{"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":"2026-09-05T07:38:10.515Z","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-33844-b","name":"HD 33844 b","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":78.455775,"epoch_dec_deg":-14.918422,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 33844","semi_major_axis_km":239356593.12,"periapsis_km":null,"mass_kg":3.8152495679744696e+27,"mass_msun":0.00191874,"constellation":"Lepus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/hd-33844-b","radius_km":85466.54000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 33844","host_v_mag":7.29,"eccentricity":0.15,"uncertainties":{"mass_kg":[5.8842157516024155e+26,5.8842157516024155e+26],"distance_ly":[1.239394235323625,1.2491789266551274],"eccentricity":[0.07,0.07],"host_mass_solar":[0.39,0.39],"host_radius_solar":[0.28,0.28],"host_temperature_k":[100,100],"semi_major_axis_km":[8975872.241999999,8975872.241999999],"orbital_period_days":[7.8,7.8],"argument_of_periastron_deg":[28,28]},"host_mass_solar":1.84,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":5.39,"planets_in_system":2,"discovery_facility":"Anglo-Australian Telescope","host_spectral_type":"K0 III","host_temperature_k":4861,"orbital_period_days":551.40002,"periastron_epoch_bjd":2454609,"equilibrium_temperature_k":430.22,"argument_of_periastron_deg":211},"designations":[{"catalog":"Exoplanet","designation":"HD 33844 b"}],"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."}