{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T05:33:06.090Z","years_from_j2000":26.685,"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-75898-c","name":"HD 75898 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":254.56668358980681,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":133.4611999,"dec_deg":33.0566885,"epoch_ra_deg":133.876807,"epoch_dec_deg":32.955067,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 75898","semi_major_axis_km":1105528264.4729998,"periapsis_km":null,"mass_kg":1.6115077851934558e+28,"mass_msun":0.00810451,"constellation":"Lynx","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/hd-75898-c","radius_km":80364.06,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 75898","host_v_mag":8.03,"eccentricity":0.08,"uncertainties":{"mass_kg":[1.195818497846734e+27,1.2337809898418685e+27],"distance_ly":[0.9836876351936981,0.9915153882589],"eccentricity":[0.01,0.01],"host_mass_solar":[0.015,0.015],"inclination_deg":[3,2],"host_radius_solar":[0.04,0.04],"host_temperature_k":[52,52],"semi_major_axis_km":[7479893.535,5983914.828],"orbital_period_days":[40,44],"argument_of_periastron_deg":[6,7]},"host_mass_solar":1.295,"inclination_deg":153,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.55,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"F8 V","host_temperature_k":6122,"orbital_period_days":6717,"transit_midpoint_bjd":2452005.65,"equilibrium_temperature_k":135.2,"argument_of_periastron_deg":110},"designations":[{"catalog":"Exoplanet","designation":"HD 75898 c"},{"catalog":"Host star","designation":"HD 75898"}],"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."}