{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T00:46:39.618Z","years_from_j2000":26.682,"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-80869-b","name":"HD 80869 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":278.52156490759074,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":140.7912931,"dec_deg":33.9048294,"epoch_ra_deg":141.199855,"epoch_dec_deg":33.790044,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 80869","semi_major_axis_km":434581814.3834999,"periapsis_km":null,"mass_kg":9.614001097797651e+27,"mass_msun":0.00483502,"constellation":"Leo Minor","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/hd-80869-b","radius_km":81639.68000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 80869","host_v_mag":8.48,"eccentricity":0.924,"uncertainties":{"mass_kg":[1.0724403988326864e+27,4.836421480204013e+27],"distance_ly":[1.7312380529204743,1.7527643738497791],"eccentricity":[0.094,0.053],"host_mass_solar":[0.132,0.132],"inclination_deg":[39.104,29.555],"host_radius_solar":[0.042,0.042],"host_temperature_k":[15,15],"semi_major_axis_km":[19597321.061699998,18998929.5789],"orbital_period_days":[33.60283,37.0165],"argument_of_periastron_deg":[25.225,30.64]},"host_mass_solar":1.06,"inclination_deg":98.559,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.062,"planets_in_system":1,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"G5","host_temperature_k":5837,"orbital_period_days":1752.92067,"periastron_epoch_bjd":2455127.775,"equilibrium_temperature_k":203.2,"argument_of_periastron_deg":76.703},"designations":[{"catalog":"Exoplanet","designation":"HD 80869 b"},{"catalog":"Host star","designation":"HD 80869"}],"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."}