{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T12:46:29.253Z","years_from_j2000":26.686,"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-48265-b","name":"HD 48265 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":295.3169875781145,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":100.0073683,"dec_deg":-48.5418284,"epoch_ra_deg":100.184419,"epoch_dec_deg":-48.565774,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 48265","semi_major_axis_km":271370537.4498,"periapsis_km":null,"mass_kg":1.4046122038199734e+28,"mass_msun":0.007064,"constellation":"Puppis","discovered":"2008","featured":false,"url":"https://spacecatalog.org/object/hd-48265-b","radius_km":80364.06,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 48265","host_v_mag":8.05,"eccentricity":0.211,"uncertainties":{"mass_kg":[7.402685939051211e+27,7.023061019099867e+27],"distance_ly":[0.8763821869248896,0.8812745325906407],"eccentricity":[0.096,0.089],"host_mass_solar":[0.064,0.064],"inclination_deg":[3.4,11],"host_radius_solar":[0.126,0.126],"host_temperature_k":[55,55],"semi_major_axis_km":[4637533.991699999,4487936.120999999],"orbital_period_days":[5.18,5.38],"argument_of_periastron_deg":[23.111,21.261]},"host_mass_solar":1.312,"inclination_deg":11.7,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.901,"planets_in_system":2,"discovery_facility":"Las Campanas Observatory","host_spectral_type":"G5 IV/V","host_temperature_k":5733,"orbital_period_days":778.51,"periastron_epoch_bjd":2456036.7,"equilibrium_temperature_k":283,"argument_of_periastron_deg":308.313},"designations":[{"catalog":"Exoplanet","designation":"HD 48265 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."}