{"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":"2026-09-07T15:36:56.907Z","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":"chxr-73-b","name":"CHXR 73 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":620.9169425144731,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":166.6193985,"dec_deg":-77.6258725,"epoch_ra_deg":166.795667,"epoch_dec_deg":-77.770918,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CHXR 73","semi_major_axis_km":31415552846.999996,"periapsis_km":null,"mass_kg":2.3855740937542514e+28,"mass_msun":0.0119974,"constellation":"Chamaeleon","discovered":"2006","featured":false,"url":"https://spacecatalog.org/object/chxr-73-b","radius_km":78450.63,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CHXR 73","uncertainties":{"mass_kg":[9.93989106194807e+27,1.5903829282417633e+28],"distance_ly":[20.28692669398144,21.679614426831936],"host_temperature_k":[128,128]},"host_mass_solar":0.35,"stars_in_system":1,"discovery_method":"Imaging","planets_in_system":1,"discovery_facility":"Hubble Space Telescope","host_spectral_type":"M3.5","host_temperature_k":3099},"designations":[{"catalog":"Exoplanet","designation":"CHXR 73 b"},{"catalog":"Host star","designation":"CHXR 73"}],"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."}