{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T20:09:07.245Z","years_from_j2000":26.684,"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-2017-blg-0406l-b","name":"OGLE-2017-BLG-0406L b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":16960.13164127066,"distance_method":"NASA Exoplanet Archive sy_dist (Hirao+ 2020, 2020AJ....160...74H)","ra_deg":268.999667,"dec_deg":-29.8631389,"epoch_ra_deg":269.429806,"epoch_dec_deg":-29.867494,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"OGLE-2017-BLG-0406L","semi_major_axis_km":523592547.4499999,"periapsis_km":null,"mass_kg":7.763818228128794e+26,"mass_msun":0.000390454,"constellation":"Sagittarius","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/ogle-2017-blg-0406l-b","radius_km":90569.02,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"OGLE-2017-BLG-0406L","host_v_mag":26.1,"uncertainties":{"mass_kg":[1.1944335735582758e+26,1.1944335735582758e+26],"distance_ly":[1630.781888583717,1630.781888583717],"host_mass_solar":[0.07,0.07],"semi_major_axis_km":[44879361.20999999,44879361.20999999]},"host_mass_solar":0.56,"stars_in_system":1,"discovery_method":"Microlensing","planets_in_system":1,"discovery_facility":"OGLE"},"designations":[{"catalog":"Exoplanet","designation":"OGLE-2017-BLG-0406L b"},{"catalog":"Host star","designation":"OGLE-2017-BLG-0406L"}],"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."}