{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T12:40:30.497Z","years_from_j2000":26.678,"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":"tic-279401253-b","name":"TIC 279401253 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":931.4504297385845,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":57.6572277,"dec_deg":-15.0262251,"epoch_ra_deg":57.967832,"epoch_dec_deg":-14.944632,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TIC 279401253","semi_major_axis_km":55201614.28829999,"periapsis_km":null,"mass_kg":1.1654485042506265e+28,"mass_msun":0.00586121,"constellation":"Eridanus","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/tic-279401253-b","radius_km":71491.99980267,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TIC 279401253","host_v_mag":11.938,"eccentricity":0.448,"uncertainties":{"mass_kg":[7.972123318978228e+26,7.40268593905121e+26],"radius_km":[2859.6800048630002,2859.6800048630002],"distance_ly":[8.930161621884436,9.099762938297141],"eccentricity":[0.028,0.029],"host_mass_solar":[0.03,0.02],"inclination_deg":[0.25,0.27],"host_radius_solar":[0.01,0.01],"host_temperature_k":[80,80],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.06,0.06],"argument_of_periastron_deg":[6.7,6.1]},"host_mass_solar":1.13,"inclination_deg":89.59,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.06,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5951,"orbital_period_days":76.8,"transit_midpoint_bjd":2459151.055,"equilibrium_temperature_k":486.37,"argument_of_periastron_deg":137.6},"designations":[{"catalog":"Exoplanet","designation":"TIC 279401253 b"},{"catalog":"Host star","designation":"TIC 279401253"}],"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."}