{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T07:13:13.780Z","years_from_j2000":26.68,"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-25912-b","name":"HD 25912 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":160.3583708245918,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":60.9074988,"dec_deg":-51.9315058,"epoch_ra_deg":61.086332,"epoch_dec_deg":-51.85699,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 25912","semi_major_axis_km":36202684.7094,"periapsis_km":null,"mass_kg":2.2777495197080647e+26,"mass_msun":0.000114551,"constellation":"Dorado","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-25912-b","radius_km":44008.89000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 25912","host_v_mag":8.2,"eccentricity":0.05,"uncertainties":{"mass_kg":[2.4675619790865203e+25,2.4675619790865203e+25],"distance_ly":[0.18753991718712748,0.1878660735648442],"eccentricity":[0.034,0.039],"host_mass_solar":[0.13,0.13],"host_radius_solar":[0.036276,0.045402],"host_temperature_k":[112.8,99.77],"semi_major_axis_km":[1495978.707,1346380.8362999998],"orbital_period_days":[0.03093,0.02308],"argument_of_periastron_deg":[38.447,46.619]},"host_mass_solar":1.08,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.995896,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_temperature_k":5920.58,"orbital_period_days":41.83156,"periastron_epoch_bjd":2453000.793,"equilibrium_temperature_k":579.16,"argument_of_periastron_deg":318.187},"designations":[{"catalog":"Exoplanet","designation":"HD 25912 b"},{"catalog":"Host star","designation":"HD 25912"}],"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."}