{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T08:27:22.356Z","years_from_j2000":26.677,"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-6860-b","name":"HD 6860 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":199.3620747945885,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":17.432979,"dec_deg":35.620499,"epoch_ra_deg":17.808073,"epoch_dec_deg":35.763707,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 6860","semi_major_axis_km":303683677.52099997,"periapsis_km":null,"mass_kg":5.364100118912492e+28,"mass_msun":0.0269768,"constellation":"Andromeda","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hd-6860-b","radius_km":75899.39,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 6860","host_v_mag":2.06763,"eccentricity":0.28,"uncertainties":{"mass_kg":[4.118930381472084e+27,3.8911554295012776e+27],"distance_ly":[9.261308192180245,9.261308192180245],"eccentricity":[0.09,0.1],"semi_major_axis_km":[1495978.707,1495978.707],"orbital_period_days":[4.31,4.61],"argument_of_periastron_deg":[4.99,10.72]},"host_mass_solar":2.49,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":86.4,"planets_in_system":1,"discovery_facility":"Bohyunsan Optical Astronomical Observatory","host_spectral_type":"M0 III","host_temperature_k":3802,"orbital_period_days":663.87,"periastron_epoch_bjd":2453272.89,"equilibrium_temperature_k":1196.06,"argument_of_periastron_deg":7.54},"designations":[{"catalog":"Exoplanet","designation":"HD 6860 b"},{"catalog":"Host star","designation":"HD 6860"}],"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."}