{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T20:49:08.513Z","years_from_j2000":26.684,"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":"bd-05-4868-a-b","name":"BD+05 4868 A b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":142.1020937382748,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":326.8614036,"dec_deg":6.6053185,"epoch_ra_deg":327.195932,"epoch_dec_deg":6.729558,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"BD+05 4868 A","semi_major_axis_km":3111635.7105599996,"periapsis_km":null,"mass_kg":3.702744078030655e+25,"mass_msun":0.0000186216,"constellation":"Pegasus","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/bd-05-4868-a-b","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"BD+05 4868 A","host_v_mag":10.158,"uncertainties":{"distance_ly":[0.31669784276295787,0.31800246827382483],"host_mass_solar":[0.02,0.02],"host_radius_solar":[0.02,0.02],"host_temperature_k":[64,65],"semi_major_axis_km":[44879.361209999995,44879.361209999995],"orbital_period_days":[0.000001,0.000001]},"host_mass_solar":0.7,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.69,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K V","host_temperature_k":4596,"orbital_period_days":1.271869,"transit_midpoint_bjd":2460556.2892,"equilibrium_temperature_k":1820},"designations":[{"catalog":"Exoplanet","designation":"BD+05 4868 A b"},{"catalog":"Host star","designation":"BD+05 4868 A"}],"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."}