{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T07:20:56.809Z","years_from_j2000":26.683,"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-815-c","name":"TOI-815 c","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":194.7535177930887,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":155.8719377,"dec_deg":-43.8349248,"epoch_ra_deg":156.155643,"epoch_dec_deg":-43.970649,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-815","semi_major_axis_km":28872389.0451,"periapsis_km":null,"mass_kg":1.4034594489309741e+26,"mass_msun":0.000070582,"constellation":"Vela","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-815-c","radius_km":16710.622000000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-815","host_v_mag":10.217,"uncertainties":{"mass_kg":[1.433320288269931e+25,1.433320288269931e+25],"radius_km":[574.029,637.8100000000001],"distance_ly":[0.42106788363231573,0.42237250914318275],"host_mass_solar":[0.036,0.036],"inclination_deg":[0.026,0.026],"host_radius_solar":[0.009,0.009],"host_temperature_k":[77,77],"semi_major_axis_km":[598391.4828,598391.4828],"orbital_period_days":[0.000097,0.000099]},"host_mass_solar":0.776,"inclination_deg":89.107,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.77,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K3 V","host_temperature_k":4869,"orbital_period_days":34.976145,"transit_midpoint_bjd":2459288.6331,"eccentricity_upper_limit":0.22,"equilibrium_temperature_k":469},"designations":[{"catalog":"Exoplanet","designation":"TOI-815 c"},{"catalog":"Host star","designation":"TOI-815"}],"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."}