{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T08:42:25.411Z","years_from_j2000":26.68,"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":"hr-810-b","name":"HR 810 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":56.484087649363346,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":40.6417178,"dec_deg":-50.7993484,"epoch_ra_deg":40.868577,"epoch_dec_deg":-50.684564,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HR 810","semi_major_axis_km":137630041.044,"periapsis_km":null,"mass_kg":1.1768372518491668e+28,"mass_msun":0.00591848,"constellation":"Horologium","discovered":"1999","featured":false,"url":"https://spacecatalog.org/object/hr-810-b","radius_km":81001.87,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HR 810","host_v_mag":5.4,"eccentricity":0.14,"uncertainties":{"mass_kg":[9.490622998783604e+26,9.490622998783604e+26],"distance_ly":[0.05283733319011243,0.05283733319011243],"eccentricity":[0.13,0.13],"host_mass_solar":[0.13,0.13],"inclination_deg":[6,6],"host_radius_solar":[0.02,0.02],"host_temperature_k":[24,24],"semi_major_axis_km":[2991957.414,2991957.414],"orbital_period_days":[2.3,2.3],"argument_of_periastron_deg":[5,5]},"host_mass_solar":1.34,"inclination_deg":87,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.13,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"G0V","host_temperature_k":6167,"orbital_period_days":302.79999,"periastron_epoch_bjd":2451492.8,"transit_midpoint_bjd":2451908.6,"equilibrium_temperature_k":329.57,"argument_of_periastron_deg":309},"designations":[{"catalog":"Exoplanet","designation":"HR 810 b"},{"catalog":"Host star","designation":"HR 810"}],"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."}