{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T14:17:42.907Z","years_from_j2000":26.678,"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-34445-d","name":"HD 34445 d","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":150.32775758429105,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":79.4207483,"dec_deg":7.3527156,"epoch_ra_deg":79.78387,"epoch_dec_deg":7.381955,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 34445","semi_major_axis_km":72061294.31618999,"periapsis_km":null,"mass_kg":1.8334555354119534e+26,"mass_msun":0.0000922071,"constellation":"Orion","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/hd-34445-d","radius_km":38715.067,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 34445","host_v_mag":7.31,"eccentricity":0.027,"uncertainties":{"mass_kg":[2.3291454684386377e+25,2.3291454684386377e+25],"distance_ly":[0.3232209703172927,0.3248517522058764],"eccentricity":[0.027,0.051],"host_mass_solar":[0.02,0.02],"host_radius_solar":[0.08,0.08],"host_temperature_k":[44,44],"semi_major_axis_km":[493672.97331,493672.97331],"orbital_period_days":[0.18,0.18],"argument_of_periastron_deg":[97.4,97.4]},"host_mass_solar":1.07,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.38,"planets_in_system":6,"discovery_facility":"Multiple Observatories","host_spectral_type":"G0 V","host_temperature_k":5836,"orbital_period_days":117.87,"equilibrium_temperature_k":476.32,"argument_of_periastron_deg":246.4},"designations":[{"catalog":"Exoplanet","designation":"HD 34445 d"}],"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."}