{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:13:01.606Z","years_from_j2000":26.678,"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":"epic-212587672-c","name":"EPIC 212587672 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":1043.9287181579807,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":205.4445125,"dec_deg":-10.8625468,"epoch_ra_deg":205.800757,"epoch_dec_deg":-10.998367,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"EPIC 212587672","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":3.5773285528070363e+25,"mass_msun":0.0000179909,"constellation":"Virgo","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/epic-212587672-c","radius_km":14797.192,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"EPIC 212587672","host_v_mag":12.488,"uncertainties":{"radius_km":[765.3720000000001,1211.8390000000002],"distance_ly":[20.065140357134055,20.84791566365424],"host_mass_solar":[0.04,0.03],"inclination_deg":[1.02664,0.42114],"host_radius_solar":[0.03,0.04],"host_temperature_k":[78,77],"orbital_period_days":[0.000071,0.000068]},"host_mass_solar":0.99,"inclination_deg":89.42115,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.98,"planets_in_system":2,"discovery_facility":"K2","host_temperature_k":6004,"orbital_period_days":23.228555,"transit_midpoint_bjd":2457237.042492,"equilibrium_temperature_k":658},"designations":[{"catalog":"Exoplanet","designation":"EPIC 212587672 c"}],"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."}