26.7664071,"epoch_ra_deg":64.460909,"epoch_dec_deg":-26.699489,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-444","semi_major_axis_km":19896516.8031,"periapsis_km":null,"mass_kg":4.837455972911017e+25,"mass_msun":0.0000243283,"constellation":"Eridanus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-444-b","radius_km":17667.337,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-444","host_v_mag":9.86,"uncertainties":{"radius_km":[1275.6200000000001,1275.6200000000001],"distance_ly":[0.2694051679940301,0.27005748074946356],"host_mass_solar":[0.13,0.13],"inclination_deg":[0.314,0.314],"host_radius_solar":[0.053,0.053],"host_temperature_k":[70,70],"semi_major_axis_km":[897587.2241999999,897587.2241999999],"orbital_period_days":[0.00004,0.00004]},"host_mass_solar":0.96,"inclination_deg":89.647,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.779,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K1/2 V","host_temperature_k":5225,"orbital_period_days":17.9636,"transit_midpoint_bjd":2459190.0391,"equilibrium_temperature_k":609},"designations":[{"catalog":"Exoplanet","designation":"TOI-444 b"},{"catalog":"Host star","designation":"TOI-444"}],"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."}