{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T12:56:38.417Z","years_from_j2000":26.683,"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-109-001","name":"ESO 109-001","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":14.802,"mag_band":"B","abs_mag":-21.195416279371024,"abs_mag_band":"B","distance_ly":516308329.0156702,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":336.516785,"dec_deg":-63.284542,"epoch_ra_deg":336.982207,"epoch_dec_deg":-63.148018,"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":"Tucana","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-109-001","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.802,"h_mag":11.692,"j_mag":12.4,"k_mag":11.364,"redshift":0.03694,"redshift_cmb":0.0359867605900797,"uncertainties":{"distance_ly":[27203018.19692381,27216641.854159426],"stellar_mass_solar":[6538342507.820845,6538342507.820845]},"stellar_mass_solar":53240788992.255455},"designations":[{"catalog":"2MASX","designation":"2MASX 22260402-6317043"},{"catalog":"WISExSCOS","designation":"WISExSCOS J222604.14-631704.5"}],"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."}