{"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":"2026-09-08T04:23:14.437Z","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":"hip-48714-b","name":"HIP 48714 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":34.343614260817645,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":149.0332672,"dec_deg":62.7859505,"epoch_ra_deg":149.529593,"epoch_dec_deg":62.658528,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 48714","semi_major_axis_km":16754961.518399999,"periapsis_km":null,"mass_kg":1.3676264417242258e+26,"mass_msun":0.0000687799,"constellation":"Ursa Major","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hip-48714-b","radius_km":32592.091000000004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 48714","host_v_mag":8.99,"eccentricity":0.5,"uncertainties":{"mass_kg":[1.6722070029815862e+25,1.6722070029815862e+25],"distance_ly":[0.014024724241819967,0.014024724241819967],"eccentricity":[0.08,0.08],"host_mass_solar":[0.02,0.02],"host_radius_solar":[0.01775,0.01775],"host_temperature_k":[128.4,166.5],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.002,0.002],"argument_of_periastron_deg":[14,14]},"host_mass_solar":0.58,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.595456,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"M0.5 Ve","host_temperature_k":4015.5,"orbital_period_days":17.818,"periastron_epoch_bjd":2451539.8,"equilibrium_temperature_k":446.47,"argument_of_periastron_deg":202},"designations":[{"catalog":"Exoplanet","designation":"HIP 48714 b"},{"catalog":"Host star","designation":"HIP 48714"}],"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."}