{"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":"2026-09-07T21:18:26.250Z","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":"hd-27442-b","name":"HD 27442 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":59.59007483435988,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":64.1205476,"dec_deg":-59.3028771,"epoch_ra_deg":64.240003,"epoch_dec_deg":-59.23565,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 27442","semi_major_axis_km":190138893.65969998,"periapsis_km":null,"mass_kg":2.961000828850966e+27,"mass_msun":0.00148913,"constellation":"Reticulum","discovered":"2000","featured":false,"url":"https://spacecatalog.org/object/hd-27442-b","radius_km":86104.35,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 27442","host_v_mag":4.44,"eccentricity":0.06,"uncertainties":{"mass_kg":[2.6576147011671637e+26,2.6576147011671637e+26],"distance_ly":[0.17775522585562517,0.17775522585562517],"eccentricity":[0.043,0.043],"host_radius_solar":[0.08,0.08],"host_temperature_k":[44,44],"semi_major_axis_km":[10920644.561099999,10920644.561099999],"orbital_period_days":[1.1,1.1]},"host_mass_solar":1.23,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":3.18,"planets_in_system":1,"discovery_facility":"Anglo-Australian Telescope","host_spectral_type":"K1/2III","host_temperature_k":4846,"orbital_period_days":428.1,"periastron_epoch_bjd":2450836,"equilibrium_temperature_k":369.62,"argument_of_periastron_deg":216},"designations":[{"catalog":"Exoplanet","designation":"HD 27442 b"},{"catalog":"Host star","designation":"HD 27442"}],"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."}