{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T03:49:03.710Z","years_from_j2000":26.685,"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":"toi-1386-b","name":"TOI-1386 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":478.9867331872551,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":334.5041029,"dec_deg":54.3190454,"epoch_ra_deg":334.755993,"epoch_dec_deg":54.453221,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1386","semi_major_axis_km":25880431.631099995,"periapsis_km":null,"mass_kg":2.7352528834484516e+26,"mass_msun":0.00013756,"constellation":"Lacerta","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1386-b","radius_km":39648.73473565,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1386","host_v_mag":10.61,"eccentricity":0,"uncertainties":{"mass_kg":[3.4041356846410864e+25,3.463857363319e+25],"radius_km":[1081.53250357,1316.683164515],"distance_ly":[2.2178633684738553,2.2406943149140273],"host_mass_solar":[0.0352,0.0349],"inclination_deg":[0.25,0.21],"host_radius_solar":[0.0167,0.018],"host_temperature_k":[77,75],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.0031,0.0031]},"host_mass_solar":1.0363,"inclination_deg":89.69,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.0235,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G5V","host_temperature_k":5735,"orbital_period_days":25.8401,"periastron_epoch_bjd":2458744.1,"transit_midpoint_bjd":2458752.321,"equilibrium_temperature_k":615.03,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1386 b"}],"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."}