{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T21:07:29.520Z","years_from_j2000":26.681,"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-2345-c","name":"TOI-2345 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":266.3200548172074,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":43.884794,"dec_deg":-34.9779745,"epoch_ra_deg":44.157601,"epoch_dec_deg":-34.868829,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2345","semi_major_axis_km":18804452.34699,"periapsis_km":null,"mass_kg":4.341766039884333e+25,"mass_msun":0.0000218354,"constellation":"Fornax","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-2345-c","radius_km":15632.723100000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2345","host_v_mag":11.483,"uncertainties":{"mass_kg":[1.463181127608888e+25,1.3556821059886432e+25],"radius_km":[293.3926,287.0145],"distance_ly":[0.5375057104771932,0.5397888051212104],"host_mass_solar":[0.033,0.033],"inclination_deg":[0.057,0.083],"host_radius_solar":[0.007,0.007],"host_temperature_k":[60,60],"semi_major_axis_km":[254316.38018999997,239356.59312],"orbital_period_days":[0.000041,0.000041]},"host_mass_solar":0.727,"inclination_deg":89.914,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.729,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K","host_temperature_k":4687,"orbital_period_days":21.064302,"transit_midpoint_bjd":2459120.3007,"equilibrium_temperature_k":544},"designations":[{"catalog":"Exoplanet","designation":"TOI-2345 c"},{"catalog":"Host star","designation":"TOI-2345"}],"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."}