{"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":"2026-09-07T20:31:35.984Z","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":"eso-598-026","name":"ESO 598-026","class":"spiral_galaxy","category":"galaxy","object_type":"Spiral galaxy","mag":15.217,"mag_band":"B","abs_mag":-19.21497048721337,"abs_mag_band":"B","distance_ly":251084539.9309457,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":316.951904,"dec_deg":-19.670597,"epoch_ra_deg":317.33304,"epoch_dec_deg":-19.562511,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Capricornus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-598-026","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.217,"h_mag":13.011,"j_mag":13.587,"k_mag":12.679,"redshift":0.01839,"hubble_type":"1.0","redshift_cmb":0.0177364863004102,"uncertainties":{"distance_ly":[13109450.529392932,13112920.552867008],"stellar_mass_solar":[934156016.8370436,934156016.8370436]},"major_axis_arcmin":0.373,"minor_axis_arcmin":0.202,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":155,"stellar_mass_solar":2802468050.511131},"designations":[{"catalog":"2MASX","designation":"2MASX 21074845-1940141"},{"catalog":"PGC","designation":"PGC 66152"},{"catalog":"WISExSCOS","designation":"WISExSCOS J210748.46-194014"}],"source":{"id":"glade_plus","name":"GLADE+ (Galaxy List for the Advanced Detector Era)","url":"https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/291","license":"VizieR terms; cite Dalya+ 2022 (2022MNRAS.514.1403D)"},"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."}