{"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":"2026-09-06T18:28:23.227Z","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":"hip-29442-c","name":"HIP 29442 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":222.41255709260165,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":93.0578446,"dec_deg":-14.6493167,"epoch_ra_deg":93.362988,"epoch_dec_deg":-14.655402,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-469","semi_major_axis_km":6758831.798225999,"periapsis_km":null,"mass_kg":2.6874755405061204e+25,"mass_msun":0.0000135157,"constellation":"Lepus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hip-29442-c","radius_km":9892.4331,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-469","host_v_mag":9.49,"uncertainties":{"mass_kg":[1.9110937176932413e+24,1.9110937176932413e+24],"radius_km":[287.0145,287.0145],"distance_ly":[0.5750136939146187,0.5779491013140693],"host_mass_solar":[0.043,0.043],"inclination_deg":[0.6,0.8],"host_radius_solar":[0.007,0.007],"host_temperature_k":[69,69],"semi_major_axis_km":[122670.25397399999,122670.25397399999],"orbital_period_days":[0.0000082,0.0000082]},"host_mass_solar":0.901,"inclination_deg":86.3,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.98,"planets_in_system":3,"discovery_facility":"Paranal Observatory","host_temperature_k":5289,"orbital_period_days":3.5379559,"transit_midpoint_bjd":2458471.36,"equilibrium_temperature_k":1123},"designations":[{"catalog":"Exoplanet","designation":"HIP 29442 c"}],"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."}