{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T14:37:33.827Z","years_from_j2000":26.683,"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-1265-b","name":"GJ 1265 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":33.43918262540912,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":333.4324675,"dec_deg":-17.6870623,"epoch_ra_deg":333.798495,"epoch_dec_deg":-17.554086,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 1265","semi_major_axis_km":3889544.6381999995,"periapsis_km":null,"mass_kg":4.419404222165621e+25,"mass_msun":0.0000222258,"constellation":"Aquarius","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/gj-1265-b","radius_km":16774.403000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 1265","host_v_mag":14.01,"eccentricity":0.04,"uncertainties":{"mass_kg":[2.9860839338956896e+24,2.9860839338956896e+24],"distance_ly":[0.024787884706472498,0.024461728328755754],"eccentricity":[0.04,0.04],"host_mass_solar":[0.018,0.018],"host_radius_solar":[0.007,0.007],"host_temperature_k":[51,51],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.0012,0.0012],"argument_of_periastron_deg":[72,72]},"host_mass_solar":0.178,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.192,"planets_in_system":1,"discovery_facility":"Calar Alto Observatory","host_spectral_type":"M4.5 V","host_temperature_k":3236,"orbital_period_days":3.6511,"equilibrium_temperature_k":424.04,"argument_of_periastron_deg":282},"designations":[{"catalog":"Exoplanet","designation":"GJ 1265 b"},{"catalog":"Host star","designation":"GJ 1265"}],"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."}