{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T21:22:15.016Z","years_from_j2000":26.668,"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":"dmpp-8-b","name":"DMPP-8 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":248.31426582897683,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":305.3083517,"dec_deg":-81.6166664,"epoch_ra_deg":306.478887,"epoch_dec_deg":-81.530908,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"DMPP-8","semi_major_axis_km":46345420.34286,"periapsis_km":null,"mass_kg":4.84283092399203e+26,"mass_msun":0.000243553,"constellation":"Octans","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/dmpp-8-b","radius_km":68883.48000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"DMPP-8","host_v_mag":8.65,"eccentricity":0.275,"uncertainties":{"mass_kg":[4.2402391861318795e+25,4.234267018264088e+25],"distance_ly":[0.6170878666400785,0.620349430417246],"eccentricity":[0.049,0.049],"host_mass_solar":[0.04,0.04],"host_radius_solar":[0.01,0.01],"host_temperature_k":[147.26,107.51],"semi_major_axis_km":[1615657.0035599999,1466059.1328599998],"orbital_period_days":[0.033,0.041],"argument_of_periastron_deg":[13,12]},"host_mass_solar":0.99,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.24,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_temperature_k":6009,"orbital_period_days":62.915,"periastron_epoch_bjd":2454205.2,"equilibrium_temperature_k":579.7,"argument_of_periastron_deg":187},"designations":[{"catalog":"Exoplanet","designation":"DMPP-8 b"},{"catalog":"Host star","designation":"DMPP-8"}],"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":"2026-08-30T09:56:50.739Z","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."}