{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T13:29:06.009Z","years_from_j2000":26.681,"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-514-b","name":"GJ 514 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":24.845875310430536,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":202.5040424,"dec_deg":10.3725387,"epoch_ra_deg":202.838157,"epoch_dec_deg":10.233652,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 514","semi_major_axis_km":63130301.435399994,"periapsis_km":null,"mass_kg":3.105527291251517e+25,"mass_msun":0.0000156181,"constellation":"Virgo","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/gj-514-b","radius_km":13585.353000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 514","host_v_mag":9.05,"eccentricity":0.45,"uncertainties":{"mass_kg":[5.374951081012241e+24,5.374951081012241e+24],"distance_ly":[0.010355464992506603,0.010355464992506603],"eccentricity":[0.14,0.15],"host_mass_solar":[0.051,0.051],"host_radius_solar":[0.047,0.047],"host_temperature_k":[68,68],"semi_major_axis_km":[2243968.0604999997,2094370.1897999998],"orbital_period_days":[0.41,0.41],"argument_of_periastron_deg":[28,306]},"host_mass_solar":0.51,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.5,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"M0.5-1.0 V","host_temperature_k":3728,"orbital_period_days":140.43,"periastron_epoch_bjd":2458696.21,"equilibrium_temperature_k":202,"argument_of_periastron_deg":-143},"designations":[{"catalog":"Exoplanet","designation":"GJ 514 b"},{"catalog":"Host star","designation":"GJ 514"}],"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."}