{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T11:19:50.083Z","years_from_j2000":26.686,"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-86226-c","name":"HD 86226 c","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":148.9980180323399,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":149.1235154,"dec_deg":-24.0991859,"epoch_ra_deg":149.43263,"epoch_dec_deg":-24.226605,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 86226","semi_major_axis_km":7330295.664299999,"periapsis_km":null,"mass_kg":4.32982170414875e+25,"mass_msun":0.0000217753,"constellation":"Hydra","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-86226-c","radius_km":13776.696000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 86226","host_v_mag":7.93,"eccentricity":0.075,"uncertainties":{"mass_kg":[6.688828011926346e+24,7.106879762671741e+24],"radius_km":[510.24800000000005,510.24800000000005],"distance_ly":[0.3418118838471471,0.34344266573573085],"eccentricity":[0.048,0.065],"host_mass_solar":[0.066,0.061],"inclination_deg":[0.16,0.26],"host_radius_solar":[0.026,0.026],"host_temperature_k":[88,88],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.00018,0.00018],"argument_of_periastron_deg":[90,60]},"host_mass_solar":1.019,"inclination_deg":86.45,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.053,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G1 V","host_temperature_k":5863,"orbital_period_days":3.98442,"transit_midpoint_bjd":2458543.2539,"equilibrium_temperature_k":1311,"argument_of_periastron_deg":196},"designations":[{"catalog":"Exoplanet","designation":"HD 86226 c"}],"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."}