{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T12:42:14.222Z","years_from_j2000":26.678,"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":"k2-44-b","name":"K2-44 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":1554.7972372670472,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":174.011661,"dec_deg":-2.5209338,"epoch_ra_deg":174.355025,"epoch_dec_deg":-2.669467,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-44","semi_major_axis_km":8975872.241999999,"periapsis_km":null,"mass_kg":3.881909114064396e+25,"mass_msun":0.0000195227,"constellation":"Leo","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/k2-44-b","radius_km":15517.9173,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-44","host_v_mag":12.27,"uncertainties":{"radius_km":[459.2232,567.6509],"distance_ly":[31.93397094224635,33.27447365466217],"host_mass_solar":[0.06,0.06],"inclination_deg":[1.1633,1.0218],"host_radius_solar":[0.15,0.15],"host_temperature_k":[51,51],"semi_major_axis_km":[433833.82502999995,284235.95433],"orbital_period_days":[0.0002,0.0002]},"host_mass_solar":1.15,"inclination_deg":87.9933,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.58,"planets_in_system":1,"discovery_facility":"K2","host_temperature_k":5912,"orbital_period_days":5.657,"transit_midpoint_bjd":2456811.7094,"equilibrium_temperature_k":1211},"designations":[{"catalog":"Exoplanet","designation":"K2-44 b"},{"catalog":"Host star","designation":"K2-44"}],"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":"2026-09-02T19:50:56.720Z","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."}