{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T19:21:50.274Z","years_from_j2000":26.681,"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-33844-c","name":"HD 33844 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":345.004954784994,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":78.1505649,"dec_deg":-14.9509775,"epoch_ra_deg":78.455846,"epoch_dec_deg":-14.918409,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 33844","semi_major_axis_km":335099230.36800003,"periapsis_km":null,"mass_kg":3.3217346984852344e+27,"mass_msun":0.00167055,"constellation":"Lepus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/hd-33844-c","radius_km":86104.35,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 33844","host_v_mag":7.29,"eccentricity":0.13,"uncertainties":{"mass_kg":[3.416641404156241e+26,3.416641404156241e+26],"distance_ly":[1.239394235323625,1.2491789266551274],"eccentricity":[0.1,0.1],"host_mass_solar":[0.18,0.18],"host_radius_solar":[0.41,0.41],"host_temperature_k":[100,100],"semi_major_axis_km":[7479893.535,7479893.535],"orbital_period_days":[29.5,29.5],"argument_of_periastron_deg":[67,67]},"host_mass_solar":1.78,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":5.29,"planets_in_system":2,"discovery_facility":"Anglo-Australian Telescope","host_spectral_type":"K0 III","host_temperature_k":4861,"orbital_period_days":916,"periastron_epoch_bjd":2454544,"equilibrium_temperature_k":360.22,"argument_of_periastron_deg":71},"designations":[{"catalog":"Exoplanet","designation":"HD 33844 c"},{"catalog":"Host star","designation":"HD 33844"}],"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."}