{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T18:02:40.483Z","years_from_j2000":26.654,"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-85426-c","name":"HD 85426 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":176.03964330883508,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":148.1619305,"dec_deg":35.111008,"epoch_ra_deg":148.562243,"epoch_dec_deg":34.984987,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1774","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":6.151332903825121e+25,"mass_msun":0.0000309359,"constellation":"Leo Minor","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/hd-85426-c","radius_km":20346.139,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1774","host_v_mag":8.25,"eccentricity":0.06,"uncertainties":{"mass_kg":[8.958251801687069e+24,9.555468588466207e+24],"distance_ly":[0.6637282286535728,0.668620574319324],"eccentricity":[0.04,0.07],"host_mass_solar":[0.02,0.027],"host_radius_solar":[0.0069,0.0069],"host_temperature_k":[59,59],"orbital_period_days":[0.1,0.09],"argument_of_periastron_deg":[95,148]},"host_mass_solar":0.991,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.1303,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_temperature_k":5746,"orbital_period_days":35.73,"transit_midpoint_bjd":2459608,"equilibrium_temperature_k":640,"argument_of_periastron_deg":143},"designations":[{"catalog":"Exoplanet","designation":"HD 85426 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":"2026-08-27T16:03:54.983Z","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."}