{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T07:59:00.492Z","years_from_j2000":26.677,"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":"gj-2056-b","name":"GJ 2056 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":92.7699631394842,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":108.0194945,"dec_deg":-24.8921008,"epoch_ra_deg":108.29731,"epoch_dec_deg":-24.936527,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 2056","semi_major_axis_km":42336197.408099994,"periapsis_km":null,"mass_kg":9.674911945822034e+25,"mass_msun":0.0000486565,"constellation":"Canis Major","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/gj-2056-b","radius_km":26596.677,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 2056","host_v_mag":10.37,"eccentricity":0.72,"uncertainties":{"mass_kg":[2.1499804324048965e+25,2.1499804324048965e+25],"distance_ly":[0.07599443600800122,0.07632059238571796],"eccentricity":[0.1,0.1],"host_mass_solar":[0.08,0.08],"host_radius_solar":[0.023886,0.015772],"host_temperature_k":[44.5,70.29],"semi_major_axis_km":[1944772.3190999997,1944772.3190999997],"orbital_period_days":[0.061,0.061],"argument_of_periastron_deg":[116,116]},"host_mass_solar":0.62,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.709495,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"M0V:","host_temperature_k":4069.95,"orbital_period_days":69.971,"periastron_epoch_bjd":2452965.6,"equilibrium_temperature_k":310.74,"argument_of_periastron_deg":58},"designations":[{"catalog":"Exoplanet","designation":"GJ 2056 b"},{"catalog":"Host star","designation":"GJ 2056"}],"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."}