{"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":"2026-09-06T12:14:38.561Z","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":"hats-41-b","name":"HATS-41 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2405.9512283755466,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":103.5173558,"dec_deg":-27.0504156,"epoch_ra_deg":103.787021,"epoch_dec_deg":-27.083488,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-41","semi_major_axis_km":8721555.861809999,"periapsis_km":null,"mass_kg":1.84119009001753e+28,"mass_msun":0.00925961,"constellation":"Canis Major","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/hats-41-b","radius_km":95084.523457,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-41","host_v_mag":12.678,"eccentricity":0.38,"uncertainties":{"mass_kg":[3.037014581472215e+27,3.037014581472215e+27],"radius_km":[14298.42458,20732.715641000003],"distance_ly":[44.63450029053634,46.323990327109065],"eccentricity":[0.11,0.11],"host_mass_solar":[0.078,0.115],"inclination_deg":[4.2,2.3],"host_radius_solar":[0.24,0.36],"host_temperature_k":[91,91],"semi_major_axis_km":[149597.8707,224396.80604999998],"orbital_period_days":[0.000013,0.000013],"argument_of_periastron_deg":[18,18]},"host_mass_solar":1.496,"inclination_deg":80.4,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.71,"planets_in_system":1,"discovery_facility":"HATSouth","host_temperature_k":6424,"orbital_period_days":4.193649,"transit_midpoint_bjd":2456795.724,"equilibrium_temperature_k":1710,"argument_of_periastron_deg":136},"designations":[{"catalog":"Exoplanet","designation":"HATS-41 b"},{"catalog":"Host star","designation":"HATS-41"}],"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."}