{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T03:09:28.769Z","years_from_j2000":26.685,"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-1051-b","name":"Kepler-1051 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2704.9550876473713,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":295.1581062,"dec_deg":40.8988186,"epoch_ra_deg":295.384232,"epoch_dec_deg":40.960592,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1051","semi_major_axis_km":27518528.315265,"periapsis_km":null,"mass_kg":6.867993047960086e+25,"mass_msun":0.0000345401,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1051-b","radius_km":21685.54,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1051","host_v_mag":13.212,"eccentricity":0,"uncertainties":{"radius_km":[4273.327,7845.063],"distance_ly":[32.980932914717094,33.78980073145462],"host_mass_solar":[0.159,0.221],"host_radius_solar":[0.338,0.622],"host_temperature_k":[222.6,270.59],"semi_major_axis_km":[166053.636477,166053.636477],"orbital_period_days":[0.00008634,0.00008634]},"host_mass_solar":1.43,"inclination_deg":89.96,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.73,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":6675,"orbital_period_days":25.96200249,"transit_midpoint_bjd":2454971.96618,"equilibrium_temperature_k":850},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1051 b"},{"catalog":"Host star","designation":"Kepler-1051"}],"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."}