{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T22:46:15.381Z","years_from_j2000":26.687,"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-778-b","name":"TOI-778 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":527.5351100103923,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":199.3338503,"dec_deg":-15.2737046,"epoch_ra_deg":199.691271,"epoch_dec_deg":-15.41549,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-778","semi_major_axis_km":8975872.241999999,"periapsis_km":null,"mass_kg":5.24356338792083e+27,"mass_msun":0.00263706,"constellation":"Virgo","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-778-b","radius_km":98222.74,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-778","host_v_mag":9.109,"eccentricity":0.21,"uncertainties":{"mass_kg":[4.299960864809793e+26,4.598569258199362e+26],"radius_km":[3189.05,3189.05],"distance_ly":[3.613812665101517,3.6627361217590284],"eccentricity":[0.04,0.04],"host_mass_solar":[0.05,0.05],"inclination_deg":[0.4,0.3],"host_radius_solar":[0.05,0.05],"host_temperature_k":[150,150],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.000001,0.000001],"argument_of_periastron_deg":[10,12]},"host_mass_solar":1.4,"inclination_deg":84.7,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.71,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F3 V","host_temperature_k":6643,"orbital_period_days":4.633611,"transit_midpoint_bjd":2458578.7161,"equilibrium_temperature_k":1561,"argument_of_periastron_deg":28},"designations":[{"catalog":"Exoplanet","designation":"TOI-778 b"},{"catalog":"Host star","designation":"TOI-778"}],"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."}