{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T06:42:02.635Z","years_from_j2000":26.682,"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":"ugc-11039","name":"UGC 11039","class":"irregular_galaxy_irr","category":"galaxy","object_type":"Irregular galaxy Irr","mag":15.29,"mag_band":"B","abs_mag":-18.416348618634693,"abs_mag_band":"B","distance_ly":179761051.1446511,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":268.781,"dec_deg":18.5386,"epoch_ra_deg":269.075117,"epoch_dec_deg":18.533503,"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":"Hercules","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ugc-11039","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.29,"redshift":0.0122049961025,"hubble_type":"Irr","redshift_cmb":0.0127456158047299,"uncertainties":{"distance_ly":[35560669.21860174,35682927.099434],"stellar_mass_solar":[186837068.0718806,186837068.0718806]},"major_axis_arcmin":0.826507,"minor_axis_arcmin":0.635914,"morphology_source":"SIMBAD (2003A&A...412...45P, quality E)","position_angle_deg":107,"stellar_mass_solar":373674136.1437612},"designations":[{"catalog":"PGC","designation":"PGC 61104"},{"catalog":"WISExSCOS","designation":"WISExSCOS J175507.48+183220.1"}],"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."}