{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T11:18:41.227Z","years_from_j2000":26.68,"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":"hat-p-25-b","name":"HAT-P-25 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":979.7215736406625,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":48.4354731,"dec_deg":25.1973548,"epoch_ra_deg":48.831895,"epoch_dec_deg":25.297913,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-25","semi_major_axis_km":6971260.77462,"periapsis_km":null,"mass_kg":1.0800383105360563e+27,"mass_msun":0.000543167,"constellation":"Aries","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/hat-p-25-b","radius_km":81143.55949150001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-25","host_v_mag":13.146,"eccentricity":0.023,"uncertainties":{"mass_kg":[4.175895049524295e+25,4.365708460866308e+25],"radius_km":[3431.6218992,3431.6218992],"distance_ly":[13.639859716114211,14.024724241819966],"eccentricity":[0.014,0.022],"host_mass_solar":[0.051,0.053],"inclination_deg":[0.36,0.45],"host_radius_solar":[0.034,0.034],"host_temperature_k":[76,78],"semi_major_axis_km":[119678.29656,121174.27526699999],"orbital_period_days":[7.5e-7,7.6e-7],"argument_of_periastron_deg":[17,52]},"host_mass_solar":1.012,"inclination_deg":88.22,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.919,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"G5","host_temperature_k":5519,"orbital_period_days":3.65281514,"periastron_epoch_bjd":2455200.78,"transit_midpoint_bjd":2457759.39314,"equilibrium_temperature_k":1182,"argument_of_periastron_deg":287},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-25 b"},{"catalog":"Host star","designation":"HAT-P-25"}],"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."}