{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-05T02:07:23.960Z","years_from_j2000":26.676,"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-367-d","name":"GJ 367 d","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":30.699893055879507,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":146.121464,"dec_deg":-45.7790165,"epoch_ra_deg":146.378089,"epoch_dec_deg":-45.90207,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 367","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":3.6012172242782018e+25,"mass_msun":0.000018111,"constellation":"Vela","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/gj-367-d","radius_km":14860.973000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 367","host_v_mag":10.153,"eccentricity":0.14,"uncertainties":{"mass_kg":[2.926362255217776e+24,2.926362255217776e+24],"distance_ly":[0.009246533308269675,0.009246533308269675],"eccentricity":[0.09,0.09],"host_mass_solar":[0.011,0.011],"host_radius_solar":[0.013,0.013],"host_temperature_k":[70,70],"orbital_period_days":[0.073,0.073],"argument_of_periastron_deg":[38,287]},"host_mass_solar":0.455,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.458,"planets_in_system":3,"discovery_facility":"La Silla Observatory","host_spectral_type":"M1.0 V","host_temperature_k":3522,"orbital_period_days":34.369,"transit_midpoint_bjd":2459181.82,"argument_of_periastron_deg":-126},"designations":[{"catalog":"Exoplanet","designation":"GJ 367 d"}],"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."}