{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T02:20:30.076Z","years_from_j2000":26.679,"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":"k2-195-b","name":"K2-195 b","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":1027.4382517006222,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":199.8315191,"dec_deg":-8.5095364,"epoch_ra_deg":200.183099,"epoch_dec_deg":-8.650843,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-195","semi_major_axis_km":18071422.780559998,"periapsis_km":null,"mass_kg":5.948279196320214e+25,"mass_msun":0.0000299148,"constellation":"Virgo","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/k2-195-b","radius_km":19963.453,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-195","host_v_mag":12.524,"uncertainties":{"radius_km":[765.3720000000001,765.3720000000001],"distance_ly":[13.359365231277812,13.711614119211893],"host_mass_solar":[0.04,0.04],"inclination_deg":[1.56713,0.71081],"host_radius_solar":[0.02,0.02],"host_temperature_k":[87,87],"semi_major_axis_km":[254316.38018999997,239356.59312],"orbital_period_days":[0.001168,0.001201]},"host_mass_solar":0.94,"inclination_deg":89.04065,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.99,"planets_in_system":2,"discovery_facility":"K2","host_temperature_k":5713,"orbital_period_days":15.852975,"transit_midpoint_bjd":2457225.04563,"equilibrium_temperature_k":720},"designations":[{"catalog":"Exoplanet","designation":"K2-195 b"}],"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."}