{"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":"2026-09-06T20:33:39.458Z","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-25463-c","name":"HD 25463 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":148.78634254320173,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":60.7483361,"dec_deg":9.2077676,"epoch_ra_deg":61.113658,"epoch_dec_deg":9.282442,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 25463","semi_major_axis_km":6627185.672009999,"periapsis_km":null,"mass_kg":2.568032183150293e+25,"mass_msun":0.000012915,"constellation":"Taurus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hd-25463-c","radius_km":8696.855257293,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 25463","host_v_mag":6.91134,"eccentricity":0,"uncertainties":{"mass_kg":[1.134711894880362e+25,1.134711894880362e+25],"radius_km":[613.269750002,832.062753001],"distance_ly":[0.4067170030127791,0.4090000976567963],"host_mass_solar":[0.0229,0.0248],"host_radius_solar":[0.023,0.0241],"host_temperature_k":[77,85],"semi_major_axis_km":[119678.29656,119678.29656],"orbital_period_days":[0.00001,0.00001]},"host_mass_solar":1.251,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.4182,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6353,"orbital_period_days":3.04405,"transit_midpoint_bjd":2458438.473,"equilibrium_temperature_k":1585.57,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"HD 25463 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."}