{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T06:56:59.613Z","years_from_j2000":26.677,"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-237-c","name":"TOI-237 c","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":124.18371465927234,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":353.2435381,"dec_deg":-29.416487,"epoch_ra_deg":353.598587,"epoch_dec_deg":-29.268204,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-237","semi_major_axis_km":2393565.9312,"periapsis_km":null,"mass_kg":1.134711894880362e+25,"mass_msun":0.00000570663,"constellation":"Sculptor","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-237-c","radius_km":7691.988600000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-237","host_v_mag":16.37,"uncertainties":{"radius_km":[223.23350000000002,223.23350000000002],"distance_ly":[0.7387441955284239,0.7475504177267759],"host_mass_solar":[0.035,0.0385],"inclination_deg":[0.47,0.49],"host_radius_solar":[0.0067,0.0047],"host_temperature_k":[48,47],"semi_major_axis_km":[89758.72241999999,74798.93535],"orbital_period_days":[0.000001,0.0000013]},"host_mass_solar":0.1698,"inclination_deg":89.14,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.2056,"planets_in_system":2,"discovery_facility":"La Silla Observatory","host_spectral_type":"M4.5 V","host_temperature_k":3226,"orbital_period_days":1.74486147,"transit_midpoint_bjd":2459540.35059,"equilibrium_temperature_k":515},"designations":[{"catalog":"Exoplanet","designation":"TOI-237 c"},{"catalog":"Host star","designation":"TOI-237"}],"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."}