{"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":"2026-09-07T13:17:49.897Z","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-2015-c","name":"TOI-2015 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":154.41678009172588,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":232.1326528,"dec_deg":27.361073,"epoch_ra_deg":232.416535,"epoch_dec_deg":27.267727,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2015","semi_major_axis_km":6168219.404702399,"periapsis_km":null,"mass_kg":5.3212015702021186e+25,"mass_msun":0.0000267611,"constellation":"Corona Borealis","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-2015-c","radius_km":18687.833000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2015","host_v_mag":16.11,"eccentricity":0.00033,"uncertainties":{"mass_kg":[2.3888671471165517e+24,2.269423789760724e+24],"distance_ly":[0.3672520813090531,0.3695351759530703],"eccentricity":[0.0002,0.0003],"host_mass_solar":[0.0312,0.0353],"inclination_deg":[0.24,0.27],"host_radius_solar":[0.0051,0.0029],"host_temperature_k":[28,14],"semi_major_axis_km":[598.3914828,598.3914828],"orbital_period_days":[0.000041,0.000042]},"host_mass_solar":0.3041,"inclination_deg":85.7,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":0.3273,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"M4 +/- 0.5","host_temperature_k":3297,"orbital_period_days":5.582796,"equilibrium_temperature_k":448},"designations":[{"catalog":"Exoplanet","designation":"TOI-2015 c"},{"catalog":"Host star","designation":"TOI-2015"}],"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."}