{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T08:59:21.827Z","years_from_j2000":26.675,"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":"nu-oph-b","name":"ν Oph b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":150.71914523755115,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":269.7566013,"dec_deg":-9.7741342,"epoch_ra_deg":270.126451,"epoch_dec_deg":-9.776577,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"ν Oph","semi_major_axis_km":264040241.78549996,"periapsis_km":null,"mass_kg":4.21499661226075e+28,"mass_msun":0.0211978,"constellation":"Ophiuchus","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/nu-oph-b","radius_km":76537.20000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"ν Oph","host_v_mag":3.31216,"eccentricity":0.126,"uncertainties":{"distance_ly":[5.652714029122196,5.652714029122196],"eccentricity":[0.004,0.003],"host_mass_solar":[0.57,0.32],"host_radius_solar":[1.76,2.55],"orbital_period_days":[0.07,0.08],"argument_of_periastron_deg":[1.2,1.6]},"host_mass_solar":2.61,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":12.24,"planets_in_system":2,"discovery_facility":"Okayama Astrophysical Observatory","host_spectral_type":"K0 III","host_temperature_k":4887,"orbital_period_days":529.93,"periastron_epoch_bjd":2451506,"equilibrium_temperature_k":620.57,"argument_of_periastron_deg":9.4},"designations":[{"catalog":"Exoplanet","designation":"nu Oph b"}],"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."}