{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T19:39:42.753Z","years_from_j2000":26.687,"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-79098-ab-b","name":"HIP 79098 AB b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":475.52947558345755,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":242.1821202,"dec_deg":-23.6855244,"epoch_ra_deg":242.5842,"epoch_dec_deg":-23.756927,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 79098 AB","semi_major_axis_km":51611265391.49999,"periapsis_km":null,"mass_kg":3.891174932511275e+28,"mass_msun":0.0195693,"constellation":"Scorpius","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/hip-79098-ab-b","radius_km":77175.01000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 79098 AB","host_v_mag":5.86,"uncertainties":{"mass_kg":[8.541603510390603e+27,8.541603510390603e+27],"distance_ly":[8.075631912266568,8.356126397102965],"host_mass_solar":[1.25,1.25],"host_temperature_k":[93.42,61.25],"semi_major_axis_km":[897587224.1999999,897587224.1999999]},"host_mass_solar":3.75,"stars_in_system":2,"discovery_method":"Imaging","planets_in_system":1,"discovery_facility":"Paranal Observatory","host_spectral_type":"B9 V","host_temperature_k":9193.75,"equilibrium_temperature_k":2450},"designations":[{"catalog":"Exoplanet","designation":"HIP 79098 AB b"},{"catalog":"Host star","designation":"HIP 79098 AB"}],"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."}