{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T14:31:12.013Z","years_from_j2000":26.667,"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-3167-e","name":"HD 3167 e","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":154.23902486587025,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":8.7401487,"dec_deg":4.3807215,"epoch_ra_deg":9.085761,"epoch_dec_deg":4.528738,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 3167","semi_major_axis_km":56802311.50478999,"periapsis_km":null,"mass_kg":8.898530123009155e+25,"mass_msun":0.000044752,"constellation":"Pisces","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-3167-e","radius_km":25321.057000000004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 3167","host_v_mag":8.97,"eccentricity":0.128,"uncertainties":{"mass_kg":[2.866640576539862e+25,9.495746909788292e+25],"distance_ly":[0.4810806571321965,0.48434222090936396],"eccentricity":[0.087,0.11],"host_mass_solar":[0.034,0.039],"inclination_deg":[23,32],"host_radius_solar":[0.015,0.015],"host_temperature_k":[60,58],"semi_major_axis_km":[762949.14057,852707.8629899999],"orbital_period_days":[0.29,0.3],"argument_of_periastron_deg":[60,73]},"host_mass_solar":0.864,"inclination_deg":41,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.871,"planets_in_system":4,"discovery_facility":"CHaracterising ExOPlanets Satellite (CHEOPS)","host_spectral_type":"K0 V","host_temperature_k":5338,"orbital_period_days":91.9,"transit_midpoint_bjd":2457735.9,"equilibrium_temperature_k":389,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"HD 3167 e"}],"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":"2026-08-30T09:56:50.739Z","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."}