{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T18:27:30.766Z","years_from_j2000":26.681,"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-25723-b","name":"HD 25723 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":374.4797066392561,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":61.0947182,"dec_deg":-12.7922241,"epoch_ra_deg":61.409504,"epoch_dec_deg":-12.718279,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 25723","semi_major_axis_km":222900827.343,"periapsis_km":null,"mass_kg":4.745311499391802e+27,"mass_msun":0.00238649,"constellation":"Eridanus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-25723-b","radius_km":84828.73000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 25723","host_v_mag":5.60075,"eccentricity":0.04,"uncertainties":{"mass_kg":[3.226811819586425e+26,2.657374439659409e+26],"distance_ly":[4.324833568524018,4.425942045616208],"eccentricity":[0.03,0.05],"host_mass_solar":[0.55,0.41],"host_radius_solar":[0.56,0.56],"host_temperature_k":[38,49],"semi_major_axis_km":[7479893.535,5983914.828],"orbital_period_days":[1.31,1.29],"argument_of_periastron_deg":[44.06,55.83]},"host_mass_solar":2.12,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":13.76,"planets_in_system":1,"discovery_facility":"Lick Observatory","host_spectral_type":"K1 III","host_temperature_k":4766,"orbital_period_days":457.01,"periastron_epoch_bjd":2451455.13,"equilibrium_temperature_k":698.4,"argument_of_periastron_deg":112.97},"designations":[{"catalog":"Exoplanet","designation":"HD 25723 b"},{"catalog":"Host star","designation":"HD 25723"}],"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."}