{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T04:13:10.345Z","years_from_j2000":26.682,"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":"hip-67851-c","name":"HIP 67851 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":209.12527242079926,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":208.465364,"dec_deg":-35.3146536,"epoch_ra_deg":208.859121,"epoch_dec_deg":-35.447,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 67851","semi_major_axis_km":680670311.685,"periapsis_km":null,"mass_kg":1.3167290348518344e+28,"mass_msun":0.00662202,"constellation":"Centaurus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/hip-67851-c","radius_km":81001.87,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 67851","host_v_mag":6.17,"eccentricity":0.3,"uncertainties":{"mass_kg":[9.832285426978699e+26,3.8816648065323546e+27],"distance_ly":[0.5701213482488675,0.5701213482488675],"eccentricity":[0.03,0.03],"host_mass_solar":[0.08,0.08],"inclination_deg":[24.73,28.378],"host_radius_solar":[0.11,0.11],"host_temperature_k":[43,43],"semi_major_axis_km":[7479893.535,7479893.535],"orbital_period_days":[47.13,52.09],"argument_of_periastron_deg":[8.22,8.66]},"host_mass_solar":1.28,"inclination_deg":89.863,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":5.45,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"K0 III","host_temperature_k":4840,"orbital_period_days":3128.41,"periastron_epoch_bjd":2453290,"equilibrium_temperature_k":255.43,"argument_of_periastron_deg":83.32},"designations":[{"catalog":"Exoplanet","designation":"HIP 67851 c"},{"catalog":"Host star","designation":"HIP 67851"}],"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."}