{"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":"2026-09-06T21:29:25.000Z","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":"hd-106515-a-b","name":"HD 106515 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":111.1916015093036,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":183.7762699,"dec_deg":-7.2575413,"epoch_ra_deg":184.121527,"epoch_dec_deg":-7.406911,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 106515 A","semi_major_axis_km":670198460.7360001,"periapsis_km":null,"mass_kg":3.5874554935402017e+28,"mass_msun":0.0180418,"constellation":"Virgo","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/hd-106515-a-b","radius_km":77175.01000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 106515 A","host_v_mag":7.971,"eccentricity":0.571,"uncertainties":{"mass_kg":[2.657374439659409e+27,2.847186899635081e+27],"distance_ly":[0.27755907743694863,0.27918985932553236],"eccentricity":[0.012,0.012],"host_mass_solar":[0.03,0.03],"inclination_deg":[2.2,2.4],"host_radius_solar":[0.009,0.009],"host_temperature_k":[29,29],"semi_major_axis_km":[7479893.535,7479893.535],"orbital_period_days":[12,11],"argument_of_periastron_deg":[2.5,2.6]},"host_mass_solar":0.89,"inclination_deg":29.2,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":0.91,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"G5 V","host_temperature_k":5362,"orbital_period_days":3626,"periastron_epoch_bjd":2455435.8,"equilibrium_temperature_k":116.53,"argument_of_periastron_deg":124.1},"designations":[{"catalog":"Exoplanet","designation":"HD 106515 A b"},{"catalog":"Host star","designation":"HD 106515 A"}],"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."}