{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T22:28:15.888Z","years_from_j2000":26.676,"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":"kepler-619-d","name":"Kepler-619 d","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":2937.6187396916102,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":290.8490899,"dec_deg":48.4159782,"epoch_ra_deg":291.034773,"epoch_dec_deg":48.467283,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-619","semi_major_axis_km":15273942.598469999,"periapsis_km":null,"mass_kg":9.674911945822034e+25,"mass_msun":0.0000486565,"constellation":"Cygnus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/kepler-619-d","radius_km":26596.677,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-619","host_v_mag":14.84,"eccentricity":0,"uncertainties":{"radius_km":[2806.364,8355.311000000002],"distance_ly":[53.42930701566832,53.42930701566832],"host_mass_solar":[0.139,0.139],"host_radius_solar":[0.101,0.303],"host_temperature_k":[190,169],"orbital_period_days":[0.00002452,0.00002452]},"host_mass_solar":1.041,"inclination_deg":88.28,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.964,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":6122,"orbital_period_days":11.67894236,"transit_midpoint_bjd":2454964.5119,"equilibrium_temperature_k":830},"designations":[{"catalog":"Exoplanet","designation":"Kepler-619 d"}],"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."}