{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T07:53:59.218Z","years_from_j2000":26.677,"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-145934-b","name":"HD 145934 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":743.2484151046921,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":243.2912249,"dec_deg":13.2394527,"epoch_ra_deg":243.604222,"epoch_dec_deg":13.170564,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 145934","semi_major_axis_km":731533587.7229999,"periapsis_km":null,"mass_kg":3.932914170672036e+27,"mass_msun":0.00197792,"constellation":"Hercules","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/hd-145934-b","radius_km":85466.54000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 145934","host_v_mag":8.495,"eccentricity":0.078,"uncertainties":{"mass_kg":[9.110998081221126e+25,3.101535596014426e+27],"distance_ly":[7.819599155758923,7.819599155758923],"eccentricity":[0.027,0.009],"host_mass_solar":[0.118,0.118],"inclination_deg":[41.759,40.879],"host_radius_solar":[0.171969,0.171969],"host_temperature_k":[78.09,78.09],"semi_major_axis_km":[16904559.3891,16156570.0356],"orbital_period_days":[49.34891,48.76203],"argument_of_periastron_deg":[92.493,60.943]},"host_mass_solar":2.058,"inclination_deg":81.958,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":6.930587,"planets_in_system":1,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"K0","host_temperature_k":4823.75,"orbital_period_days":2751.53433,"periastron_epoch_bjd":2448526.931,"transit_midpoint_bjd":2455976,"equilibrium_temperature_k":276.92,"argument_of_periastron_deg":186.316},"designations":[{"catalog":"Exoplanet","designation":"HD 145934 b"},{"catalog":"Host star","designation":"HD 145934"}],"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."}