{"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":"2026-09-08T05:37:41.741Z","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":"hd-62549-b","name":"HD 62549 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":160.89457190955812,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":116.0821439,"dec_deg":-5.0541223,"epoch_ra_deg":116.414397,"epoch_dec_deg":-5.118209,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 62549","semi_major_axis_km":1771537984.8293998,"periapsis_km":null,"mass_kg":1.6170123465309585e+28,"mass_msun":0.00813219,"constellation":"Monoceros","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-62549-b","radius_km":80364.06,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 62549","host_v_mag":7.72,"eccentricity":0.15,"uncertainties":{"mass_kg":[1.9740495837469894e+27,3.9727747872848444e+27],"distance_ly":[0.3868214639720577,0.38877840223835813],"eccentricity":[0.099,0.13],"host_mass_solar":[0.134,0.134],"inclination_deg":[2.156,3.613],"host_radius_solar":[0.043661,0.062077],"host_temperature_k":[126.5,99.83],"semi_major_axis_km":[296054186.1153,321037030.5222],"orbital_period_days":[3219.89899,3762.35334],"argument_of_periastron_deg":[33.917,21.86]},"host_mass_solar":1.08,"inclination_deg":162.313,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.23227,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_temperature_k":5930.46,"orbital_period_days":14306.88519,"periastron_epoch_bjd":2440319.209,"equilibrium_temperature_k":92.25,"argument_of_periastron_deg":133.809},"designations":[{"catalog":"Exoplanet","designation":"HD 62549 b"},{"catalog":"Host star","designation":"HD 62549"}],"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."}