{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T12:51:11.652Z","years_from_j2000":26.683,"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-3837-b","name":"TOI-3837 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1016.645737161975,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":152.6662832,"dec_deg":24.2731213,"epoch_ra_deg":153.042142,"epoch_dec_deg":24.141068,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-3837","semi_major_axis_km":14810189.1993,"periapsis_km":null,"mass_kg":1.1198935138564652e+27,"mass_msun":0.000563211,"constellation":"Leo","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-3837-b","radius_km":69347.23981496801,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-3837","host_v_mag":11.673,"eccentricity":0.221,"uncertainties":{"mass_kg":[9.490622998783604e+25,9.490622998783604e+25],"radius_km":[4289.519975404,3574.5999582430004],"distance_ly":[13.972539221385288,14.360665310868212],"eccentricity":[0.046,0.042],"host_mass_solar":[0.05,0.05],"inclination_deg":[0.15,0.15],"host_radius_solar":[0.05,0.06],"host_temperature_k":[155,157],"semi_major_axis_km":[747989.3535,897587.2241999999],"orbital_period_days":[0.00003,0.00003],"argument_of_periastron_deg":[5.9,6.1]},"host_mass_solar":0.89,"inclination_deg":88,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.2,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5905,"orbital_period_days":11.88865,"transit_midpoint_bjd":2458876.2853,"equilibrium_temperature_k":1178,"argument_of_periastron_deg":279.9},"designations":[{"catalog":"Exoplanet","designation":"TOI-3837 b"},{"catalog":"Host star","designation":"TOI-3837"}],"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."}