{"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":"2026-09-06T18:27:09.216Z","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-23127-b","name":"HD 23127 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":306.11569908793814,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":54.8491271,"dec_deg":-60.077229,"epoch_ra_deg":54.983363,"epoch_dec_deg":-59.989386,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 23127","semi_major_axis_km":354546953.559,"periapsis_km":null,"mass_kg":2.898450791192545e+27,"mass_msun":0.00145767,"constellation":"Reticulum","discovered":"2006","featured":false,"url":"https://spacecatalog.org/object/hd-23127-b","radius_km":86104.35,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 23127","host_v_mag":8.58,"eccentricity":0.406,"uncertainties":{"mass_kg":[7.21290963099651e+25,7.023096219654496e+25],"distance_ly":[0.668620574319324,0.6715559817187747],"eccentricity":[0.09,0.083],"host_mass_solar":[0.045,0.045],"host_radius_solar":[0.104,0.104],"host_temperature_k":[52,52],"semi_major_axis_km":[4787131.8624,4787131.8624],"orbital_period_days":[8.91,11.11],"argument_of_periastron_deg":[16.507,17.296]},"host_mass_solar":1.208,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.49,"planets_in_system":1,"discovery_facility":"Anglo-Australian Telescope","host_spectral_type":"G2 V","host_temperature_k":5843,"orbital_period_days":1211.17,"periastron_epoch_bjd":2457266.6,"equilibrium_temperature_k":223.4,"argument_of_periastron_deg":181.829},"designations":[{"catalog":"Exoplanet","designation":"HD 23127 b"},{"catalog":"Host star","designation":"HD 23127"}],"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."}