{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T19:51:38.423Z","years_from_j2000":26.687,"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":"denis-p-j082303-1-491201-b","name":"DENIS-P J082303.1-491201 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":67.7426796517676,"distance_method":"NASA Exoplanet Archive sy_dist (Sahlmann+ 2013, 2013A&A...556A.133S)","ra_deg":125.7620668,"dec_deg":-49.2003008,"epoch_ra_deg":125.964124,"epoch_dec_deg":-49.286066,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"DENIS-P J082303.1-491201","semi_major_axis_km":53855233.45199999,"periapsis_km":null,"mass_kg":5.409452294784472e+28,"mass_msun":0.0272049,"constellation":"Vela","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/denis-p-j082303-1-491201-b","radius_km":75899.39,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"DENIS-P J082303.1-491201","eccentricity":0.345,"uncertainties":{"mass_kg":[3.6062935669658243e+27,3.6062935669658243e+27],"distance_ly":[0.26092510217339476,0.26092510217339476],"eccentricity":[0.064,0.068],"host_mass_solar":[0.007,0.007],"inclination_deg":[2.1,1.9],"semi_major_axis_km":[1495978.707,1495978.707],"orbital_period_days":[1.35,1.38],"argument_of_periastron_deg":[8.4,7.2]},"host_mass_solar":0.075,"inclination_deg":56.6,"stars_in_system":1,"discovery_method":"Astrometry","planets_in_system":1,"discovery_facility":"Paranal Observatory","host_spectral_type":"L1.5","orbital_period_days":246.36,"argument_of_periastron_deg":36.3},"designations":[{"catalog":"Exoplanet","designation":"DENIS-P J082303.1-491201 b"},{"catalog":"Host star","designation":"DENIS-P J082303.1-491201"}],"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."}