{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T22:41:53.681Z","years_from_j2000":26.679,"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":"lp-261-75-b","name":"LP 261-75 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":110.6583358317367,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":147.7685281,"dec_deg":35.9685562,"epoch_ra_deg":148.171535,"epoch_dec_deg":35.84299,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"LP 261-75 A","semi_major_axis_km":67319041814.99999,"periapsis_km":null,"mass_kg":3.986061659489113e+28,"mass_msun":0.0200465,"constellation":"Leo Minor","discovered":"2006","featured":false,"url":"https://spacecatalog.org/object/lp-261-75-b","radius_km":77175.01000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"LP 261-75 A","host_v_mag":15.436,"uncertainties":{"mass_kg":[9.490622998783604e+27,1.8981245997567208e+28],"distance_ly":[0.5207086570247809,0.5207086570247809],"host_mass_solar":[0.03,0.03],"host_radius_solar":[0.005,0.005],"host_temperature_k":[157,157],"semi_major_axis_km":[17951744484,17951744484]},"host_mass_solar":0.22,"stars_in_system":1,"discovery_method":"Imaging","host_radius_solar":0.308,"planets_in_system":1,"discovery_facility":"Apache Point Observatory","host_spectral_type":"M4.5 V","host_temperature_k":3138,"equilibrium_temperature_k":1500},"designations":[{"catalog":"Exoplanet","designation":"LP 261-75 b"},{"catalog":"Host star","designation":"LP 261-75 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."}