{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T01:22:28.788Z","years_from_j2000":26.668,"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":"ph1-b","name":"PH1 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3369.7172320183067,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":298.2150641,"dec_deg":39.9550863,"epoch_ra_deg":298.447788,"epoch_dec_deg":40.023986,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"PH1","semi_major_axis_km":97537811.6964,"periapsis_km":null,"mass_kg":1.0092963696567432e+27,"mass_msun":0.00050759,"constellation":"Cygnus","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/ph1-b","radius_km":39416.658,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"PH1","host_v_mag":13.841,"eccentricity":0.0702,"uncertainties":{"radius_km":[1084.277,1084.277],"eccentricity":[0.0039,0.0029],"host_mass_solar":[0.087,0.087],"inclination_deg":[0.053,0.053],"host_radius_solar":[0.044,0.044],"host_temperature_k":[150,150],"semi_major_axis_km":[1795174.4483999999,1795174.4483999999],"orbital_period_days":[0.027,0.04],"argument_of_periastron_deg":[0.7,0.97]},"host_mass_solar":1.528,"inclination_deg":90.05,"stars_in_system":4,"discovery_method":"Transit","host_radius_solar":1.734,"planets_in_system":1,"discovery_facility":"Kepler","host_spectral_type":"F","host_temperature_k":6407,"orbital_period_days":138.317,"transit_midpoint_bjd":2455074.49,"equilibrium_temperature_k":481,"argument_of_periastron_deg":341.88},"designations":[{"catalog":"Exoplanet","designation":"PH1 b"},{"catalog":"Host star","designation":"PH1"}],"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":"2026-09-01T22:58:55.274Z","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."}