{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T06:52:54.229Z","years_from_j2000":26.68,"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":"gj-486-b","name":"GJ 486 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":26.33471394343193,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":191.981531,"dec_deg":9.7494181,"epoch_ra_deg":192.320741,"epoch_dec_deg":9.602733,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 486","semi_major_axis_km":2564107.5037979996,"periapsis_km":null,"mass_kg":1.6542904993782121e+25,"mass_msun":0.00000831967,"constellation":"Virgo","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/gj-486-b","radius_km":8221.3709,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 486","host_v_mag":11.39,"eccentricity":0.00086,"uncertainties":{"mass_kg":[4.3596825434877066e+23,4.5388475795214483e+23],"radius_km":[89.2934,121.18390000000001],"distance_ly":[0.013356103667500643,0.013356103667500643],"eccentricity":[0.00043,0.0016],"host_mass_solar":[0.0069,0.007],"inclination_deg":[0.42,0.41],"host_radius_solar":[0.0034,0.0044],"host_temperature_k":[37,36],"semi_major_axis_km":[19447.723190999997,19447.723190999997],"orbital_period_days":[3.5e-7,3.1e-7],"argument_of_periastron_deg":[85,62]},"host_mass_solar":0.312,"inclination_deg":89.39,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.3243,"planets_in_system":1,"discovery_facility":"Calar Alto Observatory","host_spectral_type":"M3.5 V","host_temperature_k":3317,"orbital_period_days":1.46712127,"transit_midpoint_bjd":2459939.071602,"equilibrium_temperature_k":696.3,"argument_of_periastron_deg":14},"designations":[{"catalog":"Exoplanet","designation":"GJ 486 b"},{"catalog":"Host star","designation":"GJ 486"}],"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."}