{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.688","julian_year":2026.688,"time":"2026-09-09T04:55:10.321Z","years_from_j2000":26.688,"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":"gj-1132-b","name":"GJ 1132 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":41.13810392141285,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":153.7090696,"dec_deg":-47.1549358,"epoch_ra_deg":153.979861,"epoch_dec_deg":-47.288198,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 1132","semi_major_axis_km":2348686.5699899998,"periapsis_km":null,"mass_kg":1.0971160171902313e+25,"mass_msun":0.00000551755,"constellation":"Vela","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/gj-1132-b","radius_km":7599.599589165001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 1132","host_v_mag":13.68,"eccentricity":0.0118,"uncertainties":{"mass_kg":[1.1198935130800834e+24,1.1388747347709274e+24],"radius_km":[285.96798135200004,243.07277139299998],"distance_ly":[0.02283094644017204,0.02283094644017204],"eccentricity":[0.0099,0.047],"host_mass_solar":[0.0046,0.0048],"inclination_deg":[0.18,0.19],"host_radius_solar":[0.0081,0.0069],"host_temperature_k":[62,78],"semi_major_axis_km":[19447.723190999997,19447.723190999997],"orbital_period_days":[3e-7,2.9e-7],"argument_of_periastron_deg":[130,5.5]},"host_mass_solar":0.1945,"inclination_deg":88.16,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.2211,"planets_in_system":2,"discovery_facility":"Cerro Tololo Inter-American Observatory","host_spectral_type":"M4.5 V","host_temperature_k":3229,"orbital_period_days":1.62892911,"periastron_epoch_bjd":2459280.149,"transit_midpoint_bjd":2459280.98988,"equilibrium_temperature_k":583.8,"argument_of_periastron_deg":-95.8},"designations":[{"catalog":"Exoplanet","designation":"GJ 1132 b"},{"catalog":"Host star","designation":"GJ 1132"}],"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."}