{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T01:43:32.358Z","years_from_j2000":26.682,"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-896-a-b","name":"GJ 896 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":20.418106789099117,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":352.9700384,"dec_deg":19.9370011,"epoch_ra_deg":353.306935,"epoch_dec_deg":20.085226,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 896 A","semi_major_axis_km":95690277.993255,"periapsis_km":null,"mass_kg":4.2897615954501885e+27,"mass_msun":0.00215738,"constellation":"Pegasus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/gj-896-a-b","radius_km":84828.73000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 896 A","host_v_mag":10.05,"eccentricity":0.35,"uncertainties":{"mass_kg":[1.0819310218613307e+27,1.0819310218613307e+27],"distance_ly":[0.010649005732451674,0.010649005732451674],"eccentricity":[0.19,0.19],"host_mass_solar":[0.00092,0.00092],"inclination_deg":[25.61,25.61],"host_radius_solar":[0.011678,0.011678],"host_temperature_k":[157,157],"semi_major_axis_km":[100230.57336899999,100230.57336899999],"orbital_period_days":[1.47,1.47],"argument_of_periastron_deg":[11.81,111.81]},"host_mass_solar":0.43599,"inclination_deg":69.2,"stars_in_system":2,"discovery_method":"Astrometry","host_radius_solar":0.394682,"planets_in_system":1,"discovery_facility":"Very Long Baseline Array","host_spectral_type":"M3.5 V","host_temperature_k":3345,"orbital_period_days":284.39,"periastron_epoch_bjd":2455702.65,"equilibrium_temperature_k":126.7,"argument_of_periastron_deg":353.11},"designations":[{"catalog":"Exoplanet","designation":"GJ 896 A b"},{"catalog":"Host star","designation":"GJ 896 A"}],"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."}