{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T21:59:07.352Z","years_from_j2000":26.684,"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-67537-b","name":"HIP 67537 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":378.4914300851721,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":207.5808445,"dec_deg":-39.9008996,"epoch_ra_deg":207.981844,"epoch_dec_deg":-40.034319,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 67537","semi_major_axis_km":719116964.4549,"periapsis_km":null,"mass_kg":2.5734773323525507e+28,"mass_msun":0.0129424,"constellation":"Centaurus","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/hip-67537-b","radius_km":78450.63,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 67537","host_v_mag":6.43,"eccentricity":0.586,"uncertainties":{"mass_kg":[4.5251290458319663e+27,9.608306723944631e+27],"distance_ly":[2.120016455158832,2.120016455158832],"eccentricity":[0.03,0.039],"host_mass_solar":[0.133,0.133],"inclination_deg":[41.268,50.409],"host_radius_solar":[0.88,0.88],"host_temperature_k":[100,100],"semi_major_axis_km":[22589278.4757,46824133.52909999],"orbital_period_days":[94.43206,240.39054],"argument_of_periastron_deg":[4.361,4.895]},"host_mass_solar":2.316,"inclination_deg":82.107,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":8.69,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"K1 III","host_temperature_k":4985,"orbital_period_days":2523.64713,"periastron_epoch_bjd":2451239.362,"equilibrium_temperature_k":323.2,"argument_of_periastron_deg":119.376},"designations":[{"catalog":"Exoplanet","designation":"HIP 67537 b"},{"catalog":"Host star","designation":"HIP 67537"}],"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."}