{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:09:28.663Z","years_from_j2000":26.665,"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":"wolf-327-b","name":"Wolf 327 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":93.05926384651895,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":148.3783199,"dec_deg":35.570548,"epoch_ra_deg":148.779298,"epoch_dec_deg":35.444218,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Wolf 327","semi_major_axis_km":1495978.707,"periapsis_km":null,"mass_kg":1.5109584705512188e+25,"mass_msun":0.00000759883,"constellation":"Leo Minor","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/wolf-327-b","radius_km":7908.844,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Wolf 327","host_v_mag":13.018,"eccentricity":0,"uncertainties":{"mass_kg":[2.7471972191840344e+24,2.7471972191840344e+24],"radius_km":[382.68600000000004,382.68600000000004],"distance_ly":[0.16699206539097264,0.16699206539097264],"host_mass_solar":[0.019,0.019],"inclination_deg":[0.38,0.41],"host_radius_solar":[0.015,0.015],"host_temperature_k":[70,70],"semi_major_axis_km":[59839.14828,59839.14828],"orbital_period_days":[3e-7,3e-7]},"host_mass_solar":0.405,"inclination_deg":84.89,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.406,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2.5 V","host_temperature_k":3542,"orbital_period_days":0.5734745,"transit_midpoint_bjd":2459252.9811,"equilibrium_temperature_k":996},"designations":[{"catalog":"Exoplanet","designation":"Wolf 327 b"},{"catalog":"Host star","designation":"Wolf 327"}],"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":"2026-08-30T09:56:50.739Z","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."}