{"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":"2026-09-05T19:27:31.852Z","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":"hd-87883-b","name":"HD 87883 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":59.657915360924974,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":152.1794175,"dec_deg":34.2419984,"epoch_ra_deg":152.572044,"epoch_dec_deg":34.110564,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 87883","semi_major_axis_km":563983972.5389999,"periapsis_km":null,"mass_kg":1.1977166224464908e+28,"mass_msun":0.00602349,"constellation":"Leo Minor","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/hd-87883-b","radius_km":81001.87,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 87883","host_v_mag":7.56,"eccentricity":0.72,"uncertainties":{"mass_kg":[6.073998719221506e+26,5.884186259245834e+26],"distance_ly":[0.04044339083687618,0.04076954721459293],"eccentricity":[0.027,0.038],"host_mass_solar":[0.02,0.02],"inclination_deg":[1.4,1.7],"host_radius_solar":[0.014354,0.014354],"host_temperature_k":[44,44],"semi_major_axis_km":[14062199.8458,17951744.483999997],"orbital_period_days":[124,117],"argument_of_periastron_deg":[3.7,3.7]},"host_mass_solar":0.8,"inclination_deg":16.8,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.798557,"planets_in_system":1,"discovery_facility":"Lick Observatory","host_spectral_type":"K0","host_temperature_k":4980,"orbital_period_days":3006,"periastron_epoch_bjd":2456913,"transit_midpoint_bjd":2454589,"equilibrium_temperature_k":110.52,"argument_of_periastron_deg":282.1},"designations":[{"catalog":"Exoplanet","designation":"HD 87883 b"},{"catalog":"Host star","designation":"HD 87883"}],"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."}