{"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":"2026-09-08T08:51:23.523Z","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":"gj-3293-c","name":"GJ 3293 c","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":65.85195113014365,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":67.1484425,"dec_deg":-25.1713396,"epoch_ra_deg":67.428388,"epoch_dec_deg":-25.11145,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 3293","semi_major_axis_km":54117029.725724995,"periapsis_km":null,"mass_kg":1.2595302033172019e+26,"mass_msun":0.0000633436,"constellation":"Eridanus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/gj-3293-c","radius_km":31061.347,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 3293","host_v_mag":11.945,"eccentricity":0.11,"uncertainties":{"mass_kg":[7.524931513417138e+24,7.40548815606131e+24],"distance_ly":[0.07044977758681659,0.07044977758681659],"eccentricity":[0.08,0.1],"host_radius_solar":[0.027,0.027],"host_temperature_k":[49,49],"semi_major_axis_km":[70310.999229,71806.977936],"orbital_period_days":[0.2371,0.2429],"argument_of_periastron_deg":[14.2,14.2]},"host_mass_solar":0.42,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.404,"planets_in_system":4,"discovery_facility":"La Silla Observatory","host_spectral_type":"M2.5","host_temperature_k":3466,"orbital_period_days":122.6196,"periastron_epoch_bjd":2455687.8,"equilibrium_temperature_k":176.62,"argument_of_periastron_deg":-21.4},"designations":[{"catalog":"Exoplanet","designation":"GJ 3293 c"}],"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."}