{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T04:07:08.000Z","years_from_j2000":26.669,"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":"kepler-44-b","name":"Kepler-44 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3874.7377672749117,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":300.1023512,"dec_deg":45.7621918,"epoch_ra_deg":300.312332,"epoch_dec_deg":45.835399,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-44","semi_major_axis_km":6672065.03322,"periapsis_km":null,"mass_kg":1.898074391741456e+27,"mass_msun":0.000954569,"constellation":"Cygnus","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-44-b","radius_km":77940.38200000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-44","host_v_mag":14.803,"uncertainties":{"mass_kg":[1.8979549483841006e+26,1.8979549483841006e+26],"radius_km":[4974.918000000001,4974.918000000001],"distance_ly":[106.4737495056309,106.4737495056309],"host_mass_solar":[0.08,0.08],"inclination_deg":[0.62,0.5],"host_radius_solar":[0.08,0.08],"host_temperature_k":[100,100],"semi_major_axis_km":[164557.65777,164557.65777],"orbital_period_days":[0.000003,0.000003]},"host_mass_solar":1.12,"inclination_deg":84.96,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.35,"planets_in_system":1,"discovery_facility":"Kepler","host_spectral_type":"G2 IV","host_temperature_k":5800,"orbital_period_days":3.2467293,"transit_midpoint_bjd":2455187.1564,"eccentricity_upper_limit":0.066,"equilibrium_temperature_k":1544},"designations":[{"catalog":"Exoplanet","designation":"Kepler-44 b"},{"catalog":"Host star","designation":"Kepler-44"}],"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."}