{"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":"2026-09-07T12:40:32.547Z","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":"ogle-2018-blg-1185l-b","name":"OGLE-2018-BLG-1185L 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":24135.57195103901,"distance_method":"NASA Exoplanet Archive sy_dist (Kondo+ 2021, 2021AJ....162...77K)","ra_deg":269.79275,"dec_deg":-27.8350833,"epoch_ra_deg":270.215992,"epoch_dec_deg":-27.837373,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"OGLE-2018-BLG-1185L","semi_major_axis_km":230380720.878,"periapsis_km":null,"mass_kg":5.0166210089447585e+25,"mass_msun":0.0000252293,"constellation":"Sagittarius","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/ogle-2018-blg-1185l-b","radius_km":18050.023,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"OGLE-2018-BLG-1185L","host_v_mag":29.3,"uncertainties":{"mass_kg":[2.8069188978619484e+25,4.71801261555519e+25],"distance_ly":[2870.176123907342,1663.3975263553914],"host_mass_solar":[0.21,0.35],"semi_major_axis_km":[32911531.553999998,26927616.725999996]},"host_mass_solar":0.37,"stars_in_system":1,"discovery_method":"Microlensing","planets_in_system":1,"discovery_facility":"OGLE"},"designations":[{"catalog":"Exoplanet","designation":"OGLE-2018-BLG-1185L b"},{"catalog":"Host star","designation":"OGLE-2018-BLG-1185L"}],"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."}