{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.663","julian_year":2026.663,"time":"2026-08-31T06:43:43.399Z","years_from_j2000":26.663,"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-1069-b","name":"Wolf 1069 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":31.256902917744164,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":306.5242477,"dec_deg":58.5753044,"epoch_ra_deg":306.669221,"epoch_dec_deg":58.662539,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Wolf 1069","semi_major_axis_km":10052976.911039999,"periapsis_km":null,"mass_kg":7.524931513417138e+24,"mass_msun":0.0000037844,"constellation":"Cygnus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/wolf-1069-b","radius_km":6888.348000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Wolf 1069","host_v_mag":13.993,"uncertainties":{"mass_kg":[1.2541552522361896e+24,1.2541552522361896e+24],"distance_ly":[0.015818584319262058,0.015818584319262058],"host_mass_solar":[0.011,0.011],"host_radius_solar":[0.0063,0.0063],"host_temperature_k":[54,54],"semi_major_axis_km":[209437.01898,209437.01898],"orbital_period_days":[0.015,0.015]},"host_mass_solar":0.167,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.1813,"planets_in_system":1,"discovery_facility":"Calar Alto Observatory","host_spectral_type":"M5.0 V","host_temperature_k":3158,"orbital_period_days":15.564,"periastron_epoch_bjd":2458511.63,"equilibrium_temperature_k":250.1},"designations":[{"catalog":"Exoplanet","designation":"Wolf 1069 b"},{"catalog":"Host star","designation":"Wolf 1069"}],"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."}