{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T17:32:58.637Z","years_from_j2000":26.684,"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-6061-b","name":"HD 6061 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":220.54792108119506,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":15.5981441,"dec_deg":37.1854394,"epoch_ra_deg":15.971674,"epoch_dec_deg":37.330009,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 6061","semi_major_axis_km":8975872.241999999,"periapsis_km":null,"mass_kg":5.972167867791379e+25,"mass_msun":0.0000300349,"constellation":"Andromeda","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hd-6061-b","radius_km":15483.702429017001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 6061","host_v_mag":8.844,"eccentricity":0,"uncertainties":{"mass_kg":[1.4930419669478448e+25,1.4930419669478448e+25],"radius_km":[464.55459000900004,631.635935419],"distance_ly":[0.6653590105421565,0.6695990434524742],"host_mass_solar":[0.035,0.0317],"host_radius_solar":[0.0161,0.0169],"host_temperature_k":[78,75],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.0011,0.0011]},"host_mass_solar":1.0269,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.0072,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5934,"orbital_period_days":5.2549,"transit_midpoint_bjd":2458769.7863,"equilibrium_temperature_k":1075.31,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"HD 6061 b"},{"catalog":"Host star","designation":"HD 6061"}],"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."}