{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T16:17:31.574Z","years_from_j2000":26.678,"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":"bd-55-362-b","name":"BD+55 362 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":171.45942929655885,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":23.9636676,"dec_deg":56.6982282,"epoch_ra_deg":24.398131,"epoch_dec_deg":56.835584,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"BD+55 362","semi_major_axis_km":116686339.146,"periapsis_km":null,"mass_kg":1.366649711824839e+27,"mass_msun":0.000687308,"constellation":"Cassiopeia","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/bd-55-362-b","radius_km":89293.40000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"BD+55 362","host_v_mag":9.38,"eccentricity":0.27,"uncertainties":{"mass_kg":[1.5184996798053766e+26,1.5184996798053766e+26],"distance_ly":[0.31669784276295787,0.31767631189610807],"eccentricity":[0.06,0.06],"host_mass_solar":[0.099,0.099],"host_radius_solar":[0.04255,0.062857],"host_temperature_k":[78,78],"semi_major_axis_km":[7479893.535,7479893.535],"orbital_period_days":[1.04,1.04],"argument_of_periastron_deg":[62.43,62.43]},"host_mass_solar":0.909,"inclination_deg":0.6012,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.896193,"planets_in_system":1,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"K3","host_temperature_k":5012,"orbital_period_days":265.59,"periastron_epoch_bjd":2458194.19,"equilibrium_temperature_k":259.06,"argument_of_periastron_deg":-134.44},"designations":[{"catalog":"Exoplanet","designation":"BD+55 362 b"},{"catalog":"Host star","designation":"BD+55 362"}],"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."}